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  1. cobadger

    Base shear part of foundation design?

    I haven't had to do a seismic SDC D structural review in a while and would like some clarification. I am having another PE review the drawing, so I have some help there. That being said, I am reviewing a 1.5 story log house. It's rectangular with a 10' poured foundation, though the house has...
  2. cobadger

    Residential found. wall design with extreme lateral load

    I am engineering a house with a 10' tall, poured, basement walls. The soils engineer has indicated a equivalent lateral fluid pressure load of 81psf. The bearing pressure is given as 3100psf. Expansive clay has not been found...according to the soils report. It seems odd to have such a...
  3. cobadger

    Cold joint in a foundation wall?

    I have a client that wants to place a cold joint in a foundation wall. It's a residential structure and the foundation is being constructed with ICF's. The builder is worried about blow-out at the bottom of the forms as some of the walls are 11' tall. His concern seems legitimate, though I...
  4. cobadger

    Structural Slab

    I am designing a structural slab to support a self contained hot-tub. The property has a significant slope and in order to have the tub at the same height as the deck, an "mini foundation" has to be poured. The walls are 9 feet tall and the "foundation" is 15' square. The home owner wants to...
  5. cobadger

    steel plate timber connector

    I am engineering a log house with a large covered porch. The porch roof is supported by 12x12 timber posts, which supports a 10x12 timber header laid flatwise. I need to created a moment connection between the post and header for lateral resistance, but can not use knee bracing (per...
  6. cobadger

    Recommended references for expanding clay soils

    Does anybody have any recommended references for foundation design with expanding clay type soils? The design I am working on is residential. Any thoughts regarding design in this type of soil would also be appreciated. thank you, Alex
  7. cobadger

    Notched timber beam capacity

    I am checking the design of a simply-supported, notched timber purlin and need some advice. Based on the NDS section 3.4.3.2, I have calculated the shear capacity of the notch, which is on the tension side on each end of the beam. This calculation yields of capacity of 1402 pounds. If I...

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