Which code references are cited for the minimum footing width calculation?

Which code references are cited for the minimum footing width calculation?

• A. IRC: R403.1.1 table 403.1(2) and IBC: 1809.4
• B. IBC: 2308.4.4 and IRC: R502.10
• C. OSHA: 1926.303(c)(1),(2),(3)
• D. Gypsum Construction: 637

Answer: (A)

Minimum footing width is defined by code provisions that specify how wide a footing must be to safely transfer loads to the soil. The IRC provides this through R403.1.1 together with table 403.1(2), which lists the minimum footing widths for different wall scenarios. The IBC reinforces it with section 1809.4, outlining the required footing dimensions based on bearing capacity and soil conditions. Together, these references are the official sources used to calculate the minimum footing width for both residential and other construction. The other options point to standards that don’t govern footing sizing, so they aren’t applicable here.

Minimum footing width is defined by code provisions that specify how wide a footing must be to safely transfer loads to the soil. The IRC provides this through R403.1.1 together with table 403.1(2), which lists the minimum footing widths for different wall scenarios. The IBC reinforces it with section 1809.4, outlining the required footing dimensions based on bearing capacity and soil conditions. Together, these references are the official sources used to calculate the minimum footing width for both residential and other construction. The other options point to standards that don’t govern footing sizing, so they aren’t applicable here.