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Old 10-22-2011, 11:17 PM   #1
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how much torque for foundation bolt


the bolts are like the L shape ones, standard home depot stuff, 5/8 diameter. how much torque should i tighten it to? any rule of thumb number? i don't think it's waxed. how can i tell anyway? thx

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Old 10-22-2011, 11:42 PM   #2
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how much torque for foundation bolt


According to the building spec in my area....snug the nut...then turn about 3/4 more.

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Old 10-23-2011, 01:06 AM   #3
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how much torque for foundation bolt


Be sure you check before an inspection, the wood will shrink and the bolt will loosen. Usually the bolt is tightened at P&L then you get a shear inspection a couple days later. Depending on your area when you call for an insulation or mechanical inspection before you drywall the bolts will be loose if you do not check them. It's an easy write up for the inspector.
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Old 10-23-2011, 02:07 AM   #4
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how much torque for foundation bolt


ALWAYS let them sit a few days and re-tighten them, maybe 2 or 3 times, and double up on the washers (of whatever size the inspector says you need). I do not think it is silly to use a lock washer as well, esp if you have a lot of seismic activity. You can Google for torque tables, but I suspect that the proper torque for a 5/8" NC bolt is more than the wood can handle, unless you have stiff 3" diameter washers, etc.
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Old 10-23-2011, 09:48 AM   #5
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how much torque for foundation bolt


I’ve always tightened bolts into wood to the point where when washer starts sinking into the wood you stop.

I never remember the boss saying “go back and check the bolts you tightened last week”. Not to say that maybe you should.
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Old 10-23-2011, 10:08 AM   #6
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how much torque for foundation bolt


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ALWAYS let them sit a few days and re-tighten them, maybe 2 or 3 times, and double up on the washers (of whatever size the inspector says you need). I do not think it is silly to use a lock washer as well, esp if you have a lot of seismic activity. You can Google for torque tables, but I suspect that the proper torque for a 5/8" NC bolt is more than the wood can handle, unless you have stiff 3" diameter washers, etc.
so can I still redo it with a lock washer after I had already tightened it ?
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Old 10-23-2011, 10:18 AM   #7
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how much torque for foundation bolt


exactly i do the same thing, when im setting mud sills i use a impact driver and once the washer starts to indent the wood its good..

why slow down your project by two days so you can go back and tighten down the nuts... as soon as my sils are down i start setting corners with a laser level then string my dry line to stick frame the knee walls
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Old 10-23-2011, 11:02 AM   #8
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how much torque for foundation bolt


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so can I still redo it with a lock washer after I had already tightened it ?
Tighten down until the washer starts bending, that's all you need to do. Start framing. If you want to go back when your done framing for peace of mind go for it. You really don't need too.
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Old 10-23-2011, 12:51 PM   #9
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how much torque for foundation bolt


You are in California, I don't think lock washers are allowed at any time.

The washer needs to be a 3" x 3", slotted, steel washer about .299" thick min.

That is over a quarter inch thick. Just snug them up until the washer sinks into the wood (like Kwikfish said) just a bit.

Andy.
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Old 10-23-2011, 04:58 PM   #10
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how much torque for foundation bolt


true, earthquake zone codes will come into play for california
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Old 10-23-2011, 06:21 PM   #11
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how much torque for foundation bolt


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the bolts are like the L shape ones, standard home depot stuff, 5/8 diameter. how much torque should i tighten it to? any rule of thumb number? i don't think it's waxed. how can i tell anyway? thx
Doesn't really matter where they came from.

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