Which construction type utilizes heavy timber interior framing with larger dimensions than Type 3?

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Multiple Choice

Which construction type utilizes heavy timber interior framing with larger dimensions than Type 3?

Explanation:
Type IV construction is defined by heavy timber interior framing using large-dimension lumber, bigger than what Type III allows. That distinctive use of oversized timber is what sets it apart, earning it the designation often called heavy timber or mill construction. In Type III, interior wood framing exists, but the members are smaller in size and the exterior walls are noncombustible. The other types rely on noncombustible framing (Type II and Type I) or an all-wood frame (Type V), so the hallmark feature here is the large heavy timber members inside.

Type IV construction is defined by heavy timber interior framing using large-dimension lumber, bigger than what Type III allows. That distinctive use of oversized timber is what sets it apart, earning it the designation often called heavy timber or mill construction. In Type III, interior wood framing exists, but the members are smaller in size and the exterior walls are noncombustible. The other types rely on noncombustible framing (Type II and Type I) or an all-wood frame (Type V), so the hallmark feature here is the large heavy timber members inside.

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