Question

0u Slale Uhiversity A C- shaped weldup is to attach a tension p[ e to a gusset plare. If ut ven DL=55 k OT RL=65k CI) Please desion the thickness sia ー▽F<. A6 thate ns ton plate Use Aqgz steel LRFD weld to compleke the C-shgpedl 2 Use E to elee weld desian

Answer 1

1)tensiom due to dead load=55 kips

Tension due to live load=65 kips

Factored yension load=1.2*55+1.6*65=170 kips

Let thickness required be t

Yield strength=50 ksi

Width=6

0.9*6*t*50=170

t=0.629"

Provide 3/4 " thick plate

2)let weld length on two sides be L

Weld size=5/16 fillet

D=5

1.392*5*6+2*1.392*5*L=170

L=9.2"

Provide 10" long weld on each side of plate in addtion to the 6"long weld already shown in question