In the past few years I have noticed that many A/E firms have been requiring the contractor/fabricator to design items like stair systems and light guage metal framing for walls and store fronts. I am not referring to the detailing of connections, but to the sizing of members and the...
I am looking for load table information Armco Steel Joists, size 28DH09. Roof joists erected 1973. No information available from SJI, Metal tag off joists: Armco Steel Co., Kansas City, MO, 28DH09. 3 1/2" bearing depth, 50'-span. SJI has no information on this DH-series.
I am doing some preliminary investigation on an existing roof structure of a foundry, era 1970. The existing plans indicate that the joists are 28DH9's spaced at 4'-9" and span 50 ft. The total roof load on each joist is in the 280#/ft range when adjusted for drift load from a proposed...
