15.04.310 Subsection R602.6.1 Amended – Drilling and notching of top plate.
Subsection R602.6.1 of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows:
R602.6.1 Drilling and notching of top plate. When piping or ductwork is placed in or partly in an exterior wall or interior load-bearing wall, necessitating cutting, drilling or notching of the top plate by more than fifty percent (50%) of its width, a galvanized metal tie not less than 0.054 inch thick (16 ga) and one and one-half inches (1½”) wide shall be fastened across and to the plate at each side of the opening with not less than four 10d (0.148 inch diameter) nails having a minimum length of one and one-half inches (1½”) at each side or equivalent. The metal tie must extend a minimum of six inches (6") past the opening. See Figure R602.6.1.
Exception: When the entire side of the wall with the notch or cut is covered by wood structural panel sheathing.
(Ord. 12-42 § 2, 2012.)