In ASCE 7-05 the Roof Slope Factor Cs provides for a slippery roof surface (fig. 7-2), which can greatly reduce the snow load. But, when calculating unbalanced roof loads the roof surface does not come into play, and because the worst case is used to design structure, this effectively negates...
I work for a modular builder and we set the mods in place by lifting them with a cable that is 1/2 or 5/8 inch in diameter. The cable is threaded thru a hole drilled in the rim joists at the bottom of the mod. The rim joists are 2 plies of 2x12 SPF #1/#2. I've been charged with determining if we...
We build mostly R1 and R2 for the New England area and therefore aren't usually concerned about seismic calculations, but now I have a Daycare center going into Massachusetts. I'm trying to correlate the Mass. 780CMR code values with those obtained from ASCE 7-05. My question: in ASCE 7-05...
I was browsing through the threads and came across a warning, and ensuing discussion (thread404-157296), on whether Excel should calculate the expression -5^2 as equal to 25 or -25. If you use the Excel function Power(number,power) then there is no ambiguity. If you want to square -5 then you...
