{ "dataset": "Corrugated flute published-reference reconciliation", "version": "2.1.0", "last_verified": "2026-09-15", "method": "Source-labeled compilation; exact unit conversions; arithmetic residuals; explicitly hypothetical sinusoidal geometry model. No new physical board measurements.", "limits": "Counts of source rows are not counts of specimens. Manufacturer/audit publishers are not independent laboratories. No causation or copying lineage inferred from repeated wording.", "calculation_constants": { "mm_per_inch": "25.4", "mm_per_foot": "304.8" }, "metrics": { "source_reference_rows": 44, "source_reference_publishers": 8, "mismatch_pages": 5, "mismatch_publishers": 4, "new_physical_samples_measured": 0, "image_example_rows": 3, "source_rows_by_publisher": { "FEFCO": 5, "Fibre Box Association": 5, "PakFactory": 5, "President Container Group": 8, "Rogalka, Grabski & Garbowski": 3, "Summa": 8, "WebstaurantStore": 5, "Wikipedia contributors": 5 }, "count_300mm_to_foot_multiplier": "1.016", "count_300mm_to_foot_increase_percent": "1.6", "count_300mm_shortfall_percent_of_per_foot": "1.574803149606299212598425197", "one_eighth_inch_exact_mm": "3.1750" }, "source_records": [ { "record_id": "fba-a", "publisher": "Fibre Box Association", "publisher_type": "US trade association", "tier": "PRIMARY_PUBLICATION", "source_title": "What is Corrugated?", "source_url": "https://www.fibrebox.org/what-is-corrugated", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "A", "label_used_by_publisher": "flutes per foot ('about')", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "33", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Approximate flutes per linear foot. This page says profiles and counts can vary within a designation. No height is printed in this reference.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fba-b", "publisher": "Fibre Box Association", "publisher_type": "US trade association", "tier": "PRIMARY_PUBLICATION", "source_title": "What is Corrugated?", "source_url": "https://www.fibrebox.org/what-is-corrugated", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "flutes per foot ('about')", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "47", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Approximate flutes per linear foot. This page says profiles and counts can vary within a designation. No height is printed in this reference.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fba-c", "publisher": "Fibre Box Association", "publisher_type": "US trade association", "tier": "PRIMARY_PUBLICATION", "source_title": "What is Corrugated?", "source_url": "https://www.fibrebox.org/what-is-corrugated", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "flutes per foot ('about')", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "38", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Approximate flutes per linear foot. This page says profiles and counts can vary within a designation. No height is printed in this reference.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fba-e", "publisher": "Fibre Box Association", "publisher_type": "US trade association", "tier": "PRIMARY_PUBLICATION", "source_title": "What is Corrugated?", "source_url": "https://www.fibrebox.org/what-is-corrugated", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "flutes per foot ('about')", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "90", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Approximate flutes per linear foot. This page says profiles and counts can vary within a designation. No height is printed in this reference.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fba-f", "publisher": "Fibre Box Association", "publisher_type": "US trade association", "tier": "PRIMARY_PUBLICATION", "source_title": "What is Corrugated?", "source_url": "https://www.fibrebox.org/what-is-corrugated", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "F", "label_used_by_publisher": "flutes per foot ('about')", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "125", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Approximate flutes per linear foot. This page says profiles and counts can vary within a designation. No height is printed in this reference.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-g", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "G", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": "<=0.55", "pitch_mm": "<=1.8", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-f", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "F", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": "0.6-0.9", "pitch_mm": "1.9-2.6", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-e", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": "1.0-1.8", "pitch_mm": "3.0-3.5", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-d", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "D", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": "1.9-2.1", "pitch_mm": "3.8-4.8", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-b", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": "2.2-3.0", "pitch_mm": "5.5-6.5", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-c", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": "3.1-3.9", "pitch_mm": "6.8-7.9", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-a", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "A", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": "4.0-4.9", "pitch_mm": "8.0-9.5", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "summa-k", "publisher": "Summa", "publisher_type": "cutting-equipment manufacturer, support article", "tier": "PRIMARY_PUBLICATION", "source_title": "F Series - Packaging Info", "source_url": "https://support.summa.eu/support/solutions/articles/43000680145-f-series-packaging-info", "source_date": "2024-12-18", "date_basis": "visible 'Modified on' date", "date_checked": "2026-09-15", "flute": "K", "label_used_by_publisher": "Flute Height / mm; Flute Pitch / mm", "height_mm": ">=5.0", "pitch_mm": ">=10", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Published technical-support reference under a DIN 55468 heading. Full DIN standard not accessed; attribute ranges to Summa, not verified DIN requirements.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fefco-a", "publisher": "FEFCO", "publisher_type": "European trade federation", "tier": "PRIMARY_PUBLICATION", "source_title": "Corrugated board production, Table 2", "source_url": "https://www.fefco.org/lca/dscription-of-production-system/corrugated-board-production", "source_date": "", "date_basis": "Table 2 publication date not stated separately", "date_checked": "2026-09-15", "flute": "A", "label_used_by_publisher": "flute height, facings EXCLUDED", "height_mm": "4.8", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "110", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "1.50-1.55", "notes": "Indicative examples. Heights exclude facings. F,G,N remains one grouped observation. Glue values are per square metre per glue layer.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "4.5-5.0", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fefco-b", "publisher": "FEFCO", "publisher_type": "European trade federation", "tier": "PRIMARY_PUBLICATION", "source_title": "Corrugated board production, Table 2", "source_url": "https://www.fefco.org/lca/dscription-of-production-system/corrugated-board-production", "source_date": "", "date_basis": "Table 2 publication date not stated separately", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "flute height, facings EXCLUDED", "height_mm": "2.4", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "150", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "1.30-1.35", "notes": "Indicative examples. Heights exclude facings. F,G,N remains one grouped observation. Glue values are per square metre per glue layer.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "5.5-6.0", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fefco-c", "publisher": "FEFCO", "publisher_type": "European trade federation", "tier": "PRIMARY_PUBLICATION", "source_title": "Corrugated board production, Table 2", "source_url": "https://www.fefco.org/lca/dscription-of-production-system/corrugated-board-production", "source_date": "", "date_basis": "Table 2 publication date not stated separately", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "flute height, facings EXCLUDED", "height_mm": "3.6", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "130", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "1.40-1.45", "notes": "Indicative examples. Heights exclude facings. F,G,N remains one grouped observation. Glue values are per square metre per glue layer.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "5.0-5.5", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fefco-e", "publisher": "FEFCO", "publisher_type": "European trade federation", "tier": "PRIMARY_PUBLICATION", "source_title": "Corrugated board production, Table 2", "source_url": "https://www.fefco.org/lca/dscription-of-production-system/corrugated-board-production", "source_date": "", "date_basis": "Table 2 publication date not stated separately", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "flute height, facings EXCLUDED", "height_mm": "1.2", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "290", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "1.20-1.35", "notes": "Indicative examples. Heights exclude facings. F,G,N remains one grouped observation. Glue values are per square metre per glue layer.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "6.0-6.5", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "fefco-fgn", "publisher": "FEFCO", "publisher_type": "European trade federation", "tier": "PRIMARY_PUBLICATION", "source_title": "Corrugated board production, Table 2", "source_url": "https://www.fefco.org/lca/dscription-of-production-system/corrugated-board-production", "source_date": "", "date_basis": "Table 2 publication date not stated separately", "date_checked": "2026-09-15", "flute": "F,G,N", "label_used_by_publisher": "flute height, facings EXCLUDED", "height_mm": "0.5-0.8", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "400-550", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "1.15-1.25", "notes": "Indicative examples. Heights exclude facings. F,G,N remains one grouped observation. Glue values are per square metre per glue layer.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "9.0-11.0", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pcg-caliper-a", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "Caliper - Corrugated Board Thickness Explained", "source_url": "https://www.presidentcontainergroup.com/caliper/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "A", "label_used_by_publisher": "caliper - entire cross-section including liners, medium and adhesive", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "4.0-4.8", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pcg-caliper-c", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "Caliper - Corrugated Board Thickness Explained", "source_url": "https://www.presidentcontainergroup.com/caliper/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "caliper - entire cross-section including liners, medium and adhesive", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "3.2-4.0", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pcg-caliper-f", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "Caliper - Corrugated Board Thickness Explained", "source_url": "https://www.presidentcontainergroup.com/caliper/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "F", "label_used_by_publisher": "caliper - entire cross-section including liners, medium and adhesive", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "0.8-1.0", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pcg-cflute-c", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "C-Flute Corrugated - The Most Common Flute Profile", "source_url": "https://www.presidentcontainergroup.com/c-flute/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "Flute height", "height_mm": "3.2-4.0", "pitch_mm": "", "flutes_per_foot": "39-43", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pcg-bc-c", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "BC Flute (Double Wall)", "source_url": "https://www.presidentcontainergroup.com/bc-flute-double-wall/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "thick", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "39", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory. Source uses thick without distinguishing height from assembled caliper.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "3.5-4.0", "verification_symbol": "★" }, { "record_id": "pcg-inside-c", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "Inside Dimensions: How Corrugated Box Sizes Are Specified", "source_url": "https://www.presidentcontainergroup.com/inside-dimensions/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "board caliper", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "5/32", "board_caliper_mm": "", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory. Source publishes approximate 5/32 inch; metric equivalent belongs in derived output, not a raw-source field.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "wiki-a", "publisher": "Wikipedia contributors", "publisher_type": "encyclopedia", "tier": "AUDIT_ONLY", "source_title": "Corrugated fiberboard: Standard US corrugated flutes table", "source_url": "https://en.wikipedia.org/wiki/Corrugated_fiberboard", "source_date": "", "date_basis": "current rendered table; no specific revision timestamp used", "date_checked": "2026-09-15", "flute": "A", "label_used_by_publisher": "flute thickness", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "33 +/- 3", "flutes_per_metre": "108 +/- 10", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Preserved only as a record of this page's printed metric/count values, not authority for dimensions or tolerances. Fraction cells were not legible in the retrieved table and are not transcribed. F-row metre and foot counts are retained as published, not silently reconciled.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "4.8", "verification_symbol": "★" }, { "record_id": "wiki-b", "publisher": "Wikipedia contributors", "publisher_type": "encyclopedia", "tier": "AUDIT_ONLY", "source_title": "Corrugated fiberboard: Standard US corrugated flutes table", "source_url": "https://en.wikipedia.org/wiki/Corrugated_fiberboard", "source_date": "", "date_basis": "current rendered table; no specific revision timestamp used", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "flute thickness", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "47 +/- 3", "flutes_per_metre": "154 +/- 10", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Preserved only as a record of this page's printed metric/count values, not authority for dimensions or tolerances. Fraction cells were not legible in the retrieved table and are not transcribed. F-row metre and foot counts are retained as published, not silently reconciled.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "3.2", "verification_symbol": "★" }, { "record_id": "wiki-c", "publisher": "Wikipedia contributors", "publisher_type": "encyclopedia", "tier": "AUDIT_ONLY", "source_title": "Corrugated fiberboard: Standard US corrugated flutes table", "source_url": "https://en.wikipedia.org/wiki/Corrugated_fiberboard", "source_date": "", "date_basis": "current rendered table; no specific revision timestamp used", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "flute thickness", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "39 +/- 3", "flutes_per_metre": "128 +/- 10", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Preserved only as a record of this page's printed metric/count values, not authority for dimensions or tolerances. Fraction cells were not legible in the retrieved table and are not transcribed. F-row metre and foot counts are retained as published, not silently reconciled.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "4.0", "verification_symbol": "★" }, { "record_id": "wiki-e", "publisher": "Wikipedia contributors", "publisher_type": "encyclopedia", "tier": "AUDIT_ONLY", "source_title": "Corrugated fiberboard: Standard US corrugated flutes table", "source_url": "https://en.wikipedia.org/wiki/Corrugated_fiberboard", "source_date": "", "date_basis": "current rendered table; no specific revision timestamp used", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "flute thickness", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "90 +/- 4", "flutes_per_metre": "295 +/- 13", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Preserved only as a record of this page's printed metric/count values, not authority for dimensions or tolerances. Fraction cells were not legible in the retrieved table and are not transcribed. F-row metre and foot counts are retained as published, not silently reconciled.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "1.6", "verification_symbol": "★" }, { "record_id": "wiki-f", "publisher": "Wikipedia contributors", "publisher_type": "encyclopedia", "tier": "AUDIT_ONLY", "source_title": "Corrugated fiberboard: Standard US corrugated flutes table", "source_url": "https://en.wikipedia.org/wiki/Corrugated_fiberboard", "source_date": "", "date_basis": "current rendered table; no specific revision timestamp used", "date_checked": "2026-09-15", "flute": "F", "label_used_by_publisher": "flute thickness", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "125 +/- 4", "flutes_per_metre": "420 +/- 13", "thickness_inches": "", "board_caliper_mm": "", "take_up_factor": "", "notes": "Preserved only as a record of this page's printed metric/count values, not authority for dimensions or tolerances. Fraction cells were not legible in the retrieved table and are not transcribed. F-row metre and foot counts are retained as published, not silently reconciled.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "0.8", "verification_symbol": "★" }, { "record_id": "wss-a", "publisher": "WebstaurantStore", "publisher_type": "e-commerce supplier blog", "tier": "AUDIT_ONLY", "source_title": "Types of Corrugated Boxes", "source_url": "https://www.webstaurantstore.com/blog/1138/types-and-sizes-of-corrugated-boxes.html", "source_date": "2026-01-14", "date_basis": "visible 'Last updated on' date", "date_checked": "2026-09-15", "flute": "A", "label_used_by_publisher": "Flute Height", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "36", "flutes_per_metre": "", "thickness_inches": "1/4", "board_caliper_mm": "", "take_up_factor": "", "notes": "Values checked in visible per-flute bullet text. Retained as publisher statements, not an independently validated dimension standard.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "wss-b", "publisher": "WebstaurantStore", "publisher_type": "e-commerce supplier blog", "tier": "AUDIT_ONLY", "source_title": "Types of Corrugated Boxes", "source_url": "https://www.webstaurantstore.com/blog/1138/types-and-sizes-of-corrugated-boxes.html", "source_date": "2026-01-14", "date_basis": "visible 'Last updated on' date", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "Flute Height", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "49", "flutes_per_metre": "", "thickness_inches": "1/8", "board_caliper_mm": "", "take_up_factor": "", "notes": "Values checked in visible per-flute bullet text. Retained as publisher statements, not an independently validated dimension standard.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "wss-c", "publisher": "WebstaurantStore", "publisher_type": "e-commerce supplier blog", "tier": "AUDIT_ONLY", "source_title": "Types of Corrugated Boxes", "source_url": "https://www.webstaurantstore.com/blog/1138/types-and-sizes-of-corrugated-boxes.html", "source_date": "2026-01-14", "date_basis": "visible 'Last updated on' date", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "Flute Height", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "41", "flutes_per_metre": "", "thickness_inches": "11/64", "board_caliper_mm": "", "take_up_factor": "", "notes": "Values checked in visible per-flute bullet text. Retained as publisher statements, not an independently validated dimension standard.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "wss-e", "publisher": "WebstaurantStore", "publisher_type": "e-commerce supplier blog", "tier": "AUDIT_ONLY", "source_title": "Types of Corrugated Boxes", "source_url": "https://www.webstaurantstore.com/blog/1138/types-and-sizes-of-corrugated-boxes.html", "source_date": "2026-01-14", "date_basis": "visible 'Last updated on' date", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "Flute Height", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "90", "flutes_per_metre": "", "thickness_inches": "1/16", "board_caliper_mm": "", "take_up_factor": "", "notes": "Values checked in visible per-flute bullet text. Retained as publisher statements, not an independently validated dimension standard.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "wss-f", "publisher": "WebstaurantStore", "publisher_type": "e-commerce supplier blog", "tier": "AUDIT_ONLY", "source_title": "Types of Corrugated Boxes", "source_url": "https://www.webstaurantstore.com/blog/1138/types-and-sizes-of-corrugated-boxes.html", "source_date": "2026-01-14", "date_basis": "visible 'Last updated on' date", "date_checked": "2026-09-15", "flute": "F", "label_used_by_publisher": "Flute Height", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "128", "flutes_per_metre": "", "thickness_inches": "1/32", "board_caliper_mm": "", "take_up_factor": "", "notes": "Values checked in visible per-flute bullet text. Retained as publisher statements, not an independently validated dimension standard.", "evidence_role": "publication_audit_only", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "meas-c", "publisher": "Rogalka, Grabski & Garbowski", "publisher_type": "peer-reviewed journal, CC BY 4.0", "tier": "PRIMARY_STUDY", "source_title": "Identification of Geometric Features of the Corrugated Board Using Images and Genetic Algorithm, Sensors 23(13):6242, Table 1", "source_url": "https://www.mdpi.com/1424-8220/23/13/6242", "source_date": "2023-07-07", "date_basis": "publication date", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "flute height; flute period; board thickness (Table 1 image-based identification results)", "height_mm": "3.6", "pitch_mm": "8.13", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "4.29", "take_up_factor": "", "notes": "Published image-derived estimates, not new measurements by this site or proof of ISO 3034 caliper equivalence. Height is based on fitted geometry. Three displayed Table 1 examples; not the entire study sample size. CC BY 4.0.", "evidence_role": "published_image_estimate", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "0.51", "medium_material_thickness_mm": "0.49", "lower_liner_mm": "0.49", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "meas-b", "publisher": "Rogalka, Grabski & Garbowski", "publisher_type": "peer-reviewed journal, CC BY 4.0", "tier": "PRIMARY_STUDY", "source_title": "Identification of Geometric Features of the Corrugated Board Using Images and Genetic Algorithm, Sensors 23(13):6242, Table 1", "source_url": "https://www.mdpi.com/1424-8220/23/13/6242", "source_date": "2023-07-07", "date_basis": "publication date", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "flute height; flute period; board thickness (Table 1 image-based identification results)", "height_mm": "2.7", "pitch_mm": "6.39", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "3.13", "take_up_factor": "", "notes": "Published image-derived estimates, not new measurements by this site or proof of ISO 3034 caliper equivalence. Height is based on fitted geometry. Three displayed Table 1 examples; not the entire study sample size. CC BY 4.0.", "evidence_role": "published_image_estimate", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "0.46", "medium_material_thickness_mm": "0.34", "lower_liner_mm": "0.36", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "meas-e", "publisher": "Rogalka, Grabski & Garbowski", "publisher_type": "peer-reviewed journal, CC BY 4.0", "tier": "PRIMARY_STUDY", "source_title": "Identification of Geometric Features of the Corrugated Board Using Images and Genetic Algorithm, Sensors 23(13):6242, Table 1", "source_url": "https://www.mdpi.com/1424-8220/23/13/6242", "source_date": "2023-07-07", "date_basis": "publication date", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "flute height; flute period; board thickness (Table 1 image-based identification results)", "height_mm": "1.3", "pitch_mm": "3.5", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "1.79", "take_up_factor": "", "notes": "Published image-derived estimates, not new measurements by this site or proof of ISO 3034 caliper equivalence. Height is based on fitted geometry. Three displayed Table 1 examples; not the entire study sample size. CC BY 4.0.", "evidence_role": "published_image_estimate", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "0.40", "medium_material_thickness_mm": "0.36", "lower_liner_mm": "0.42", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pcg-caliper-b", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "Caliper - Corrugated Board Thickness Explained", "source_url": "https://www.presidentcontainergroup.com/caliper/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "caliper - entire cross-section including liners, medium and adhesive", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "2.5", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pcg-caliper-e", "publisher": "President Container Group", "publisher_type": "US box manufacturer", "tier": "PRIMARY_PUBLICATION", "source_title": "Caliper - Corrugated Board Thickness Explained", "source_url": "https://www.presidentcontainergroup.com/caliper/", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "caliper - entire cross-section including liners, medium and adhesive", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "", "flutes_per_metre": "", "thickness_inches": "", "board_caliper_mm": "1.5", "take_up_factor": "", "notes": "Manufacturer reference as labeled; not a tested specimen or universal specification. Ranges on separate pages can overlap without being contradictory.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pakfactory-a", "publisher": "PakFactory", "publisher_type": "packaging supplier", "tier": "PRIMARY_PUBLICATION", "source_title": "What is corrugated cardboard? — Flute Specifications", "source_url": "https://pakfactory.com/what-is-corrugated-cardboard", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "A", "label_used_by_publisher": "Flute Thickness (in); Flutes Per Linear (ft)", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "33 +/- 3", "flutes_per_metre": "", "thickness_inches": "3/16", "board_caliper_mm": "", "take_up_factor": "", "notes": "Fractions as published; no claim that they are universal ordering dimensions. Source renders count units awkwardly as ft in cells; normalized field retains the column meaning counts per linear foot. Stated plus/minus bands are publisher references, not certified tolerances.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pakfactory-b", "publisher": "PakFactory", "publisher_type": "packaging supplier", "tier": "PRIMARY_PUBLICATION", "source_title": "What is corrugated cardboard? — Flute Specifications", "source_url": "https://pakfactory.com/what-is-corrugated-cardboard", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "B", "label_used_by_publisher": "Flute Thickness (in); Flutes Per Linear (ft)", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "47 +/- 3", "flutes_per_metre": "", "thickness_inches": "1/8", "board_caliper_mm": "", "take_up_factor": "", "notes": "Fractions as published; no claim that they are universal ordering dimensions. Source renders count units awkwardly as ft in cells; normalized field retains the column meaning counts per linear foot. Stated plus/minus bands are publisher references, not certified tolerances.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pakfactory-c", "publisher": "PakFactory", "publisher_type": "packaging supplier", "tier": "PRIMARY_PUBLICATION", "source_title": "What is corrugated cardboard? — Flute Specifications", "source_url": "https://pakfactory.com/what-is-corrugated-cardboard", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "C", "label_used_by_publisher": "Flute Thickness (in); Flutes Per Linear (ft)", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "39 +/- 3", "flutes_per_metre": "", "thickness_inches": "5/32", "board_caliper_mm": "", "take_up_factor": "", "notes": "Fractions as published; no claim that they are universal ordering dimensions. Source renders count units awkwardly as ft in cells; normalized field retains the column meaning counts per linear foot. Stated plus/minus bands are publisher references, not certified tolerances.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pakfactory-e", "publisher": "PakFactory", "publisher_type": "packaging supplier", "tier": "PRIMARY_PUBLICATION", "source_title": "What is corrugated cardboard? — Flute Specifications", "source_url": "https://pakfactory.com/what-is-corrugated-cardboard", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "E", "label_used_by_publisher": "Flute Thickness (in); Flutes Per Linear (ft)", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "90 +/- 4", "flutes_per_metre": "", "thickness_inches": "1/16", "board_caliper_mm": "", "take_up_factor": "", "notes": "Fractions as published; no claim that they are universal ordering dimensions. Source renders count units awkwardly as ft in cells; normalized field retains the column meaning counts per linear foot. Stated plus/minus bands are publisher references, not certified tolerances.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" }, { "record_id": "pakfactory-f", "publisher": "PakFactory", "publisher_type": "packaging supplier", "tier": "PRIMARY_PUBLICATION", "source_title": "What is corrugated cardboard? — Flute Specifications", "source_url": "https://pakfactory.com/what-is-corrugated-cardboard", "source_date": "", "date_basis": "no publication/revision date stated in inspected page", "date_checked": "2026-09-15", "flute": "F", "label_used_by_publisher": "Flute Thickness (in); Flutes Per Linear (ft)", "height_mm": "", "pitch_mm": "", "flutes_per_foot": "125 +/- 4", "flutes_per_metre": "", "thickness_inches": "1/32", "board_caliper_mm": "", "take_up_factor": "", "notes": "Fractions as published; no claim that they are universal ordering dimensions. Source renders count units awkwardly as ft in cells; normalized field retains the column meaning counts per linear foot. Stated plus/minus bands are publisher references, not certified tolerances.", "evidence_role": "publisher_reference", "verification_status": "directly checked publication; not independent physical testing", "upper_liner_mm": "", "medium_material_thickness_mm": "", "lower_liner_mm": "", "glue_g_m2_per_glue_layer": "", "reported_thickness_mm": "", "verification_symbol": "★" } ], "unit_mismatch_audit": [ { "record_id": "mismatch-boxgenie", "publisher": "Box Genie", "source_title": "The Complete Guide to Corrugated Flutes", "source_url": "https://www.boxgenie.com/blogs/news/corrugated-flute", "source_date": "2021-12-09", "date_basis": "visible page date", "date_checked": "2026-09-15", "published_excerpt": "about 3.2 millimeters or 11/64 inches", "stated_mm": "3.2", "stated_fraction_inches": "11/64", "evidence_role": "publication_audit_only", "notes": "Current displayed pairing only. Page dates do not establish when wording appeared or who copied whom. Percentage denominator is the stated 3.2 mm.", "fraction_converted_mm": "4.3656250", "gap_mm": "1.1656250", "gap_percent_of_stated_mm": "36.4257812500", "display_converted_mm": "4.366", "display_gap_mm": "1.166", "display_gap_percent": "36.4" }, { "record_id": "mismatch-arvco-faq", "publisher": "Arvco Container Corporation", "source_title": "FAQ", "source_url": "https://arvco.com/faq-example/", "source_date": "", "date_basis": "no date stated in inspected content", "date_checked": "2026-09-15", "published_excerpt": "about 3.2 millimeters or 11/64 inches", "stated_mm": "3.2", "stated_fraction_inches": "11/64", "evidence_role": "publication_audit_only", "notes": "Current displayed pairing only. Page dates do not establish when wording appeared or who copied whom. Percentage denominator is the stated 3.2 mm.", "fraction_converted_mm": "4.3656250", "gap_mm": "1.1656250", "gap_percent_of_stated_mm": "36.4257812500", "display_converted_mm": "4.366", "display_gap_mm": "1.166", "display_gap_percent": "36.4" }, { "record_id": "mismatch-arvco-article", "publisher": "Arvco Container Corporation", "source_title": "Understanding the Different Types of Corrugated Flutes", "source_url": "https://arvco.com/articles/understanding-the-different-types-of-corrugated-flutes/", "source_date": "", "date_basis": "no date stated in inspected content", "date_checked": "2026-09-15", "published_excerpt": "about 3.2 millimeters–11/64 inches", "stated_mm": "3.2", "stated_fraction_inches": "11/64", "evidence_role": "publication_audit_only", "notes": "Current displayed pairing only. Page dates do not establish when wording appeared or who copied whom. Percentage denominator is the stated 3.2 mm.", "fraction_converted_mm": "4.3656250", "gap_mm": "1.1656250", "gap_percent_of_stated_mm": "36.4257812500", "display_converted_mm": "4.366", "display_gap_mm": "1.166", "display_gap_percent": "36.4" }, { "record_id": "mismatch-pakoro", "publisher": "Pakoro", "source_title": "Understanding the Different Types of Corrugated Flutes", "source_url": "https://pakoro.com/blog/understanding-the-different-types-of-corrugated-flutes/", "source_date": "2025-01-09", "date_basis": "visible Published on date", "date_checked": "2026-09-15", "published_excerpt": "Approximately 3.2 millimeters (11/64 inches)", "stated_mm": "3.2", "stated_fraction_inches": "11/64", "evidence_role": "publication_audit_only", "notes": "Current displayed pairing only. Page dates do not establish when wording appeared or who copied whom. Percentage denominator is the stated 3.2 mm.", "fraction_converted_mm": "4.3656250", "gap_mm": "1.1656250", "gap_percent_of_stated_mm": "36.4257812500", "display_converted_mm": "4.366", "display_gap_mm": "1.166", "display_gap_percent": "36.4" }, { "record_id": "mismatch-boxagency", "publisher": "Box Agency", "source_title": "Corrugated Flutes: Purpose, Types and Uses", "source_url": "https://boxagency.co/blog/corrugated-flutes-guide/", "source_date": "2025-03-18", "date_basis": "visible page date", "date_checked": "2026-09-15", "published_excerpt": "around 3.2 millimeters or 11/64 inches", "stated_mm": "3.2", "stated_fraction_inches": "11/64", "evidence_role": "publication_audit_only", "notes": "Current displayed pairing only. Page dates do not establish when wording appeared or who copied whom. Percentage denominator is the stated 3.2 mm.", "fraction_converted_mm": "4.3656250", "gap_mm": "1.1656250", "gap_percent_of_stated_mm": "36.4257812500", "display_converted_mm": "4.366", "display_gap_mm": "1.166", "display_gap_percent": "36.4" } ], "pitch_count_comparison": [ { "flute": "G", "pitch_mm_as_published": "<=1.8", "implied_count_min_per_ft": "169.3333333333", "implied_count_max_per_ft": "", "display_min_per_ft": "169.3", "display_max_per_ft": "", "fba_approx_per_ft": "", "literal_numerical_overlap_only": "", "source_record_id": "summa-g", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." }, { "flute": "F", "pitch_mm_as_published": "1.9-2.6", "implied_count_min_per_ft": "117.2307692308", "implied_count_max_per_ft": "160.4210526316", "display_min_per_ft": "117.2", "display_max_per_ft": "160.4", "fba_approx_per_ft": "125", "literal_numerical_overlap_only": "true", "source_record_id": "summa-f", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." }, { "flute": "E", "pitch_mm_as_published": "3.0-3.5", "implied_count_min_per_ft": "87.0857142857", "implied_count_max_per_ft": "101.6000000000", "display_min_per_ft": "87.1", "display_max_per_ft": "101.6", "fba_approx_per_ft": "90", "literal_numerical_overlap_only": "true", "source_record_id": "summa-e", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." }, { "flute": "D", "pitch_mm_as_published": "3.8-4.8", "implied_count_min_per_ft": "63.5000000000", "implied_count_max_per_ft": "80.2105263158", "display_min_per_ft": "63.5", "display_max_per_ft": "80.2", "fba_approx_per_ft": "", "literal_numerical_overlap_only": "", "source_record_id": "summa-d", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." }, { "flute": "B", "pitch_mm_as_published": "5.5-6.5", "implied_count_min_per_ft": "46.8923076923", "implied_count_max_per_ft": "55.4181818182", "display_min_per_ft": "46.9", "display_max_per_ft": "55.4", "fba_approx_per_ft": "47", "literal_numerical_overlap_only": "true", "source_record_id": "summa-b", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." }, { "flute": "C", "pitch_mm_as_published": "6.8-7.9", "implied_count_min_per_ft": "38.5822784810", "implied_count_max_per_ft": "44.8235294118", "display_min_per_ft": "38.6", "display_max_per_ft": "44.8", "fba_approx_per_ft": "38", "literal_numerical_overlap_only": "false", "source_record_id": "summa-c", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." }, { "flute": "A", "pitch_mm_as_published": "8.0-9.5", "implied_count_min_per_ft": "32.0842105263", "implied_count_max_per_ft": "38.1000000000", "display_min_per_ft": "32.1", "display_max_per_ft": "38.1", "fba_approx_per_ft": "33", "literal_numerical_overlap_only": "true", "source_record_id": "summa-a", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." }, { "flute": "K", "pitch_mm_as_published": ">=10", "implied_count_min_per_ft": "", "implied_count_max_per_ft": "30.4800000000", "display_min_per_ft": "", "display_max_per_ft": "30.5", "fba_approx_per_ft": "", "literal_numerical_overlap_only": "", "source_record_id": "summa-k", "verified_date": "2026-09-15", "notes": "Arithmetic comparison of different references, not a tolerance or compliance test." } ], "published_image_examples_and_derivations": [ { "flute": "C", "source_record_id": "meas-c", "flute_height_mm": "3.6", "flute_period_mm": "8.13", "image_board_thickness_mm": "4.29", "upper_liner_mm": "0.51", "medium_material_thickness_mm": "0.49", "lower_liner_mm": "0.49", "board_minus_height_mm": "0.69", "sum_liners_mm": "1.00", "residual_mm": "-0.31", "derived_flutes_per_m": "123.0012300123", "derived_flutes_per_ft": "37.4907749077", "display_flutes_per_m": "123.0", "display_flutes_per_ft": "37.5", "height_within_summa_reference": "true", "pitch_within_summa_reference": "false", "sinusoid_take_up_factor": "1.3801593623", "display_take_up_factor": "1.380", "fefco_indicative_take_up_range": "1.40-1.45", "signed_distance_to_nearest_fefco_boundary": "-0.0198406377", "verified_date": "2026-09-15", "notes": "Published image estimates; derived sine model is not a measured paper-consumption result. Residual is arithmetic, not a physical cause determination." }, { "flute": "B", "source_record_id": "meas-b", "flute_height_mm": "2.7", "flute_period_mm": "6.39", "image_board_thickness_mm": "3.13", "upper_liner_mm": "0.46", "medium_material_thickness_mm": "0.34", "lower_liner_mm": "0.36", "board_minus_height_mm": "0.43", "sum_liners_mm": "0.82", "residual_mm": "-0.39", "derived_flutes_per_m": "156.4945226917", "derived_flutes_per_ft": "47.6995305164", "display_flutes_per_m": "156.5", "display_flutes_per_ft": "47.7", "height_within_summa_reference": "true", "pitch_within_summa_reference": "true", "sinusoid_take_up_factor": "1.3516320841", "display_take_up_factor": "1.352", "fefco_indicative_take_up_range": "1.30-1.35", "signed_distance_to_nearest_fefco_boundary": "0.0016320841", "verified_date": "2026-09-15", "notes": "Published image estimates; derived sine model is not a measured paper-consumption result. Residual is arithmetic, not a physical cause determination." }, { "flute": "E", "source_record_id": "meas-e", "flute_height_mm": "1.3", "flute_period_mm": "3.5", "image_board_thickness_mm": "1.79", "upper_liner_mm": "0.40", "medium_material_thickness_mm": "0.36", "lower_liner_mm": "0.42", "board_minus_height_mm": "0.49", "sum_liners_mm": "0.82", "residual_mm": "-0.33", "derived_flutes_per_m": "285.7142857143", "derived_flutes_per_ft": "87.0857142857", "display_flutes_per_m": "285.7", "display_flutes_per_ft": "87.1", "height_within_summa_reference": "true", "pitch_within_summa_reference": "true", "sinusoid_take_up_factor": "1.2826118747", "display_take_up_factor": "1.283", "fefco_indicative_take_up_range": "1.20-1.35", "signed_distance_to_nearest_fefco_boundary": "0E-10", "verified_date": "2026-09-15", "notes": "Published image estimates; derived sine model is not a measured paper-consumption result. Residual is arithmetic, not a physical cause determination." } ], "fraction_conversions": [ { "flute": "A", "source_record_id": "pakfactory-a", "published_fraction_inches": "3/16", "exact_mm": "4.76250", "rounded_to_one_decimal_mm": "4.8", "rounding_gap_mm": "0.03750", "rounding_gap_percent_of_exact": "0.7874015748031496062992125984", "verified_date": "2026-09-15", "notes": "One-decimal metric result is our calculation, not a claim about the origin of all printed charts." }, { "flute": "B", "source_record_id": "pakfactory-b", "published_fraction_inches": "1/8", "exact_mm": "3.1750", "rounded_to_one_decimal_mm": "3.2", "rounding_gap_mm": "0.0250", "rounding_gap_percent_of_exact": "0.7874015748031496062992125984", "verified_date": "2026-09-15", "notes": "One-decimal metric result is our calculation, not a claim about the origin of all printed charts." }, { "flute": "C", "source_record_id": "pakfactory-c", "published_fraction_inches": "5/32", "exact_mm": "3.968750", "rounded_to_one_decimal_mm": "4.0", "rounding_gap_mm": "0.031250", "rounding_gap_percent_of_exact": "0.7874015748031496062992125984", "verified_date": "2026-09-15", "notes": "One-decimal metric result is our calculation, not a claim about the origin of all printed charts." }, { "flute": "E", "source_record_id": "pakfactory-e", "published_fraction_inches": "1/16", "exact_mm": "1.58750", "rounded_to_one_decimal_mm": "1.6", "rounding_gap_mm": "0.01250", "rounding_gap_percent_of_exact": "0.7874015748031496062992125984", "verified_date": "2026-09-15", "notes": "One-decimal metric result is our calculation, not a claim about the origin of all printed charts." }, { "flute": "F", "source_record_id": "pakfactory-f", "published_fraction_inches": "1/32", "exact_mm": "0.793750", "rounded_to_one_decimal_mm": "0.8", "rounding_gap_mm": "0.006250", "rounding_gap_percent_of_exact": "0.7874015748031496062992125984", "verified_date": "2026-09-15", "notes": "One-decimal metric result is our calculation, not a claim about the origin of all printed charts." } ], "fefco_count_conversions": [ { "flute_group": "A", "source_record_id": "fefco-a", "published_count_per_m": "110", "derived_min_per_ft": "33.5280", "derived_max_per_ft": "33.5280", "display_min_per_ft": "33.5", "display_max_per_ft": "33.5", "fba_comparison_per_ft": "33", "notes": "FGN grouped values are not assigned to F alone." }, { "flute_group": "B", "source_record_id": "fefco-b", "published_count_per_m": "150", "derived_min_per_ft": "45.7200", "derived_max_per_ft": "45.7200", "display_min_per_ft": "45.7", "display_max_per_ft": "45.7", "fba_comparison_per_ft": "47", "notes": "FGN grouped values are not assigned to F alone." }, { "flute_group": "C", "source_record_id": "fefco-c", "published_count_per_m": "130", "derived_min_per_ft": "39.6240", "derived_max_per_ft": "39.6240", "display_min_per_ft": "39.6", "display_max_per_ft": "39.6", "fba_comparison_per_ft": "38", "notes": "FGN grouped values are not assigned to F alone." }, { "flute_group": "E", "source_record_id": "fefco-e", "published_count_per_m": "290", "derived_min_per_ft": "88.3920", "derived_max_per_ft": "88.3920", "display_min_per_ft": "88.4", "display_max_per_ft": "88.4", "fba_comparison_per_ft": "90", "notes": "FGN grouped values are not assigned to F alone." }, { "flute_group": "F,G,N", "source_record_id": "fefco-fgn", "published_count_per_m": "400-550", "derived_min_per_ft": "121.9200", "derived_max_per_ft": "167.6400", "display_min_per_ft": "121.9", "display_max_per_ft": "167.6", "fba_comparison_per_ft": "", "notes": "FGN grouped values are not assigned to F alone." } ], "manufacturer_source_audit": [ { "record_id": "gbp-corporate", "publisher": "Green Bay Packaging", "source_url": "https://gbp.com/corrugated-packaging/converting-capabilities/", "scope": "company-wide", "published_flutes": "A; B; C; E", "published_wall_types": "singlewall; doublewall", "date_checked": "2026-09-15", "limitations": "Does not assign all corporate capabilities to the Green Bay plant; no numeric plant flute dimensions." }, { "record_id": "gbp-green-bay-plant", "publisher": "Green Bay Packaging", "source_url": "https://gbp.com/locations/green-bay-shipping-container-division/", "scope": "Green Bay Shipping Container Division plant", "published_flutes": "B; C; E", "published_wall_types": "double wall also named", "date_checked": "2026-09-15", "limitations": "In-house corrugator stated. A or F omission is not proof of unavailability. No numeric flute dimensions." }, { "record_id": "dssmith-range", "publisher": "DS Smith Sheetfeeding", "source_url": "https://www.dssmith.com/sheetfeeding/insights/about-fluting/flutes", "scope": "published sheetfeeding range", "published_flutes": "BC; RB; EB; EE; NE; C; B; R; E; F; N", "published_wall_types": "single and combined profiles listed", "date_checked": "2026-09-15", "limitations": "Specific range, not complete worldwide portfolio or availability census." }, { "record_id": "grupak-epd", "publisher": "Grupak / EPD International registry", "source_url": "https://www.environdec.com/library/epd26746", "scope": "EPD-IES-0026746:002 product scope", "published_flutes": "single: B; C; E; double: BC; BE; BB; CE", "published_wall_types": "single; double", "date_checked": "2026-09-15", "limitations": "Registry version 2025-11-26. Declaration scope, not necessarily full supplier range." } ] }