I am currently evaluating an existing building structure. There is a small office space, about 30'x70'x12' tall, tacked onto the front of a warehouse space that is 25' high and a roof length of 550' that is dumping snow drift on the office roof. The ground snow load is 20 psf (Ohio). The...
The supporting beams are at 6'-6" O.C. The concrete planks are only about 12" wide. One spot of spalling reveals some pretty heavy duty W.W.R., but otherwise, they seem to be in good shape. It seems like a pretty questionable system, but it's worked for over 50 years, with a ballasted roof...
I am currently using original construction drawings from 1959 to determine whether or not a roof stucture can support new imposed loading. The drawings show a " 2" lightweight pre-cast concrete plank" roof deck. This is the only information the drawings contain concerning the roof deck. What...
