An existing commercial building has a visibly sagging wood-framed floor. The observation alone has not established a cause. Which approach avoids prematurely diagnosing the problem?
- AConclude that joist spacing alone proves the cause
- Assess the framing, supports, bearing, connections, alterations and loading rather than treating subfloor damage as the only possible cause
- CConclude that termite damage must be the cause before inspecting the members
- DConclude that joist depth alone proves the cause
Where to look it up
https://www.huduser.gov/Publications/pdf/rehabinspect_2.pdf
Why B is correct
Sagging can result from several different mechanisms. HUD’s inspection guide, Section 4.7 (printed p.56), describes settlement, excessive spans, cut members, overloading and removed supports, and recommends checking support, bearing, connections and evidence of insect or fungal attack. These wood-framing diagnostic principles inform the approach here; that residential guide is not a commercial code requirement. IBC 2021 Section 1603.1 concerns structural construction documents, not a mandatory instruction to inspect the subfloor first. The observed sag alone does not identify a unique cause. Source: https://www.huduser.gov/Publications/pdf/rehabinspect_2.pdf