A crew is staging 24 modules, rail, and flashing for a rooftop array on a two-story office building. The structural drawing says staged loads must sit on the open-web joists at four feet on center, the roofing warranty requires protection boards under anything set on the membrane, and the two-foot strip along the eave is a cantilever rated only for foot traffic. Which staging arrangement satisfies the framing, warranty, and edge restrictions?
Select an answer to reveal the explanation.
Short Explanation
Your staging plan needs to fit all three rules, like placing pieces in the safe spaces on a board: small stacks go on protection boards over the joist lines, away from the cantilever edge strip. That protects the membrane, follows the framing requirements, and keeps materials off the foot-traffic-only edge.
Full Explanation
The correct arrangement coordinates all three constraints: small stacks placed on protection boards directly over the open-web joist lines transfer their loads to the framing locations specified by the structural drawing, the boards protect the roofing membrane as required by the warranty, and keeping the stacks away from the eave avoids loading a cantilever rated only for foot traffic. The light-load substitution approach—keeping stacks light and aligned over joists but omitting protection boards—still fails the warranty requirement; low weight does not replace required membrane protection. The membrane-protection-only approach—using boards near the array without confirming joist alignment—does not satisfy the structural staging instruction, because proximity to a joist is not the same as placement over its line. The short-carry convenience approach—placing protected stacks on the joist lines but within the cantilever strip—violates the edge restriction; correct support and membrane protection do not make that strip suitable for stored materials. Exam caveat: treat the joist locations, protection-board requirement, and cantilever limit as separate conditions that must all be met, rather than allowing compliance with one to compensate for another. Before staging, verify joist lines and the permitted area against the structural drawing, confirm protection boards are in place, and keep every stack outside the cantilever strip.