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...
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 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:
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...
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...
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...
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...
This building is built in 1979 and has manufactured roof wood trusses. I am looking for the required ceiling or attic space live load at the time of the construction. The building is built per 1979 uniforhttp://www.eng-tips.com/m building code. There is no storage load in the attic space.
This question is about an architectural (20' tall) post at the front of the building. Generally, if the post is a structural component of the building, then we design the post to support the gravity load plus any lateral load. In case, if the post is only for architectural reason and does not...
I have an existing 5 1/8" wide roof glue-laminated beam. I need to connect a 2x8 joist to the end of the glue-laminated beam (cantilever end of the beam). I am using the joist hanger from the Simpson (MUS28). My concern is that the nails are very close to the edge of the glue-laminated beam...
I had specified L2x2x3/16 angle bracing for a very small (12" wide x 12" tall) bracing system. The length of the brace is 13" The shop has fabricated the bracing system with L2x2x1/8. I checked the allowable load and L2x2xx1/8 is still satisfactory to resist the load. My question is the AISC...
Under UBC the maximum allowable soil bearing pressure was 1000 psf (without the need for soils report). Under CBC 2013, TABLE 1806A.2, the same soil bearing pressure is 1500 psf. The same Dead load + Live load governs the design, using the working stress design. Any body know what was the...
For one story hour with a roof mean height of 15', gable end wall system, roof pitch 4:12, wind 85 mph, exposure C, I am getting 32 psf wind uplift for the roof ridge beam. I need this load for the code load combination system to design the ridge beam. Any body has any idea why the uplift wind...
Does anybody has a detailed calculation for roof wood ridge beam design example, incorporating all the load combinations from the California Building Code?goodmantoo@comcast.net
I have a roof ridge beam that spans 27' with tributary width of 10.5'. The house is one-story and the roof height at the ridge is 15'. The wind has exposure C with 85 mph wind. Based on the ASCE tables, the down wind load is 7 psf and the upward wind is 32 psf. I am getting a high uplift at...
