We have a floor system that consist of 3” 18 Gage Deck with 2 ½” LW concrete slab for a total thickness of 5 ½”. The architect has requested to install ½” ID radiant piping in the floor system. I am not sure exactly what the spacing of these pipes are, but after doing a little research, it...
We are relocating a building in which a slab on grade is going to become and elevated slab. The building mover is proposing a system of masonry piers 24" SQ spaced at 4'-0" OC each way to sit the new slab on. They will grout beneath the bearings at the piers to ensure direct bearing. They...
I posted this under the geotech section by accident. Please don't scold for reposting...........
A friend of mine is about to build a house. He has a basement that is fully buried on one side, about half of the side walls are buried, and the rear is completely exposed. I have a couple of...
A friend of mine is about to build a house. He has a basement that is fully buried on one side, about half of the side walls are buried, and the rear is completely exposed. I have a couple of questions.
1. What construction is better, CMU or Concrete? Obviously the Concrete is more...
I know i have to check uplift on the beam, that isn't what I am unclear about. What im unclear about is it better to beef the beam up in size or brace the bottom flange of the beam with the truss bottom chord?
Ok,
So i ran the numbers for a 28'-0" full unbraced W16x26 for for 700 lbs of uplift at each truss (350 P/F). A W16x40 can handle this load fully unbraced and the deflection is fine.
I guess i just wanted to know is this looked down upon since the beam design tables stop at a certain unbraced...
Blake,
I have not calculated this yet b/c we are in preliminary stages of design. I do know the beam will go into uplift. Estimate at approximate 700 lbs ea truss and trusses are spaced at 2 feet OC
I have a condition where i have a roof that consists of perimeter steel beams with timber trusses bearing on these beams. For gravity loads, a W16x26 works for strength and deflection. When this beam goes into uplift, the bottom flange is completely unbraced for the entire length of the...
Does anyone know a good reference for transformed section properties of a concrete filled HSS? I know the LRFD manual gives design values for compressive loads. Any help would be greatly appreciated. Thanks in advance.
I checked with the Geotech and he said that I must include the weight of the soil in my bearing calculations. He said that he would have to provide helical piers to handle the load. I don't think this is logical. If you are determining an effective bearing pressure you subtract any overburden...
I have a situation where I have a foundation/retaining wall. The wall is 16' tall and is retaining 13'10" of soil on the one side. On the other side, the grade is sloping and at a particular location is 9'-6" above the top of the footing. I have a 100PSF surcharge load on the side the soil is...
I have a situation where I have a foundation/retaining wall. The wall is 16' tall and is retaining 13'10" of soil on the one side. On the other side, the grade is sloping and at a particular location is 9'-6" above the top of the footing. I have a 100PSF surcharge load on the side the soil is...
