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Building Design and Construction Handbook - Merritt - Ventech!

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11.18 SECTION ELEVEN<br />

FIGURE 11.9 Anchorage of walls to structural framing: (a) hollow-wall ties to a structural<br />

steel beam; (b) masonry veneer wall anchored to a structural steel column; (c) masonry<br />

veneer wall anchored to a reinforced concrete beam; (d) hollow wall anchored to a concrete<br />

corner column.<br />

11.8e are shown in Fig. 11.9c <strong>and</strong> d. Wires in these anchors should be at least 6<br />

ga <strong>and</strong> should be spread to a width of at least 4 in for embedment at least 2 in into<br />

bed joints in the wall. The flat-bar type (Fig. 11.8f ) should have a minimum thickness<br />

of 16 ga <strong>and</strong> width of 7 ⁄8 in. The end to be embedded in a bed joint should<br />

be turned upward at least 1 ⁄4 in.<br />

11.5 CHIMNEYS AND FIREPLACES<br />

Minimum requirements for chimneys may be obtained from local building codes<br />

or any model building code. In brief, chimneys should extend at least 3 ft above<br />

the highest point where they pass through the roof of a building <strong>and</strong> at least 2 ft<br />

higher than any ridge within 10 ft. (For chimneys for industrial-type appliances<br />

with discharge temperatures between 1400 <strong>and</strong> 2000�F, minimum height above the<br />

roof opening or any part of the building within 25 ft should be 10 ft. For discharge

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