mijowe:
i think it's reasonable for a building owner to ask his engineering consultant--a presumed expert with respect to buildings--how much snow his roof can handle. they don't understand what "20 psf" means--he wants a height of snow. i think that's a reasonable request. i'd explain that...
does anybody know of any requirement that f'c @ 7 days must be at least 75% f'c? on the particular job i'm working on (washington DC), we've had about 50% f'c after 7 days for several spread foundations...obviously~generally speaking~high early strength isn't as important with foundations as it...
