Diamond Guidelines - BRAE 236

Diamond Guidelines - BRAE 236 - Edited for BRAE...

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Edited for BRAE 236 -Receiving and Handling- Inspection: Each pipe shipment should be inspected carefully upon arrival. The carrier is responsible for delivering the pipe. The receiver must make certain there has been no loss or damage. Should there be any errors or damage, make proper note on the delivery receipt. Make claim in accordance with the carrier’s instruction. Do not dispose of any damaged material. Carrier will advise you of the procedure to follow for freight damage. Pipe at the bottom of the stack may become out-of-round due to the weight of material above it. At normal application temperatures this corrects itself soon after the load is removed. Under freezing conditions this recovery to full initial roundness may take several hours or a few days. (Unusually hot weather conditions may also contribute to a degree of out-of-roundness. Self correction usually occurs as the temperature normalizes.) Unloading - Cold Weather Handling: Extra care should be used in handling during cold weather. WARNING: Carelessly unloading pipe can be hazardous. Use appropriate equipment and stay clear when removing tie-downs, banding, and dunnage material. Do not attempt to handle pipe bundles by pulling on strapping or packaging material. -Trench Preparation- Proper installation procedures and trench preparation are essential to successful PVC pipe performance. Trench preparation procedures for PVC pipe do not vary substantially from procedures used with other piping products. There should be no more trench prepared than the footage of pipe which can be laid in a day. A typical trench cross section and terminology are given in figure 1. (The illustration of Trench Cross-Section and Terminology assumes installation of one pipeline per trench.) Stringing Pipe: Pipe should be placed near the trench on the opposite side of the excavated earth. The coupling should be pointed in the direction of work progress. Trench width: Trench load and working space are two important considerations in determining the trench width to be used. The wider the trench at the top of the pipe, the greater the earth load imposed on the pipe. Trench width should allow sufficient room to
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work safely, for proper alignment and assembly of the joints. The outside diameter of the pipe plus one foot should be considered the minimum trench width at the height of the top of the pipe. The maximum trench width at the top of the pipe is equal to the pipe outside diameter plus two feet. Enlargement of the trench width, if necessary, should be to the trench area above the top of the pipe. When more than one pipeline is installed in a common trench, pipe to pipe contact is not permitted. The pipes must be separated by a minimum of six inches of haunch material, and the pipe-zone haunching must be compacted on both sides of each pipe.
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