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Home My WebLink AboutQuestions & Answers 20201217 Questions & Answers 20201217\ NE 16th St – Jefferson Ave NE Stormwater Green Connections Project Project No. SWP-27-4016, WTR-27-4016 December 17th, 2020 Question and Answers 1. Question: Is this project requiring sand collars/manhole adapters for polypropylene storm sewer pipe? Answer: Under Standard Details please see Std. Plan – 201.00 “Catch Basin Type 2” Note 6. This note states “WHEN CONNECTING TO A NEW PIPE, USE A FLEXIBLE CONNECTOR (KOR-N-SEAL BOOT WITH CORRUGATED PIPE ADAPTER OR APPROVED EQUAL). WHEN CONNECTING TO AN EXISTING PIPE, USE A FABRICATED SAND COLLAR OF THE SAME MATERIAL AS THE CONNECTING PIPE.” This applies to all pipe material. However, please note that Addendum No. 2 alters the above Note 6 to provide better clarification. “WHEN CONNECTING TO A NEW PIPE, USE A FLEXIBLE CONNECTOR (KOR-N-SEAL BOOT OR APPROVED EQUAL). USE CORRUGATED PIPE ADAPTER AS REQUIRED. WHEN CONNECTING TO AN EXISTING PIPE, USE A FABRICATED SAND COLLAR OF THE SAME MATERIAL AS THE CONNECTING PIPE.” 2. Question: Does the City of Renton really want shackle rods, star bolts, nuts and washers as the restraint system for all the waterline or is a proprietary restrained pipe such as TR Flex and mega-lugs for fittings suitable for bidding? Answer: Shackle rods with star bolts and nuts are only used for the short sections of 6-inch D.I. pipe from the fire hydrants to the auxiliary gate valves at the main line tee as shown on Standard Plan No. 310.1. The ductile pipes for the new water mains shall be Push-on joint or Tyton-Joint. All ductile iron fittings with mechanical-joint end(s) and all valves with mechanical- joint end(s) shall have restraint follower gland(s) with multiple gripping wedges meeting the requirements of ANSI/AWWA C111/A21.11 or ANSI/AWWA C110/A21.10. Addendum No. 2 addresses this question and will be issued to all plan holders and/or prospective bidders. Questions & Answers 20201217\ 3. Question: In Special Provisions section 7-08.3(1)C paragraph one it states, “Pipe bedding for PVC sewer pipe shall consist of clean, granular pea gravel consistent with Section 9-03.12(3).” Does the City of Renton allow for pea gravel for pipe bedding? Answer: Addendum No. 2 addresses this contradiction and removes any language regarding pea gravel. The pipe bedding for PVC sewer pipe shall meet the criteria in Section 9-03.12(3).