Masonry Magazine August 2010 Page. 27
Compared to traditional AMSMV installation practices, the products and installation methodology utilized and understood by dimensional stone installation companies are well suited to the installation nuances and requirements of AMSMV. The following discussion will help us to see why this is the case.
Building code considerations
AMSMV falls under the auspices of Chapter 14 Exterior Walls in the 2009 International Building Code (IBC). In addition, further prescriptive requirements of exterior adhered veneer fall under the auspices of Chapter 6 of the Building Code Requirements for Masonry Structures TMS 402-08/ACI 530-08/ASCE 5-08; namely section 6.3-Adhered Veneer. The prescriptive requirements for exterior applications under the code are as follows:
* Units shall have a minimum thickness of 1/4-inch (6mm (see Table 1405.2-Minimum Thickness of Weather Coverings-Chapter 14-Exterior Walls - 2009 IBC) and shall not exceed 2 5/8-inch (66mm) thickness
* Units shall not exceed 36 inches (914mm) in any face dimension.
* Units shall not exceed more than 5ft² (0.46m²) in total facial area.
* Units shall not weigh more than 15 pounds per ft² (718 Pa) (interior units can weigh up to 20 pounds per ft³ (0.958 kg/m²)].
* Units that weigh less than 3 pounds per ft² (143 Pa) shall not be limited in facial dimensions.
* Adhesion developed between the substrate and the adhered veneer shall be a minimum of 50 psi (345 kPa).
The 2009 IBC also dictates that backing structures shall be designed to meet the deflection standard of L/600 under
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