Fire Service Ventilation (7th Edition)-Chapter 4 Numbers

2x6 inches or larger . and are spaced at . 16 to 24 inch . on center. In hip roof construction, hip rafters run at a ... that span the length or width of the building. ... rotary saw (depending on type of roof) at a 45 degree angle to any exterior wall. The blade will usually encounter a rafter before the cut is 3 feet long. ................
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