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  1. cmhski

    Ledger - Stud Wall Connection w/ Lags: Shear or Bearing?

    Hi Everybody, I am designing a deck w/ a 4000 lbf jacuzzi & 210 psf snow load. I end up having that each joist (@16" o.c.) bears on the 4x ledger (w/ hanger) with a total load of 1500 lbf. I want to use lags to connect the ledger to the 2x6 studs in the wall. Using the NDS ASD Table 11J (&...
  2. cmhski

    5/8" OSB Roof Diaphragm Allowable Shear

    Based on the gravity loads (Dead = 25 psf, Live = 16 psf, and Snow = 150 psf) and truss spacing = 16" o.c., the roof sheathing has to be 5/8" Str. 1 OSB. I have determined the shear demand for the roof diaphragm (when determining the seismic shear loading, the snow load can be reduced by a...
  3. cmhski

    Snow Drift loads in the Sierras

    I am trying to determine the drift loading for an attached deck, but my numbers using the UBC 97 Appendix 16 equations seem very high. Site info: Pg = 230 psf Pf = 161 psf Wb = 30 ft Width of deck = 10 ft hr = 8.5 ft (the deck is up against a gable wall with eave height = 8.5 ft & ridge height...
  4. cmhski

    Non-rectangular shear wall sections

    I am working on retrofitting the gable wall of an existing structure. It has a steep roof (11:12) and openings in the gable wall (windows, etc.). How do I determine the available amount of shear wall for the second story? Do I only include the sections with full height, or do I take an average...
  5. cmhski

    8000gal Water Tank Foundation Design

    OK, I know that there have been many similar threads, but I still do not think they answer my questions... I need to design a foundation for a water tank with the following info: Volume = 8000 gal Height = 20 ft Diameter = 9 ft Flat bottomed tank w/ 6 anchors Soil bearing capacity = 2000 psf...

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