city of charlottetown tender 2012 storm pipe construction package b ...

City of Charlottetown Section 33 44 00May 2012Storm Sewer2012 Storm Pipe Construction, Package B Page 4 of 5.10 Joints:.1 Corrugated steel pipe:.1 Install gaskets as indicated..2 Match corrugations or indentations of coupler band with pipe sections beforetightening..3 Tap coupler firmly while tightening, to take up slack and ensure snug fit..4 Ensure bolts are inserted and tightened..2 Concrete, clay and asbestos cement pipe:.1 Install gaskets as recommended by manufacturer..2 Support pipes with hand slings or crane as required to minimize lateral pressure ongasket and maintain concentricity until gasket is properly positioned..3 Align pipes before joining..4 Maintain pipe joints free from mud, silt, gravel and other foreign material..5 Avoid displacing gasket or contaminating with dirt or other foreign material. Removedisturbed or dirty gaskets; clean, lubricate and replace before joining is attempted..6 Complete each joint before laying next length of pipe..7 Minimize joint deflection after joint has been made to avoid joint damage..8 Apply sufficient pressure in making joints to ensure that joint is complete as outlinedin manufacturer's recommendations..9 Mortared joints:.1 Pipe interior: circular pipes 700 mm diameter and larger, and arch or ellipticalpipe equivalent to 900 mm diameter or larger shall have interior gap betweenends of adjacent pipes filled with mortar. Apply mortar minimum 7 days afterbackfilling has been completed to allow pipe settlement to occur. Finish interiorsurface of joints smooth..2 Pipe exterior: for bell and spigot pipe, use mortar to seal outside of joints. Pressand bed mortar into place. Allow mortar to set minimum of 1 h before backfilling..11 When any stoppage of work occurs, restrain pipes as directed by Engineer, to prevent "creep"during down time..12 Plug lifting holes with Engineer approved prefabricated plugs, set in shrinkage compensating grout..13 Cut pipes as required for special inserts, fittings or closure pieces, as recommended by pipemanufacturer, without damaging pipe or its coating and to leave smooth end at right angles to axisof pipe..14 Make watertight connections to manholes and catch basins. Use shrinkage compensating groutwhen suitable gaskets are not available..15 Use prefabricated saddles or approved field connections for connecting pipes to existing sewerpipes. Joint to be structurally sound and watertight..16 Temporarily plug open upstream ends of pipes with removable watertight concrete, steel or plasticbulkheads.