roof structural advice please
roof structural advice please
(OP)
house built 1952. A few rafters cracked and one is split. Im considering adding supports. Advice?
tks,
pa
tks,
pa
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roof structural advice please
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RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
Better to sister those rafters.
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
I assumed they had roof leak issues and figured if they siliconed all of the possible areas of water penetration it would help. It to me just looks like a messy, futile effort.
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
The big thing in uplift is roof rafter anchorage to the walls via uplift connections, and gable end bracing. The former is nearly impossible without removing soffit and other stuff at a minimum because access is nearly impossible. The latter is fairly simple and I recommend doing it, you have the space and clearly have an unbraced gable end, and it usually is one of the things that insurance companies offer discounts.
Here is a good website on the subject. Scroll down to the end of the document for the details on gable end bracing.
http://www.floridadisaster.org/hrg/content/roofs/b...
The other thing you could do for uplift improvement is to reinforce where the rafters connect to the ridge beam, looks like it is just toe nailed. You want to prevent the rafters from failing via uplift by shearing out those toe nailed connections (low capacity).
You could go a couple of different routes:
http://www.strongtie.com/ftp/fliers/F-LRU12.pdf
Or some type of twist strap that would connect to the sides of both rafter beams and go under the ridge beam.
RE: roof structural advice please
Im not looking for info on how good or smart it was for me to just shoot some subfloor in there w/o really thinking. If I thought it was adequate, I would not be here.
rafter to ridge beam will be with right angle simpson A33. However, since none of the sites suggest this, its one of the last things i will do.
Also adding vertical supports between rafters and joists. However all this is not why Im here.
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
might replace some of these screws with stronger ones. Started job by paying a licensed contractor. He used single led-nail drive thing on each strap. I failed the inspection, so i added the screws.
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
http://www.floridadisaster.org/hrg/content/roofs/c...
RE: roof structural advice please
What are the best strongest screws to use?
RE: roof structural advice please
Mike McCann
MMC Engineering
RE: roof structural advice please
RE: roof structural advice please
On the topic of a full length 2x6, remove a piece of the soffit and slide it up from the outside, it's quick and easy as long as you pay attention when taking the soffit down
RE: roof structural advice please
which screws stronger grk or simpson. I need 1" and 3"?
RE: roof structural advice please
RE: roof structural advice please
Im actually considering using both, but that sounds lame. Like the guy down the street when I was a kid who used 1 quart each of 5 different brands of motor oil when he changed his oil.
p
RE: roof structural advice please
The SD is only 8 ga x 1.25", but Simpson says the SD is not structural - but try telling that to me, the SD is far better than using a nail. BTDT.
ROTFL @ 5 different brands of oil. I hope he didn't use Pennsylvania-origin oil.
RE: roof structural advice please
RE: roof structural advice please
The SD9's are structural and they look to be more appropriate than the SDS types and the SD8, which is non-structural. They are an allowable substitute for nails in Simpson hardware and they may increase the actual capacity significantly by preventing nail withdrawal. (even double the actual tested load capacity)
RE: roof structural advice please
RE: roof structural advice please
RE: roof structural advice please
At the Simpson seminar, they load tested sawn lumber fastened by a single H2.5A, using nails. Failure at 3500#. Failure mode was nails bending and pulling out. The H2.5 was mangled but in one piece.
Same thing with SD9's. 8000#, failure mode was the H2.5 snapped apart suddenly. The connection to the wood itself was tight.
RE: roof structural advice please
RE: roof structural advice please