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R703.8.3.2 Maximum Span
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The allowable span shall not exceed 18 feet 3 inches (5562 mm) and shall be constructed to comply with Figure R703.8.3.2 and the following:
For SI:1 inch= 25.4 mm, 1 foot= 304.8 mm.
- Provide a minimum length of 18 inches (457 mm) of masonry veneer on each side of opening as shown in Figure R703.8.3.2.
- Provide a minimum 5-inch by 3 1/2 -inch by 5/16-inch (127 mm by 89 mm by 7.9 mm) steel angle above the opening and shore for a minimum of 7 days after installation.
- Provide double-wire joint reinforcement extending 12 inches (305 mm) beyond each side of the opening. Lap splices of joint reinforcement not less than 12 inches (305 mm). Comply with one of the following:
3.1. Double-wire joint reinforcement shall be 3/16-inch (4.8 mm) diameter and shall be placed in the first two bed joints above the opening.
3.2. Double-wire joint reinforcement shall be 9 gauge (0.144 inch or 3.66 mm diameter) and shall be placed in the first three bed joints above the opening.
- Provide the height of masonry veneer above opening, in accordance with Table R703.8.3.2.
|MINIMUM HEIGHT OF MASONRY
VENEER ABOVE OPENING (INCH)
|MAXIMUM HEIGHT OF MASONRY
VENEER ABOVE OPENING (FEET)
|24||5 to < 12|
|60||12 to height above support
allowed by Section R703.8
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