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I-, <br />* <br />h <br />\^4 <br />* <br />'ftmu <br />3.02 <br />A. <br />3.03 <br />A. <br />B. <br />C. <br />3.04 <br />A. <br />3.05 <br />A. <br />4"' 9*7-1/2*4-1/2 <br />6"10*9*5* <br />8"11*9-1/2**5-1/2 <br />10" <br />’ HANGER <br />12* <br />AND SUPPORTS <br />10*6’. <br />Ductwork shall be substantially supported with hangers to <br />ceiling or otherwise, depending upon local conditions, placing <br />supports according to recommendations of SMACNA along entire <br />length of duct. All hangers shall be made of heavy 1" wide <br />strips riveted or bolted to sides of ducts. Upper ends of <br />hangers to be securely fastened to ceiling or masonry by <br />means of expanion bolts. No wood plug driven in masonry <br />will be permitted. Punching of holes in any way will not <br />be allowed. No nails, wires or cotter pins shall be run <br />through ducts. All necessary hangers, braces, tees, angles <br />and supports will be provide and secured in a satisfactory <br />manner. Vertical ductwork shall be supported at each floor. <br />BRACKETS, BRACES AND SUPPORTS <br />Furnish and install brackets, braces or reinforcing angles <br />as may be required in all partitions, not sufficient in them­ <br />selves to support wall mounted equipment included in this <br />specification. <br />No equipment shall be supported by the piping system itself. <br />All units shall be supported in a manner to allow service <br />without removing large piping segments or valves. Provide <br />structural members as required. <br />On brick, masonry block, hollow tile or concrete walls not <br />finished on opposite side of wall, use brass toggle bolts <br />or 3/8" brass bolts extending at least 3" into wall secured <br />in place by molten lead run in around the bolt and caulked. <br />EQUIPMENT SUPPORTS <br />Foundations, supports, anchors, concrete cover, anchor bolts, <br />sleeves, grouts, shims, etc., required for properly placing <br />mechanical equipment furnished under this contract shall <br />be provided by this Contractor, unless specifically stated <br />otherwise. <br />EXPANSION LOOPS, GUIDES AND ANCHORS <br />Piovide and install expanion loops, guides and anchors as <br />required, shown or specified to handle all thermal expansion <br />and contraction in piping systems. The loops shall be made <br />of dimensions shown or fabricated with long radius elbows <br />and piping of maximum lengths that space permits where dimen­ <br />sions are not given. Loops shall be installed with "cold <br />springs" so that loop in operation will have approximately <br />equal contraction and expansion from fabricated position. <br />15090-4