10 02/18 Method D). For trenches excavated in roads, streets, or located under structures, place backfill in 6-inch layers to top of trench and compact each layer to at least 95 percent maximum density (ASTM D1557, Method D). FLANGED JOINTS: Flanged joints shall be faced true, provided with gaskets, and made perfectly square and tight. FIELD CUTTING PIPE TO A SPECIFIC LENGTH Determine the exact length of carrier pipe needed. Mark the casing at this point. Measure back 6 inches on both sides and mark the casing at these points using a wrap-around. Use a fine-tooth carpenters handsaw or PVC saw to cut the PVC or HDPE casing. Remove the casing and cut off the insulation. Be careful not to damage ductile iron carrier pipe during this operation. See illustration below. Mark, cut, and bevel the Ductile Iron pipe at the desired length. Remove any burrs. Make sure cut is square. Thoroughly clean all insulation from the spigots. Remove the insulation between the casing and the carrier pipe to a distance of one inch. Insert the rubber end seal between the casing and the carrier pipe using the handle of a hammer or screwdriver to push the seal all the way. Silicone caulking may be used in lieu of the rubber end seal.