Side-by-Side Comparison
North American (ANSI & Arch)
ANSI C vs. Arch D
Comparing 2 standards across 9 specifications. 9 key differences identified.
Comparing:
ANSI C
Arch D
ANSI C is an engineering paper standard defined by ANSI/ASME Y14.1, measuring 17.0 × 22.0 inches (431.8 × 558.8 mm). Formed by joining two ANSI B (Tabloid) sheets or four ANSI A (Letter) sheets, it is the entry format for mechanical CAD assembly drawings and electrical wiring schematics.
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.
Specification Comparison Table
9 Parameters| Parameter / Spec | ||
|---|---|---|
|
Width × Height (Imperial)
|
17.00 × 22.00 in | 24.00 × 36.00 in |
|
Width × Height (Metric)
|
431.8 × 558.8 mm | 609.6 × 914.4 mm |
|
Aspect Ratio
|
1 : 1.2941 (17 : 22 — identical aspect ratio to ANSI A) | 2 : 3 (1 : 1.5000 — whole integer aspect ratio) |
|
Primary Applications
|
Mechanical component CAD drawings, electrical control panel schematics, industrial plumbing diagrams | US building permit sets, architectural floor plans, structural framing blueprints, MEP schematics |
|
ANSI Hierarchy
|
ANSI C = 2 × ANSI B (Tabloid) = 4 × ANSI A (Letter) | — |
|
International ISO Equivalent
|
A2 (420 × 594 mm) | — |
|
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 |