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D. Examine walls, floors, roof, and plumbing chases for suitable conditions where piping and specialties are to be <br /> installed. <br /> E. Review soil testing information provided to verify conditions are suitable for piping installations. <br /> F. Do not proceed until unsatisfactory conditions have been corrected. <br /> 3.02 PREPARATION OF FOUNDATION FOR UNDERGROUND BUILDING DRAINS <br /> A. Grade trench bottoms to provide a smooth,firm,and stable foundation,free from rock,throughout the length of the <br /> pipe. <br /> B. Remove unstable, soft, and unsuitable materials at the surface upon which pipes shall be laid, and backfill with <br /> clean sand or pea gravel to indicated invert elevation. <br /> C. Shape bottom of trench to fit the bottom%:of the circumference of pipe. Fill unevenness with tamped granular sand <br /> backfill. At each pipe joint dig bell holes to relieve the bell of the pipe of all loads, and to ensure continuous <br /> bearing of the pipe barrel on the foundation. <br /> 3.03 JOINING PIPES AND FITTINGS <br /> A. Cast-Iron Soil Pipe: Make compression joints and hubless joints in accordance with the recommendations in the <br /> CISPI Cast Iron Soil Pipe and Fittings Handbook,Chapter IV. <br /> B. PVC DW V Pipe: Joining and installation of PVC drainage pipe and fittings shall conform to ASTM D2665. <br /> 3.04 INSTALLATION <br /> A. Refer to Section 15050"Basic Mechanical Materials and Methods",for general piping installation instructions. <br /> B. Install supports and anchors in accordance with Section 15050 "Basic Mechanical Materials and Methods" and <br /> Section 15140"Supports and Anchors". <br /> C. Make changes in direction for drainage and vent piping using appropriate 45-degree wyes,half-wyes,or long sweep <br /> quarter, sixth, eighth, or sixteenth bends. Sanitary tees or short quarter bends may be used on vertical stacks of <br /> drainage lines where the change in direction of flow is from horizontal to vertical. No change in direction of flow <br /> greater than 90 degrees shall be made. Where different sizes of drainage pipes and fittings are connected, use <br /> proper size,standard increasers and reducers. Reduction of the size of drainage piping in the direction of flow is <br /> prohibited <br /> D. Install underground building drains to conform with plumbing code,and in accordance with the Cast Iron Soil Pipe <br /> Institute Engineering Manual. Lay underground building drains beginning at low point of systems, true to grades <br /> and alignment indicated with unbroken continuity of invert. Place bell ends of piping facing upstream Install <br /> required gaskets in accordance with manufacturer's recommendations for use of lubricants, cements, and other <br /> special installation requirements. Maintain swab or drag in line and pull past each joint as it is completed <br /> E. Install building drain pitched down at minimum slope of 1/4" per foot(2 percent) for piping 3" and smaller, and <br /> 1/8"per foot(1 percent)for piping 4"and larger,or as indicated on plans. <br /> F. Extend building drain to connect to sewer piping, of size and in location indicated for service entrance to building. <br /> Sewer piping is specified in a separate section of Division 2. <br /> G. Install sleeve and mechanical sleeve seal at penetrations through foundation wall for watertight installation. <br /> 15413-4 No.99132-CP2 <br />