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B. Contractor shall be responsible for proper sizes and locations of • <br /> foundations, pads, anchor bolts, louvers, and other items to be built <br /> into structure. � <br /> ! <br /> 2.3 FASTENINGS TO STRUCTURES ' <br /> A. Provide structural fastening devices for equipment,materials, <br /> piping and ductwork. Devices shall be concrete inserts, expansion <br /> shields and lag bolts, through bolts-washers-nuts. All bolted <br /> devices shall use jamb nuts. Inserts shall be continuous type ec�ual <br /> to Unistrut Corporation Series P3200 for beams and P3300 foi <br /> floor and roof slabs, installed per manufacturer's recommendations <br /> in lengths to suit specific application, complete with spring nuts, <br /> end caps, and plastic coated filler to prevent concrete seepage� <br /> � <br /> B. Use of power drive "shot-pins" is permitted only for ducts 20'� in <br /> width and smaller and single pipes 1" and smaller. � <br /> � . <br /> 2.4 ACCESS PANELS <br /> A. Furnish ceiling and wall access panels for installation by othei <br /> Divisions. Contractor shall be responsible for coordination ofl <br /> locations so panels will provide proper access to equipment served. • <br /> Minimum size: 18" x 18". � <br /> I <br /> B. Doors shall be Inryco/Milcor or equal by Bilco. Doors shall be <br /> constructed of 14-gauge steel. Frame shall be constructed of 16- <br /> gauge steel. Doors to have screwdriver-operated locks. Finish shall <br /> be prime coat of rust-inhibitive paint. Doors shall be equal to the <br /> following types: � <br /> 1. Milcor Style A for lay-in tile ceilings. <br /> 2. Milcor Style M for exposed masonry walls. � <br /> 3. Milcor Style AP for plastered ceilings and walls. <br /> 4. Milcor Style M with stainless doors for ceramic tile or <br /> glazed structural tile. <br /> 2.5 PREFABRICATED ROOF CURBS <br /> A. Prefabricated metal roof curbs shall be used at all roof penetr�ations <br /> and for support of HVAC units, duct openings, pipe penetrations, � <br /> fans and other mechanical roof mounted equipment. Curbs shall <br /> i <br /> ICT 99184 i <br /> 15050 -2 � <br /> i <br />