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Existing Steel Joists w/New Drift Load

thread507-69163

Existing Steel Joists w/New Drift Load

Existing Steel Joists w/New Drift Load

(OP)
The new addition will be imposing a new drift load on the existing lower roof, composed of the following spec on the 1956 second floor plan:

PENN STEEL 41000 J14 - 24" oc
(The "41000" could be "#1000")

I need to investigate the existing capacity.

I have the SJI 60-year manual 1928-1988.  In it, I have found SJ-Series from 1955-1959, and J-Series from 1961-.

Can anyone provide info on "PENN STEEL"?
Can anyone explain the 41000 (or #1000)?

Thank You!
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RE: Existing Steel Joists w/New Drift Load

I am not familiar with that designation. However, I can reasonably conclude that the joists are 14 inches deep and they are spaced at 24 inches on center. However, the 41000 is perplexing. I can be the steel yield strength may be? Not sure!

I have a copy of the SJI 60-year manual 1928-1988. Based on brief check, I could not find a desingation like the one you stated (41000 J14 at 24" O.C.). If you know the year of the building was constructed, this will help. Call SJI at 803-626-1995 and ask to talk with Donald Murphy. He has been of great help to me in the past.  I am sure they/he can point you in the right direction.

I am sure some of the fellow engineers may shed more light on this.

Good luck.

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