Community College of Allegheny County OCS Security Camera System Pittsburgh, PA
3.6
INSTALLATION OF CONCRETE HANDHOLES AND BOXES A. Reference Standards: 1. Precast Concrete Handholes: Comply with ASTM C891 unless otherwise indicated. 2. Consult Architect for resolution of conflicting requirements. B. Special Techniques: 1. Precast Concrete Handholes and Manholes: a. Install units level and plumb and with orientation and depth coordinated with connecting duct to minimize bends and deflections required for proper entrances. b. Unless otherwise indicated, support units on level bed of crushed stone or gravel graded from 1 inch (25 mm) sieve to No. 4 (4.75 mm) sieve and compacted to same density as adjacent undisturbed earth. c. Field-cut openings for conduits in accordance with enclosure manufacturer's published instructions. Cut wall of enclosure with tool designed for material to be cut. Size holes for terminating fittings to be used, and seal around penetrations after fittings are installed. INSTALLATION OF HANDHOLES AND BOXES OTHER THAN PRECAST CONCRETE A. Special Techniques: 1. Install handholes and boxes level and plumb and with orientation and depth coordinated with connecting duct, to minimize bends and deflections required for proper entrances. Use box extension if required to match depths of duct, and seal joint between box and extension as recommended by manufacturer. 2. Unless otherwise indicated, support units on level bed of crushed stone or gravel, graded from 1/2 inch (12.5 mm) sieve to No. 4 (4.75 mm) sieve and compacted to same density as adjacent undisturbed earth. 3. Elevation: In paved areas and trafficways, set cover flush with finished grade. Set covers of other handholes 1 inch (25 mm) above finished grade.
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END OF SECTION 260543
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