point supported glass
point supported glass
(OP)
I am analizing a glass canopy that is point supported. All of the ASTM E1300 tables/ software call for four or two sided support for glass analysis. Any ideas on how this should be done? It is 80" x 70" (9/16" laminated glass) with (3) point supports at ea. end of the 80" length and is subject to a 65 psf winload.






RE: point supported glass
RE: point supported glass
Problem will be the support condition. You might want to finely mesh the plate and spread the support over more than 1 element.
RE: point supported glass
RE: point supported glass
Check with your glass supplier. Some of them have analysis software for this purpose.
RE: point supported glass
RE: point supported glass
RE: point supported glass
Mike McCann
MMC Engineering
RE: point supported glass
RE: point supported glass
RE: point supported glass
RE: point supported glass
RE: point supported glass
Mike McCann
MMC Engineering
RE: point supported glass
If you have Roark's get the stress out of there and use the max allowable stress based on your glass type. There is a provision near the back of ASTM E-1300 that gives basic allowable stresses for annealed glass, heat strengthened, and fully tempered. Use those allowables, along with the reduction factors for laminated glass or long-term loads and compare that to your max stress from Roark.
RE: point supported glass
RE: point supported glass
RE: point supported glass
RE: point supported glass
RE: point supported glass
RE: point supported glass
And this also brings to my mind that for whatever the reason and in spite of having its logic I have never had a feeling by the most commonly seen (at least in print) point supported structural glass system (I think derived from Foster's practiceship, maybe with Arup's?) Maybe ugly is not a politically correct word for technology, but well, I always found it to be ugly.