Anchor bolts in wood sill plates
No, the provisions in Chapter J are for steel-to-steel joints, not steel-to-concrete joints with anchor rods. The base plates may be drilled or burned such that the drill does not drift as the hole is made. 1/4' is sufficient for this. Additionally, it should be noted that anchor rods are generally not designed to resist shear.
Anchor Hocking 10' Clear Presence Dinner Plate - Walmart.com
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- The templates hold the anchor bolts, and usually two or three template plates hold each anchor assembly in position. For this assembly, universal strut was used to position the anchor bolts, and there were no steel templates. On the jobsite, concrete “mud mats” are first cast under the slab.
Anchor bolts in wood sill plates
Here is a strange 'What was the Code thinking?' question...
In the NDS spec, section 11.5.1 deals with minimum bolt edge/end distances and spacings. 11.5.1.3 and Table 11.5.1.C states that the minimum edge distance needs to be 4D from the center of a bolt. So this begs the question, what do you do with 2x4 wall sill plates? Using a standard 5/8' anchor bolt centered in the wall, you don't meet the minimum 4D requirement, nor do you using the minimum 1/2' anchor bolt required by the IBC. So, whether intentional or not, the code is basically implying you cannot use 2x4 walls with anchor bolts that are subject to out-of-plane loads.
I'm just designing a little multi-stall garage, but it is taking a decent amount of out-of-plane load (100+ mph winds) especially at the king studs. Has anyone dealt with this code issue before or am relegated to using a 2x6 wall? I certainly wouldn't mind it but the architect might...
Thanks.
In the NDS spec, section 11.5.1 deals with minimum bolt edge/end distances and spacings. 11.5.1.3 and Table 11.5.1.C states that the minimum edge distance needs to be 4D from the center of a bolt. So this begs the question, what do you do with 2x4 wall sill plates? Using a standard 5/8' anchor bolt centered in the wall, you don't meet the minimum 4D requirement, nor do you using the minimum 1/2' anchor bolt required by the IBC. So, whether intentional or not, the code is basically implying you cannot use 2x4 walls with anchor bolts that are subject to out-of-plane loads.
I'm just designing a little multi-stall garage, but it is taking a decent amount of out-of-plane load (100+ mph winds) especially at the king studs. Has anyone dealt with this code issue before or am relegated to using a 2x6 wall? I certainly wouldn't mind it but the architect might...
Thanks.
Sill plate anchor requirement
Sill plate anchor requirement
J Plates Anchor Plate
Have a basic question regarding wood sill plates for which I can't seem to track down an exact source. According to NDS Table 8.5.3 the minimum edge distance for a bolt loaded perpendicular to grain is 4D for loaded edge and 1.5D for unloaded edge. For a wall subjected to wind pressures (positive and negative directions), this 4D requirement technically prevents the use of 1/2' diameter bolts in a 2x4 sill plate, since half of 3.5 inches is less than 4D distance. Of course, 1/2' and even 5/8' bolts are commonly used as anchor bolts. Can anyone help clear up the apparent conflict?