I have a project with an existing lightweight concrete (3000 psi) slab on metal deck on steel beams. The existing slab has 2 large areas of depressed slabs. One is a 2" depressed slab (11,000 ft^2) and the other is a 3/4" depressed slab (2500 ft^2). Currently there is tile and grout in the...
Will painting steel and aluminum prior to fastening them together with stainless steel screws prevent a galvanic reaction? This will be used for an exterior canopy. Or should a separation tape be used. Thanks.
I have a two story school I am designing that is apperoximately 320'x100'. The structure is masonry loadbearing walls at the perimeter and along the interior corridor which runs down the middle of the building parallel with the 320' exterior walls. The second floor is metal joists with...
My question is if I can use knee bracing in SDC 'C'? I would be using and R=3 (structural steel systems not specifically detailed for seismic). The knee braces would be used in one direction only with both the brace to beam and brace to column connections being about 5 feet from the...
I am designing a building which has part of the second floor as a balcony over an enclosed space. The Architect is showing the balcony as my composite deck and slab system with a waterproofing membrane and an unbonded topping slab on top of this which slopes to a drain. I was going to make the...
I have a 1 story building. Bar joists bearing on steel girders. The steel columns are HSS6x6 and are infilled with 6" light gage studs at 16"oc. The owner wants the lateral bracing to be strap bracing. I want to weld strap x-bracing to the outside face of the columns to take the lateral...
Does anyone have information on Robertson QL-21-20 floor deck. I am checking a floor which was built in the late 60's, early 70's. I know that the deck is 3" deep with 2 1/2" concrete on top of that. I need to know the span ratings and the profile of this deck. Any help would be appreciated...
