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  1. SHEAR_FORCE

    Sistering to Undersized TJI Floor Joists

    We have a client who has undersized TJIs (older TJI 150s - out of warranty?) in their second-level living room floor. The joists were shown on the plans as being spaced at 12" OC but they were installed at 16" OC. The floor has ~2" of gypcrete with radiant tubes and is now sagging so they want...
  2. SHEAR_FORCE

    Rafter Notch at Supports in Snow Country

    I am hoping to have some corroboration or denial of a new outlook on birdsmouth/seat cut notches for rafters. The approach has always been a max notch of depth/4, which is currently supported in the Wood Frame Construction Manual (WFCM) 2.5.1.1.4. The 2018 NDS mentions in 3.2.3.2 that the...
  3. SHEAR_FORCE

    Strict Deflection Constraints w/ Heavy Snow Loading

    We are designing a two-story moment frame in a new home with the upper bay housing a Marvin Windows Ultimate patio door, with windows above. The 28' wide moment frame is supporting large roof snow loads of ~4200plf. It looks like all of the Marvin ultimate doors require an 1/8" max deflection...
  4. SHEAR_FORCE

    Back-to-Back Shearwalls

    Hello! I have a client who offered an unconventional concept for using two double-sided shearwalls back-to-back to form a high load shearwall (2 studwalls, 4 sheets of ply total). We are considering this for a an exterior wall application on the lower level of a three-story home, in lieu of a...

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