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Load on King Stud/Jack stud

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pdev67

Civil/Environmental
Sep 22, 2018
33
Hi There, just doing practice for calculating load on Jack and king studs in tall wall. As per attached sheet,
Load on king studs(one side) - from the tributary (half the stud spacing(6") + half of the opening width (18")) plus wind load (18psf) that is 1500plfx24" (= 3000lb) + 18psfx24" (= 36 plf along the length)
Load on jack stud (one side) from header beam - from tributary (half of the opening width (19.5")) that is 100psfx19.5"x123"=1666lb
assuming roof load 1500plf, wind load 18psf and wall load 100psf,
please advise
 
 https://files.engineering.com/getfile.aspx?folder=e8fcc864-0f73-4781-8f48-f191ef6a38d6&file=tall_wall_exmp.pdf
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Your wind load calc appears to be a little convoluted. I would have just when with Trib Width = 1/2*(12"+ 39") = 25.5" = 2.125'. Applied wind load = 2.125'x18psf = 38plf. Your trib width for the wind load used the clear opening of the door where you should have been using the distance between your king studs.

Your assumed roof load didn't come into play anywhere in your calculation.

Aside from that - your wind load appears to be low for design of wall studs (might be appropriate for your location), and your wall dead load of 100psf is way too high for typical residential. Should be more in the neighborhood of 25psf.
 
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