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rat run

  1. R

    Metal alternative for 2x4 truss rat runs when penetrating 1 hour fire wall

    I have 2x4 permanent truss bracing at the bottom chord (rat runs) that penetrate 1hour drywall tenant separation walls (and the inspector won't pass it with wood penetrating). Has anyone ever used any type of steel/ metal beams instead of 2x4s in certain areas? Or has anyone every built a metal...
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