SDS screws to built up column around windows in tall wall 2

[pdev67]

Hi There, just curious to know

In 18' tall wall 2x6, 2 king stud and one cripple stud as a built up column (3ply) fastened with sds screw staggered at 24"oc but screw get inclined as there was not enough space to drill, how much strength will reduce or should add one more screw in between to make spacing 12" oc

 

[jayrod12]

That's a different kind of adhesive then the one being discussed here. Have to take comments in full context.

 

[pdev67]

jayrod12 (Structural)17 Nov 20 17:53
Well the CSA O86 (Canadian wood standard) allows for up to 4 ply stud packs to be nailed. Once you get to 5 ply they indicate they should be bolted, or else you have to take a strength reduction into account.
I don't know what the NDS says if you are in the US.

Thanks Jayrod12- I am in Alberta Canada, can you please advise which section of CSA O86 (Canadian wood standard) should I look for. I have CSA O86-14

 

[jayrod12]

Check out clause 6.5.6.4 should have everything you need regarding built up compression members.

 

[pdev67]

Got it, Thank you so much jayrod12, I appreciate your help

 

[racookpe1978]

Get a right-angle/60 degree angle low-clearance drill. Drill all the way through the built up column and bolt through and torque down (washers on both sides) with 1/2 or 3/8 dia through bolts. Then replace the drywall that was in your way.