WildCat
NWO Master Conspirator
- Joined
- Mar 23, 2003
- Messages
- 59,856
No, not hard to design for but it adds greatly to the cost of a porch if the contractor actually follows the blueprint. Many don't, and the idiot building inspectors (who all come from a single politically-connected Carpenters Union Local) don't seem to notice this. So some contractors use undersized bolts, lighter-gauge supporting brackets than the code requires. And get away with it.WildCat: There's good reason for that 100psf. It's actually not that hard to design for and it's a good idea to do anyways. The International Building Code (which most of the nation uses, except some places which refuse to get rid of the old UBC), which currently references ASCE7, requires 100psf. Most of the nation now uses this.
Morons will over-use balconies, they have to be designed for the "drunken idiot" load. I actually have labeled a load on one of my calcs as the "drunken idiot" load too. It frequently controls design =\
And as far as inspections go, it's a complete crap shoot. I'm working on a porch repair right now (it's an old porch, but nothing is grandfathered in any more) where the inspector got all worked up over the decks (which IMHO were just fine, but it was the old-style 6x6 lookout in a pocket in the masonry at one end and notched into a 6x6 column at the other), so we tore them all out and did the whole ledger board construction they love now. Meanwhile, the winder stringers are completely miscut, badly designed and/or built, and are a clear and imminent hazard IMHO. But the inspector didn't write those up at all for some reason, go figure. The building owner is selling so doesn't want to do a single thing the inspector didn't write up, so there ya go. Oh, and when you go from 2x8 joists to 2x10 and 3/4" decking to 1 1/2" it really messes up the transition from deck to step... the first step is now either too high or too low, a complete cluster****.
I completely understand why the codes needed to be revised, but it is unecessary on existing porches that don't extend more than 7 feet from the building - the limit for a 6x6 lookout. But then people wanted 10 feet of porch, and incompetent carpenters like the guy who built the one that collapsed frequently underbuilt them.
The old designs were good for 150 lbs/sq. ft. dead load, don't know what the live load rating was.
Sorry for the derail folks...
