1925 (#1403-1607) - Laserfiche WebLink

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; Main sewers will be measured horizontally from center to center of structures, along the center llne of the sewer, including all specials. House connection sewers will be measured horizontally from center of the main sewer to the upper end of the house connection sewer. Unless otherwise qualified by conventional signs, all distances, frontages and elevations shown on said plans, profiles or other drawings, are in feet. ~ECTION 6. PIPE JOINTS. (a) CEMENT MORTAR JOINTS. Unless otherwise specified the entire annular space in all pipe joints between the exterior of the spigot and the interior of the socket shall be completely and carefully filled with cement mortar of the composition specified in Section ? heren/. The mortar shall then be neatly beveled off from the outer edge of the hub or socket to the sides of the pipe, special care being used to secure good work at the lower part of the joint. The joints of all pipes, fifteen (15) inches and over in diameter, shall be carefully pointed ~md wiped on the inside, and all pipes under fifteen (15) inches in diameter shall be carefully wiped on the inside. No joints shall be entirely cemented until the next two (2) joints in advance are laid. When water is found in the trench, a fiat oakum strand of proper size dipped in neat cement grout may be laid in the lower part of the socket before the next pipe is inserted . A g~sket of oakum twisted into strands may then be tightly driven into the joint from the outside so as to fill the joint to one-half (~) of its depth. Unless other- wise specified, the rest of the joint shall be filled, with mortar as hereinafter specified. No joint shall be filled until the gaskets have beerl placed on the next ~w0 (2) joints in advance. Water must not be allowed to rise up to, or around the pipe, or to fiow through the pipe until after the mortar is set hard. (b) "JOINT COMPOUND" JOINTS. Where the plans require that pipe joints shall be made with pipe joint compound, said joints shall be made in the following m~nner: The inner surface of the socket shall be painttd with the compound beated to the temperature o! that to be used for the joints as hereinbefore specified, and thereafter thc spigot end ot the pipe to be placed into this socket shall be similarly painted. A gasket of dry oakum twisted into strands shall be tightl~ driven into the joint from the outside, using a calking iron ot proper size, leaving a clear space o{ from one to one- and one-half (1~) inches between the gasket and the outer end of the socket. In wet trenches the pouring of the joint shall follow the calking ot the gasket as rapidly as possible in order that the oakum shall not fill a portion of the space by swelling. Alter the pipe has been laid in place and calked, a greased runner shall be placed around the pipe and the ends of the runner clamped, leaving an opening at the top of the pipe slightly off center, and sufficiently large to permit the compound to be poured. The space shall then be completely filled by pouring into thc pipe joint, compound which has a temperature not less than 250 degrees Fahrenheit, and which will readily flow to all parts of the annular space to be fill~d, and shall contain no cooled lumps or inequalities in the consistency of the heated liquid. Said runner shall not be removed for at least fifteen (15) minutes after the joint has been poured. Alternate joints may be run on the bank, standing the pipe on end, in which case a runner will not be required. Where joints have been rn~n in this manner the pipes shall not be moved for thirty minutes thereafter. The vessel used for pouring shall always contain enough of the liquid compound to fill a complete joint at one runuing. The vessel used for heating the compound shall contain enough material fur running several joints. (c) TEST FOR LF.4~L~GE, ITC. On the completion of each section of the sewer between structures,' where the soll is wet, the end of the sewer at the upper structure