Which table is used to determine the maximum header span for a 2-2x10 header in a building with a given snow load?

Which table is used to determine the maximum header span for a 2-2x10 header in a building with a given snow load?

• A. IRC Table R602.7(1)
• B. IBC Table 2308.4.4
• C. IBC Table 2308.7.4
• D. IBC Table 2308.4.1.1(1)

Answer: (D)

Determining how far a double 2x10 header can span in a load-bearing wall under a given snow load is done by consulting the IBC’s header-span table for wood headers. This table translates header size and snow load into an allowable span. For a 2-2x10 header, you locate the row for two 2x10 members and read across to the column that matches your building’s snow load; the value you see is the maximum permissible span under that snow load. This specific table (how snow loads affect header spans) is the one you use, which is why it’s the correct reference. Other tables listed come from IRC or address different design conditions and do not apply to determining the snow-load–driven maximum span for a double 2x10 header.

Determining how far a double 2x10 header can span in a load-bearing wall under a given snow load is done by consulting the IBC’s header-span table for wood headers. This table translates header size and snow load into an allowable span. For a 2-2x10 header, you locate the row for two 2x10 members and read across to the column that matches your building’s snow load; the value you see is the maximum permissible span under that snow load. This specific table (how snow loads affect header spans) is the one you use, which is why it’s the correct reference. Other tables listed come from IRC or address different design conditions and do not apply to determining the snow-load–driven maximum span for a double 2x10 header.