1961 Steel Joist - LA Series 1

[jrfroe]

I need to check an existing steel joist roof built in 1961 for loads due to some new HVAC equipment. The joists are designated as 40LA18 and they span 68'-10". An old thread (thread507-74306) was posted back in 2003, and it sounds like some of you have information on this series.

Thanks,
Jason

 

[jike]

According to the SJI 50 year Joist Digest, a 40LA18 has a uniform load capacity of 632 plf for a clear opening or net span of 69 feet.

Good luck!