24DH11
24DH11
(OP)
Does someone have an old joist table (not SJI) for these particular joists? I need to know capacities for a 40' span.
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RE: 24DH11
RE: 24DH11
Is this the nomenclature on the joist tag?
FYI, 24" DLH11 is not listed either as they start at 52".
A 24" LH11 is good for 768/418 at 40 feet with a safe load of 31,200#. (total load / live load)
Your nomenclature must be wrong.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: 24DH11
The designation is correct and I remember seeing tables of a particular manufacturer that used to make these to get an advantage over their competition that did not have these available. The capacities must be gotten out of the specific manufacturer's tables.
The year of the joists was 1969. I am thinking it might be Armco or Sheffield.
RE: 24DH11
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: 24DH11
http://www
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RE: 24DH11
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: 24DH11
RE: 24DH11
We also have a Ceco Deep Shortspan Steel Joists Catalog A.I.A. File No. 16-A (1967). It does list a 24DH11. "DH" Series Joists are fabricated from hot-rolled high strength steel sections having a minimum yield point of 50,000 psi. The design of these joists are based on allowable stress in tension of 30,000 psi. Ceco "DH" Series Open-Web Steel Joists are designed in accordance with the "H" Series specifications of the Steel Joist Institute.
Please see attachement for catalog pages.
Hope this helps.
RE: 24DH11
I downloaded the Ceco manual but they do not go to 32DH.
The joists are 4-ft o.c., current design snow load is 100-psf and should have been that in '76. The joists span approx 29-ft. This is a school building and I have mechanical equipment additions at several different roof areas.
Any help would be appreciated.