End Treatments
702.01 DESCRIPTION. Construct, install, and adjust manholes,
junction boxes, catch basins, culvert end treatments, and safety ends in accordance with these specifications and in conformity with lines and grades shown on the plans or established.
702.02 MATERIALS. Materials shall comply with the following
sections and subsections: Cast-in-Place Concrete (Class M) Section 901 Portland Cement 1001.01 Mortar Sand 1003.08.1 Sewer Brick 1018.12.1 Asphaltic Varnish 1008.03 Reinforcing Steel 1009.01 Precast Reinforced Concrete Drainage Units Section 1016 Frames, Grates, and Covers for Manholes, Catch Basins, and Junction Boxes 1013.05, 1013.06 Geotextile Fabric Section 1019 The contractor may furnish structures of either cast-in-place concrete or precast concrete units. Use mortar complying with 1001.03. Use mortar within 30 minutes after mixing or as recommended by the manufacturer.
702.03 Quality Assurance.
Manufacturing plants will be inspected periodically for compliance with specified manufacturing methods. Material samples will be randomly obtained for laboratory testing for verification of manufacturing lots. Materials will be subject to inspection at any time during the work.
702.04 CONSTRUCTION REQUIREMENTS. Construct all cast-in-
place structures in dry or dewatered areas, unless otherwise directed. Provide dewatering, shoring and bracing needed to comply with OSHA requirements at no cost to the Department. Remove logs, stumps, and other undesirable material.
702.04.1 Manholes, Junction Boxes, and Catch Basins:
Concrete construction shall conform to Section 805. Joints shall be full mortar joints no more than 1/2 inch wide. When specified, plaster outside faces of structures with 1/2 inch thick cement-sand mortar. Cure exposed surfaces of concrete and masonry in accordance with 805.10 for at least 48 hours. Cast precast concrete units with the specified number and size of pipe openings required for the drainage system; however, if additional pipe is required during construction for which no openings have been supplied, make such openings, provided any damaged units are replaced or satisfactorily repaired. Set precast units to established grade within ± 1/2 inch. Seal joints for sectional precast units with flexible plastic gasket material complying with 1016.01.1 and install to form a watertight seal. Wrap the joints of precast units with geotextile fabric a minimum of 18 inches on each side of the joint. Lap the ends of the fabric at least 10 inches. Secure the edges and ends of the cloth. Set metal frames in a full mortar bed. Conduit sections shall be flush on the inside of structure wall and project outside sufficiently for proper connection with the next conduit section. Fit masonry neatly and tightly around conduit. When grade adjustments of existing structures are specified, remove the frames, covers, and gratings and reconstruct the walls as required. Clean the frames and reset at required elevation. Thoroughly clean metal parts and place in good repair. In lieu of resetting structures, structures may be adjusted by means of approved metal adjustment rings. Clean new structures of silt, debris or other foreign matter. Coat non- galvanized metal parts of new or adjusted structures with asphaltic varnish meeting the requirements of 1008.03 or jet black metal work paint satisfactory to the engineer. Backfill the structure in accordance with 701.08. Dispose of excavated material not satisfactory for backfill and surplus material in accordance with 202.02.
702.04.2 Culvert End Treatments: Construct culvert end
treatments to control erosion at the ends of cross drains and side drains in accordance with these specifications, the plans, and as directed. Submit designs other than those shown on the plans for approval.
702.04.2 1 Concrete Toe Wall Placement: Cast-in-place toe
walls shall conform to 805.05 and plan details.
702.04.2 2 Geotextile Fabric Placement: Place geotextile
fabric in accordance with 712.03.1.
702.04.2 3 Sacked Concrete (Wet-Batched) Placement:
Revetment: Wet-batched sacked concrete revetments shall conform to the requirements of Section 712. Begin placement of sacked concrete at the toe of the revetment and progress to the end of the pipe. Comply with the compressive strength requirements of Section 901 for Class R concrete. Toe Wall: Stack sacks as indicated on the plans.
702.04.2 4 Sacked Concrete (Dry-Batched) Placement:
Revetment: Dry-batched sacked concrete revetments shall conform to the requirements of Section 712. Begin placement at the toe of the revetment and progress to the end of the pipe. Submit a certificate of compliance from the supplier of the dry -batched revetment with each shipment showing the proportions of cement and sand used (or other approved aggregates). Mix the contents of the package with water as required to produce a slump of 2 to 5 inches. Comply with the compressive strength requirements of Section 901 for Class R concrete. Toe Wall: Stack sacks as indicated on the plans.
702.04.2 5 Stone Placement: Stone revetment shall conform to
the requirements of Section 712.
702.04.3 Culvert Safety Ends: Furnish and install safety ends on
cross drains and side drains in accordance with these specifications, the plans, and as directed. Submit designs other than those shown on the plans for approval. Fabricate and place reinforcing steel in accordance with Section 806. Cast-in-place or precast concrete shall comply with Section 805. Bolt pipe runners in place as shown on the plans. Cast bolts into the plastic concrete or place in approximately 1-inch diameter holes and epoxy in place using an Approved Materials List anchor system as directed.
702.04.4 Frames, Grates, and Covers for Manholes, Catch
Basins, and Junction Boxes: Metal units shall comply with the following requirements:
1.Gray and ductile iron castings shall comply with 1013.06.1.
2.Steel castings shall comply with 1013.05.
3.Structural steel shall comply with 1013.01 and rivet steel shall comply with 1013.02.
4.Galvanizing shall comply with ASTM A123.
702.05 MEASUREMENT. Measure new and adjusted junction boxes,
manholes, catch basins, culvert end treatments, and safety ends per each. Excavation and backfill required for installation of these units will not be measured for payment. Dewatering, shoring and bracing needed to meet OSHA requirements are considered incidental to the work will not be measured for payment.
702.06 PAYMENT. Payment for new and adjusted junction boxes,
manholes, catch basins, culvert end treatments and safety ends will be made at the contract unit price per each which will include all materials, tools, equipment, labor and incidentals necessary to complete the work. The concrete in cast-in-place manholes, junction boxes, catch basins, and culvert end treatments and safety ends will be identified by lots and will be subject to pay adjustments in accordance with Table 901-5 and Note 1 therein. Acceptance for each precast concrete manhole, junction box, and catch basin lot will be in accordance with the requirements of Standard Plan PC-01. Size, sampling, and testing of each concrete lot shall be in accordance with the Materials Sampling Manual. Payment will be made under: Item No. Pay Item Pay Unit 702-01 Junction Boxes Each 702-02 Manholes Each 702-03 Catch Basins Each 702-04 Adjusting _________ Each 702-05 Cross Drain End Treatment Each 702-06 Side Drain End Treatment Each 702-07 Cross Drain Safety End Each 702-08 Side Drain Safety End Each
Referenced in this section
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Source: Standard Specifications for Roads and Bridges, 2016 Edition. Pages 404–407 of 1,145. View official source ↗