Sheet size standards (U.S. architectural): Confirm or refute: an architectural “D” size sheet measures 24 in × 36 in (portrait or landscape as needed).

Introduction / Context:
In North American practice, architectural sheet sizes follow a lettered system (ARCH A, B, C, D, E). Correctly identifying these dimensions is important for printing, plotting, scaling, and sheet layout in offices and on construction sites.

Given Data / Assumptions:

• We are referring to U.S. architectural sheet sizes, not ISO A-series or ANSI engineering sizes.
• Common architectural sizes include: ARCH C (18×24), ARCH D (24×36), ARCH E (36×48).
• Orientation (portrait/landscape) does not change the numeric size.

Concept / Approach:
ARCH D measures 24 inches by 36 inches. This size is widely used for residential and commercial plan sets, providing enough space for floor plans, elevations, sections, schedules, and general notes while remaining manageable for plotters and plan racks. Confusing ARCH D with ANSI D or ISO formats leads to printing and scale mistakes.

Step-by-Step Solution:

Verification / Alternative check:
Check a plotter preset or CAD page setup menu; predefined templates typically list ARCH D as 24×36 in. Print service providers also reference this standard size for pricing.

Why Other Options Are Wrong:

• 18×24 is ARCH C.
• 30×42 and 22×34 correspond to ANSI engineering sizes (D and D oversize), not ARCH D.
• 36×48 is ARCH E.

Common Pitfalls:
Mixing up ARCH with ANSI or ISO; assuming metric A-series applies; forgetting orientation does not alter nominal dimensions.

Final Answer:
Correct: ARCH D is 24 in × 36 in