N.M. Admin. Code § 14.7.2.29 - CHAPTER 21 - MASONRY

See this chapter of the IBC except as provided below.

A. Section 2111 - Masonry Fireplaces. See this section of the IBC except as provided below. Section 2111.5 - Seismic Anchorage. Delete this section of the IBC and substitute with the following: Two three-sixteenth-inch by one-inch (4.8 mm by 25.4mm) straps shall be embedded a minimum of 12 inches (305 mm) into the chimney with a 180-degree bend with a six-inch (152 mm) extension around the vertical reinforcing bars in the outer face of the chimney. Each strap shall be fastened to the structural framework of the building with two one-half-inch (12.7 mm) diameter bolts per strap. Where the joists do not head into the chimney, the anchor strap shall be connected to two-inch by four-inch (51 mm by 102 mm) ties crossing a minimum of four joists. The ties shall be connected to each joist with two 16d nails. As an alternative to the two-inch by four-inch (51 mm by 102 mm) ties, each anchor strap shall be connected to the structural framework by two one-half-inch (12.7 mm) diameter bolts in an approved manner.

B. Section 2113 - Masonry Chimneys. See this section of the IBC except as provided below. Section 2113.4 - Anchorage. Delete this section of the IBC and substitute with the following: Two three-sixteenth-inch by one-inch (4.8 mm by 25.4mm) straps shall be embedded a minimum of 12 inches (305 mm) into the chimney with a 180 degree bend with a six-inch (152 mm) extension around the vertical reinforcing bars in the outer face of the chimney. Each strap shall be fastened to the structural framework of the building with two one-half-inch (12.7 mm) diameter bolts per strap. Where the joists do not head into the chimney, the anchor strap shall be connected to two-inch by four-inch (51 mm by 102 mm) ties crossing a minimum of four joists. The ties shall be connected to each joist with two 16d nails. As an alternative to the two-inch by four-inch (51 mm by 102 mm) ties, each anchor strap shall be connected to the structural framework by two one-half-inch (12.7 mm) diameter bolts in an approved manner.

Notes

N.M. Admin. Code § 14.7.2.29

14.7.2.29 NMAC - Rp, 14.7.2.29 NMAC, 1-28-11, Adopted by New Mexico Register, Volume XXVII, Issue 21, November 15, 2016, eff. 11/15/2016, Adopted by New Mexico Register, Volume XXXIV, Issue 11, June 13, 2023, eff. 7/14/2023