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I have a single story house with fire damage that started in the wall electrical panel. The manufactured wood trusses in the attic space are approximately 30 feet long and spaced at 2' on center. I see lots of smoke damage to the top chord and web members of the trusses, but no smoke damage...

I have a one-story building with concrete-slab floor on grade, with carpet flooring. The slab is approximately 40-years old. Recently one corner of the concrete-slab floor (by the exterior walls) shows sign of surface delamination/flaking. Any idea what may cause that after...

Thanks for the info. Yes the pipe has 45 and 90 turns. I will use the same equation but with some questions: 1. Is the Area of the pipe, inside or outside diameter of the pipe? 3. Is the water pressure A in the formula, actual working water pressure inside of the pipe? 4. Any factor of safety...

I have a new 14" (ID) ductile iron potable water pipe hanging from the bridge structure. The pipe is approximately 600' long, relatively horizontal, working water pressure is 100 psi, 1500 gpm (max). The pipe will be installed in the snow country. I need to design thrust block for the pipe...

I am looking for pdf copy of old "2001 California Building Code". Any idea where I can find it? Thanks

I am using a 14" diameter galvanized steel pipe for potable water design. The pipe is exposed and hanging from the concrete bridge overhang. The pipe line is approximately 600 linear foot and water pressure inside of the pipe is 250 psi. The job requires that the pipe to be made in USA. I do...

I am looking for wind load acting perpendicular to water pipe line hanging from the bridge overhang. ASCE 7-10, is not clear about the equation and the coefficients to be used for the elements of the structure (pipe line). Any idea what equation to be used from ASCE 7-10? I was not able to...

Hi: Thanks Bridgebuster for the drawing. Yes I am proposing to hang the pipe from rods embedded in the deck. Thanks everybody for the help.

I am looking for design example/criterial for design of large diameter steel water pipe hanging from the bride soffit, for vertical and lateral loads.

Hi: I am working on an old project and they have classified the soil as "Cemented Soil" under the foundation of the building. Table No. 29-B of the Uniform Building Code does not list the "Cemented Soil" in the table. I was wondering what soil class I can use for the allowable foundation...

For this size of slab, is the subgrade reaction modulus so critical? Generally settlement under a slab of this size is uniform, no matter the degree of settlement.

I am designing concrete pad for a large metal water tank. The water tanks is 65,000 gallons capacity and has 21 feet diameter. The total load of the tank, water and concrete is approximately 700 kips. I am using 12 inches thick by 25 feet square concrete slab pad to support the tank. For the...

JAE: Assuming soil subgrade is stiff, are there any sample calculation that I can follow?

Yes the local code calls out for 4" thick unreinforced slab, 2500 PSI

There is a soils report for the property and calls out of 1000 PSF soil bearing pressure. The 1000 PSF soil bearing pressure applies to the house and the driveway.

This is a 4” thick concrete slab on grade residential driveway of the garage. I have large cracks in the driveway slab. I am looking for sample calculation to use to determine if the delivery truck driving into the driveway had caused the cracks in the slab. I have the weight of the truck...

Thanks Can polyurethane injection be used to lift the exterior wall foundation of a house (approximately one inch)? The vertical gravity load on the exterior wall foundation is approximately 1000 pounds per square foot.

I am working on a one-story structure on concrete-slab floor in California. A portion of the foundation and the concrete-slab floor has settled and some of the walls have developed cracks. We are planning to raise the foundation and the concrete-slab floor (approximately 2 inches) to stabilize...

Thanks

Hi: Thanks for your help. Actually I was looking for the code section about the requirement for the 10 psf. I could not find the 10 psf requirement in the 1976 or 1979 UBC. Any idea what part of the code it might be?