minimum design & construction standards - Martin County, Florida

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olled against pipe already unloaded. Special precautions should be taken to avoid damage to lined fittings and pipe. The interior of all pipes, fittings and other appurtenances shall be kept free of dirt and foreign matter at all times. D) All valves, bends, tees, crosses, and dead ends shall be restrained with an approved mechanical restrained joint system. Where proprietary restrained joint are not used, tie rods and megalugs are the recommended system. (See Section XIV approved product list.) E) Tie rods used as a method of joint restraint shall be by means of steel tie back bolts, nuts, washers and all thread rods meeting ASTM A-242 requirements (Cor-Ten steel or equal) and painted in accordance with the procedures described herein. Tie rods and nuts shall be equal in diameter to the tee bolts and nuts which were supplied with the applicable fittings. Two tie rods per joint are required for sizes 4” diameter through 10” diameter, four tie rods per joint for sizes 12” diameter through 16” and 6 tie rods per joint for sizes 18” through 24”. F) Air relief valves shall be at the design high points. Installation of air release valves to correct high points caused by improper installation of pipe (not at design grade) will not be permitted. (See Section XIV approved product list.) G) All pipes shall be laid to line in a clean dry trench on line and grade with valves plumb. All pipe shall have a minimum cover of 30 inches and a maximum cover of 48 inches unless otherwise noted on the plans or required by permit. H) The trench at the top of the pipe shall be kept to a maximum width of 24 inches plus the pipe diameter. The trench shall have a flat bottom, cut true and even, so that the barrel of the pipe shall bear its full length. Pipe bells will be placed in small pockets specifically excavated to receive the bell. All excavations must be in compliance with OSHA regulations. I) No rocks larger than 2 inches in diameter or other items that may damage the pipe will be permitted over the pipe. In the event pipe is installed in rock excavation, 6 inches of granular material will be provided for bedding under the pipe. All pipe joints, thrust blocks, conflicts and service connections shall be left exposed until visually inspected and approved by a Department representative. J) All tapping assemblies installed on existing force mains shall be pressure tested and witnessed by a Department’s representative prior to the actual tap of the main. The pipe coupon shall be carefully preserved and submitted to the Authority’s representative. All tapping sleeves shall be installed a minimum of 18 inches from pipe joints. K) All field cuts on pipe shall require careful repair of the particular lining damaged in strict accordance with the manufacturer’s recommendations. 33
12. Horizontal Directional Drilling The following standards pertain to the design and construction of horizontal directional drilling of force mains in the Martin County Utilities service area. A) Pipe sizes and material: Horizontal directional drilled utility pipe shall be HDPE pipe (SDR 11 minimum). If the directional drilled pipe is to be used as a casing for a small diameter service line (up to 2” diameter), DR 18 pipe is acceptable. Pipe and couplings shall be free from voids, cracks, inclusions, and other defects and shall be uniform in color throughout the installation. B) Design Requirements: The Engineer shall inquire with the Department about approval of a horizontal directional drilling procedure for a pipe installation. With the Department’s concurrence, the Engineer shall submit a signed and sealed pilot bore plan for review and approval. The plan shall be submitted on a 24” x 36” sheet to a maximum 1” = 20’ horizontal and 1” = 2’ vertical scale (1” = 10’ horizontal, 1” = 1’ vertical scale preferred). The plan must show: • Finished grade and surface improvements • Locations of drill set-up • Length of bore • Deflection and radii of the pilot bore • Locations of existing utilities and underground structures • Minimum horizontal and vertical clearances from underground structures, conduits, piping systems (the proposed clearances must exceed the Departments standards plus the guidance system accuracy tolerance) • Pipe size and specifications • Proposed pilot bore pipe deflection limits (not to exceed 75% of the maximum deflection allowed by the pipe manufacturer) • Limits of directional bore installation • Limits of pressure testing • Connection to existing utilities • Rights-of-way limits, utility easements and temporary construction easements C) Preconstruction Meeting: Upon approval of the pilot drill plan by the Department and obtaining all necessary permits for the directional drilling, the Engineer shall schedule a preconstruction meeting with the Department. If the construction requires any field welding/fusion of HDPE pipe and/or fittings, a Certificate of Completion of a pipe fitting manufacturer approved training program is required. The Engineer and the Contractors performing the utility work shall attend the meeting. 34
Page 1 and 2: MINIMUM DESIGN & CONSTRUCTION STAND
Page 3 and 4: 10. Manholes 23 11. Inspection and
Page 5 and 6: 4. Water Source 72 5. Preparation o
Page 7 and 8: ) Location of Easements Easements s
Page 9 and 10: SECTION II - DESIGN GUIDELINES The
Page 11 and 12: 1. Design SECTION III - POTABLE WAT
Page 13 and 14: Horizontal separation of 15 feet to
Page 15 and 16: Gate valves shall be ductile iron,
Page 17 and 18: Hydrants shall be placed within 15
Page 19 and 20: 2) Intermediate Series 66 Epoxoline
Page 21 and 22: B) Any pavement cut shall be replac
Page 23 and 24: C) Preconstruction Meeting: Upon ap
Page 25 and 26: SECTION IV - SEWAGE SYSTEMS AND GRA
Page 27 and 28: Sewer mains shall be laid accuratel
Page 29 and 30: Adjustment to proper grade shall be
Page 31 and 32: The sewer main, house laterals and
Page 33 and 34: Joints for ductile iron pipe shall
Page 35 and 36: AWWA C-500, latest revision. Valves
Page 37: to provide advance notification of
Page 41 and 42: SECTION VI - SEWAGE PUMPING STATION
Page 43 and 44: TNEMEC 1) Primer: TNEME-ALUMINUM MA
Page 45 and 46: panel's control circuitry, shut dow
Page 47 and 48: eceptacle shall be used as manufact
Page 49 and 50: ) Radio. and the floats will contro
Page 51 and 52: 1. General SECTION VII - RECLAIMED
Page 53 and 54: A minimum 5 foot horizontal separat
Page 55 and 56: Coat: Urethane or equal (2.0 to 3.0
Page 57 and 58: 9. Reclaimed Water Service Lines an
Page 59 and 60: shopping centers, Developer's Engin
Page 61 and 62: for sizes 12” diameter through 16
Page 63 and 64: controller/display panel. The Depar
Page 65 and 66: • Level sensing devices require a
Page 67 and 68: 1. General Section VIII Pressurized
Page 69 and 70: 3. Reuse Water Sensor a) Sensor Sel
Page 71 and 72: 4. Automatic Control Valve The Auto
Page 73 and 74: SECTIONS IX, X RESERVED FOR FUTURE
Page 75 and 76: A. Water, Force, and Reclaimed Wate
Page 77 and 78: 1. Scope SECTION XII - SODDING The
Page 79 and 80: emoved from the work. 8. Watering T
Page 81 and 82: A. WATER 1. FIRE HYDRANTS SECTION X
Page 83 and 84: 11. CORPORATIONS 1. Ford 1" FB1000G
Page 85 and 86: 2. American Flow Control Series 250
Page 87 and 88: 5. Clow F 5345 6. MECHANICAL JOINT

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