(a) Encasement pipe installed under city maintained and NCDOT maintained roadways shall be in accordance with NCDOT's “Policies and Procedures for Accommodating Utilities on Highway Rights-of-Way”.
(b) Encasement pipe installed under railroads shall be in accordance with “Part 5.3, Specifications for Pipelines Conveying Non-Flammable Substances” as developed by the American Railway Engineering Association (AREA).
(c) Pipe materials used for the carrier pipe shall be adjusted as needed to meet the requirements of the roadway or railroad owners.
(d) Pipe supports used in the encasement pipe designed and manufactured for the support of the carrier pipe shall be as follows:
(1) Band and riser material. Fourteen-gauge steel for band and riser except if the riser is over six inches high, the steel shall be ten-gauge for riser. Riser shall be of the channel shape. Band with risers shall have a fusion bonded PVC coating of a minimum of ten mil thickness. Band shall be bolted together with stainless steel bolts, nuts and washers.
(2) Band liner. Provide PVC liner a minimum of 0.09 inches.
(3) Runners. Glass reinforced polyester of UHMW polymer plastic. Runner shall be a minimum of one inch wide and not more than one inch shorter than the bandwidth. Provide tow top and two bottom runners for pipe sizes through 12 inches and two top and four bottom runners for pipes over 12 inches.
(e) End seals installed on the encasement pipe may be a wrap around or a pull-on type. Seal shall be made of 1/8-inch thick synthetic rubber and shall be secured with stainless steel banding straps with worm gear tightening device.
(Ord. of 11-7-16; No. 10-16)