When a soil test(blows per foot) is used to determine an allowable bearing pressure for design at a certain depth below grade in sandy soil, does the weight of the soil and foundation above the bearing level need to be subtracted from the design value? My understanding is that no reduction for...
I need to support a solar panel array (120 SF) on an embedded concrete pier. Wind loads are 100 mph, exp B. I want to use procedure for signs in ASCE 7-05.I want to use a 36" diameter pier embedded into 11-65 soil about 9 feet to keep it above water. The height of the pole above grade is 24'...
Due to drift loads and point loads, we specified special open web bar joists on a project with detailed load diagrams. The joist manufacturer supplied shop drawings for these joists with the load diagrams as shown on our plans. They will not provide signed and sealed drawings. how do we insure...
For seismic analysis using equivilent force method per IBC, the base shear is distributed vertically using equations involving the weight at each floor x the height / sum of the weight x height for all floors. For a single story slab on grade building, this results in 100% of the base shear...
I have ordered the SJI guide for bridging design. I was wondering if anyone had any comments or thoughts on my approach to determining the bottom chord bridging spacing, since it is conservatively based on the maximum compressive load in the bottom chord assuming it is constant along the chord...
I am evaluating existing roof joists that will be subjected to large net uplift loads due to inclined solar panel arrays being attached on the roof. I calculated the axial compressive stress in the bottom chord,the lateral r value of the double angle bottom chord, and determined a KL/r value for...
I have an existing unreinforced exterior wall composed of 8" cmu and 4" brick. The wall is cracked on the interior face, most likely due to flexural overstress due to wind loads. The owner would like to reinforce the wall. Anyone have any experience with the use of polymer fabric reinforcement?
Anyone come across a good textbook based on the new AISC Steel manual, 13th edition. It would be helpful to have a textbook using same nomenclature and criteria
How can you pour a slab under the wall without disturbing the stone rubble foundation? That is why I thought the chemical grout could be used to stabilize and support the wall in order to allow the undepinning to proceed
I am working on a 150 year old building with perimeter stone rubble foundation walls supporting wall and roof load and first floor framing over a crawl space. The owner wants to add a full basement. I am worried about the stone rubble foundation falling apart during underpinning procedure. I am...
