12 02/18 The approximate safe bearing loads of various soils given in the following table are for horizontal thrusts when the depth of cover over the top of the pipe exceeds two feet. SOIL SAFE BEARING LOAD lbs./sq. ft. Muck, Peat etc.* 0 Soft Clay 1,000 Sand 2,000 Sand & Gravel 3,000 Sand & Gravel Cemented with Clay 4,000 Hard Shale 10,000 * All thrusts are resisted by piles or tie rods to solid foundations, or by removal of muck or peat and replacement with ballast of sufficient stability. Pre-insulated SUPER TEMP-TITE fittings are provided with thrust plates designed to transfer thrust from the steel pipe to the concrete thrust blocks. The entire surface of the steel plates shall be coated. Steel plates shall be sealed during manufacture with fiberglass. START UP PROCEDURE: Start up procedure shall conform to generally accepted practices and be done in a workman-like manner. Improper start-up of steam lines may damage the piping system and attached equipment. Piping inside of manholes should be checked to make sure that the end seals are in-place at pipe penetration points so that moisture or water does not enter pipe insulation. MANUFACTURERS WRITTEN CERTIFICATION: After testing and prior to start- up of the system, the manufacturer must certify in writing that the system was installed per the manufacturers installation instructions.