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- 70-2.02 MATERIALS Not Used 70-2.03 CONSTRUCTION
- 70-3.01B Definitions Reserved 70-3.01C Submittals
- 70-3.02B(2) Coal Tar Coating
- 70-3.02B(3) Factory-Applied Fusion-Bonded Epoxy Coating
- 70-3.02B(4) Asphalt Coating
69-1.03 CONSTRUCTIONInstall entrance tapers and tapered inlets so that they function properly and efficiently, keep material in the dike, and prevent water from percolating under or around them. The seal between the taper or inlet and the surrounding material must be watertight. Connect an entrance taper to a downdrain pipe by means of a band coupler or a slip joint. Weld or rivet bulkheads and outlet pipes or flume pieces to the taper or inlet to form watertight connections. Securely anchor a downdrain to the slope of the ground as shown if the downdrain is not in a trench. Cable must not contact soil in finished position. Either adjust position or replace affected portion of cable with galvanized steel rod of equivalent diameter. If a plastic pipe joint restrainer assembly under Alternative A is used, install it immediately below the pipe bell. The bell end of a plastic pipe overside drain must face uphill.
69-1.04 PAYMENTThe payment quantity for pipe downdrain is measured along the centerline of the pipe and parallel with the slope line. The payment quantity includes the length of elbows, wyes, tees, and other branches to the point of intersection. If the pipe is cut to fit a structure or slope, the payment quantity is the length of pipe necessary to be placed before cutting, measured in 2-foot increments. Payment for the length of slip joints is not included in the payment for pipe downdrain. The payment quantity for pipe downdrains under concrete slope paving is measured from the beginning of the corrugated steel pipe to the end of the downdrain. The payment quantity for an entrance taper includes the length of the tapered section and the tail pipe. The payment quantity for a tapered inlet includes the length of the tapered section and the flume stub. 69-2–69-10 RESERVED 70 MISCELLANEOUS DRAINAGE FACILITIES 70-1 GENERAL 70-1.01 GENERALSection 70-1 includes general specifications for (1) installing miscellaneous drainage facilities for water drainage and transmission and (2) constructing casings for bridges. Miscellaneous drainage facilities include pipe components made of pipe or other materials. Pipe risers include pipe riser connections and bar reinforcement steel riser safety cage. Miscellaneous drainage facilities do not include steel covers, frames and grates, frames and covers, manhole frames and grates, manhole frames and covers, or other miscellaneous metal parts. Iron and steel items used for miscellaneous drainage facilities must comply with section 75. For a miscellaneous drainage component with alternative in the bid item description, choose from the types of the component shown. Do not mix different types of the same component in the same location. 70-1.02 MATERIALSSteps and ladders must be (1) steel if they are installed in steel or concrete drainage facilities or (2) aluminum if they are installed in aluminum drainage facilities. Hardware installed in aluminum drainage facilities must be aluminum. Epoxy-resin adhesive for bonding a pipe slip joint to a cross drain must comply with the materials specifications for applying epoxy-resin adhesive to concrete. Boards for redwood covers must be no. 1 heart structural grade, S4S redwood. Minor concrete drainage appurtenances including concrete foundations, bases, and basin floors must comply with section 51-7.
70-1.03 CONSTRUCTIONExcavation and backfill for miscellaneous drainage facilities must comply with section 19. Attach steps and ladders to miscellaneous drainage facilities where described. If new drain inlets or manholes are placed in paved or surfaced areas, do not construct the drain to final grade until the paving or surfacing adjacent to the drain is completed. Install drainage pipe stubs, pipe riser connections and bar reinforcement steel riser safety cages. 70-1.04 PAYMENTThe Department does not pay for pipe or casing in excess of the length shown. The payment quantity for any type of pipe is the length measured along the centerline of the pipe to the nearest 0.1 foot of pipe. 70-2 CORRUGATED METAL PIPE DRAINAGE FACILITIES 70-2.01 GENERALSection 70-2 includes specifications for fabricating and installing drainage facilities with corrugated metal pipe. Corrugated metal pipe and coatings must comply with section 66. 70-2.02 MATERIALSNot Used 70-2.03 CONSTRUCTIONNot Used 70-2.04 PAYMENTNot Used 70-3 WELDED STEEL PIPE DRAINAGE FACILITIES 70-3.01 GENERAL70-3.01A SummarySection 70-3 included specifications for fabricating and installing drainage facilities with welded steel pipe. Drainage facilities constructed with welded steel pipe include: 1. Energy dissipators 2. Inlets 3. Risers 4. Reducers 5. Manholes
70-3.01B DefinitionsReserved 70-3.01C SubmittalsSubmit color options for the finish paint. The Engineer selects the color of the finish paint. 70-3.01D Quality Assurance70-3.01D(1) GeneralReserved 70-3.01D(2) Quality ControlTest the pipe under the operating head for 2 hours with no leaks. Correct any leaks or defects and retest if necessary. 70-3.02 MATERIALS70-3.02A GeneralWelded steel pipe must comply with one of the following specifications: 1. AWWA C200 2. ASTM A53/A53M, Grade B 3. API Specification 5L, Grade B or Grade X42 70-3.02B Coatings70-3.02B(1) GeneralIf a coating is described, coat all portions of the welded steel pipe drainage facility. Repair of internal and external wall coatings must comply with the following: 1. Breaks or scuffs in the epoxy coating that are less than 36 square inches must be repaired by the application of epoxy material similar to and compatible with the durability, adhesion and appearance of the original epoxy coating under section 4.4.4.1.2 of AWWA C213 2. Repair coating must be a minimum thickness of 0.010 inch, 10 mils, after drying 3. Department rejects a pipe section if individual breaks exceed 36 square inches or if the total area of breaks exceeds 0.5 percent of the total surface area of the pipe section
1. The interior and exterior surfaces must be cleaned, primed, and coated with coal tar enamel. 2. The exterior surface must be wrapped with a bonded felt wrapper under AWWA C203 and section A1.2 of the appendix.
If a fusion-bonded epoxy coating will be exposed to above-grade sunlight, the exterior coated wall surfaces must be primed and painted. The primer and paint must comply with the type, standard, and coating thickness as shown in the following table:
70-3.02B(4) Asphalt CoatingReserved Directory: esc esc -> Biblical Eschatology Presentation by: D. Paul Beck May 4, 2016 Ground Rules esc -> Mikael Håfstrӧm Screenplay by Miles Chapman and Arnell Jesko esc -> Escort affinity Program for Audi Club Members esc -> Preliminary entry form pistol esc -> Application form esc -> Request from Asian and Pacific Training Centre for Information and esc -> Constitution of the engineering student council university of maryland esc -> Subdisciplines of Earth Science Geology; study of the earth Download 6.74 Mb. Share with your friends:
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