Side-by-Side Comparison
North American (ANSI & Arch)
Arch D vs. US Legal
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
Arch D
US Legal
Arch D (Architectural D) is the dominant commercial architectural drawing paper format in the United States, measuring exactly 24.0 × 36.0 inches (609.6 × 914.4 mm). Operating on a clean 2:3 aspect ratio, it is the mandated standard for US building permit architectural blueprints, construction site floor plans, and residential elevations.
US Legal is a North American traditional paper size measuring 8.5 × 14.0 inches (215.9 × 355.6 mm). Sharing the 8.5-inch width of US Letter but extending 3 inches longer, it is used throughout the US and Canadian legal systems for courtroom trial transcripts, real estate deeds, and legislative statutes.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Imperial)
|
24.00 × 36.00 in | 8.50 × 14.00 in |
|
Width × Height (Metric)
|
609.6 × 914.4 mm | 215.9 × 355.6 mm |
|
Aspect Ratio
|
2 : 3 (1 : 1.5000 — whole integer aspect ratio) | 1 : 1.6471 (17 : 28) |
|
Primary Applications
|
US building permit sets, architectural floor plans, structural framing blueprints, MEP schematics | Court legal filings, real estate title contracts, commercial loan agreements, restaurant food menus |
|
Arch Series Hierarchy
|
Arch D = 2 × Arch C (18×24 in) = 4 × Arch B (12×18 in) = 8 × Arch A (9×12 in) | — |
|
Comparison to Engineering ANSI D
|
Arch D (24×36 in) is 2 inches wider and 2 inches longer than ANSI D (22×34 in) | — |
|
Plotter Roll Standard
|
Standard 24-inch and 36-inch wide wide-format bond rolls | — |
|
Surface Area
|
— | 119.0 in² (0.0768 m²) |
|
Height Comparison to Letter
|
— | +3.0 inches (76.2 mm) longer than standard US Letter |