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I have to designed an enclosed control room (15') to withstand a 3psi load with a duration of 40ms. After entering my inputs for a masonry wall with #5 bar in every cell filled with grout the program tells me it works (incident angle < 2 degrees). My gut tells me this is inadequate. Anyone...

Per the AISC, members W14x145 - W14x730 have a 3 - 7 1/2 - 3 workable gage. Does this indicate the spacing of 4 bolts on the flange? Also, are you required to use 4 bolts? If not, what gage do I use? Thanks,

Hi, I have a 180 foot stack, with total vertical load of 350 kips. There is a 10 inch grout circle around the anchor bolts and the vessel is 15 feet in diameter. My question is how to design the shim plates to level it. Do I put them midspan of the bolts or on each side of the bolt? Thanks,

How close can I drill to an underground duct bank with auger cast piles? Thanks,

What is the bearing area Abrg of a 3 inch bolt. Also where did you find the information?

Suppose I have a column 30 feet with a beam coming in at 15 feet with a knee brace 5 feet down connected to beam from the column. Would my unbraced length for the column be 10 or 15 feet? Thanks