Brackets are sized for a maximum duct length of 3.7 meters and must be positioned directly against the wall or within a maximum distance of 50 millimeters away from it. Each wall anchor must satisfy specific design criteria unless a separate analysis is provided, including a tensile load equal to 3/8 of the duct weight with a safety factor of 4, and a shear load equal to 1/2 of the duct weight with a safety factor of 4.
ANCHOR (HANGER) NOTES: 1. BRACKETS ARE SIZED FOR 3.7 m OF DUCT, MAXIMUM. 2. LOCATE DUCTS AGAINST WALL OR MAXIMUM OF 50 mm AWAY FROM WALL. 3. EACH WALL ANCHOR SHALL SATISFY THE FOLLOWING CRITERIA UNLESS OTHER ANALYSIS IS MADE: A. TENSILE LOAD = 3/8 x DUCT WEIGHT; SAFETY FACTOR 4. B. SHEAR LOAD x 1/2 x DUCT WEIGHT; SAFETY FACTOR 4.
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