Community College of Allegheny County OCS Security Camera System Pittsburgh, PA
work, or to his work or to the work of any other Contractor, shall be repaired at his expense to the Engineer’s satisfaction.
3.6
CONCRETE BASES
A. General: Install concrete pads and bases as indicated and as required for all new equipment under this contract. B. Forms and Reinforcing Materials 1. Form concrete pads with framing lumber with form release compounds. Chamfer top edge and corners of pad. Anchor or key to floor slab. 2. Install reinforcing bars where required, tied to frame, and place anchor bolts and sleeves to facilitate securing units. C. Mounting: Anchor electrical equipment and other system components on concrete housekeeping bases. Provide anchorage according to manufacturer's written instructions, unless otherwise indicated. 1. Concrete Pad: Housekeeping bases shall be 4" high with 1" chamfer edges minimum and shall extend 4" beyond the edge of the electrical equipment on all accessible sides unless indicated otherwise. Coordinate size of equipment with actual unit size before proceeding with any formwork. 2. Clearance: Maintain minimum workspace around components according to manufacturer's Shop Drawings and National Electrical Code. D. Concrete: Place concrete and allow to cure before installation of units. Use Portland cement that conforms to ASTM C 150, 4000 psi, 28-day compressive strength, and normal weight aggregate.
3.7
SLEEVE-SEAL INSTALLATION
A.
Install to seal exterior wall penetrations.
B. Use type and number of sealing elements recommended by manufacturer for raceway or cable material and size. Position raceway or cable in center of sleeve. Assemble mechanical sleeve seals and install in annular space between raceway or cable and sleeve. Tighten bolts against pressure plates that cause sealing elements to expand and make watertight seal.
3.8
FIRESTOPPING
A. Apply firestopping to penetrations of fire-rated floor and wall assemblies for electrical installations to restore original fire-resistance rating of assembly. Firestopping materials and installation requirements shall be U.L. listed systems.
260500-25
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