A pre-manufactured mechanical unit curb bears directly on a wide-flange joist or framing member and roof deck sized per plan. The mechanical unit sits atop the curb per architectural and mechanical drawings, restricted to units with a weight of 500 pounds or less. Framing details and roof deck requirements follow structural and architectural specifications.
WF JOIST PER PLAN - L FRAME SIM ROOF DECK PER PLAN PRE - MANUFACTURED CURB PER MECH UNIT MFR TYPICAL MECH UNIT SUPPORT UNIT WEIGHT 500 LB OR LESS MECH UNIT PER ARCH/ MECH DWGS
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