605ENDWALLS, INLETS, MANHOLES, AND SPRING BOXES

605.1DESCRIPTION—This work is construction and/or cleaning of endwall, inlet, manhole, and spring box

structures of the type indicated.

605.2MATERIAL—

in Section 1105.02(a)3.c, or gray, malleable, or ductile iron as specified in Section 1105.02(h). For Type M Frames, provide either structural steel as specified in Section 1105.02(a)2 or gray, malleable, or ductile iron as specified in Section 1105.02(h). Certify as specified in Section 106.03(b)3. Coat structural steel grates with asphalt paint in the shop or in the field, before placement. Coat structural steel frames with asphalt paint when placing in the concrete inlet top. Cover frames and grates completely with no pin holes or voids. As an alternative to asphalt paint, hot dip galvanize structural steel grates and frames as specified in Section 1105.02(s).

ductile iron, as specified in Section 1105.02(h). Machine-grind the metal-bearing contact areas to fit in pairs. Matchmark each pair with notches to ensure satisfactory seating.

conforming to the vertical design load and the horizontal pull-out design load requirements of ASTM C478; and made of one of the following materials:

• Corrosion-resistant steel alloy bars containing 1.65% to 1.85% nickel and 0.8% to 0.9% copper, having a minimum tensile strength of 50,000 pounds per square inch and a minimum yield strength of 37,000 pounds per square inch, with a minimum elongation of 30% over a 2 -inch gage length.

• Deformed Wire, according to ASTM A1064, Epoxy-Coated according to ASTM A934, encased in a co- polymer polypropylene shell that conforms to ASTM D 4101, Table PP, Group 03, Class 4, Table B Designation B44744

• Deformed reinforcement bars, according to AASHTO M 31, Grade 40, galvanized after bending, according to ASTM A787

• Deformed reinforcement bars, according to ASTM A615, Grade 60, coated with copolymer polypropylene plastic that conforms to ASTM D4101; Table PP; Group 03 Copolymer or Impact Modified; Class 2, 3, or 4; any of grades 1 through 9

• Gray, malleable, or ductile cast iron, as specified in Section 1105.02(h)

• Aluminum alloy according to ASTM B221, 6061-T6, 6005-T5, or 6351-T6, with a protective coat applied to the portion to be embedded in the concrete

• Fiberglass-reinforced polyester, according to ASTM D2444 and D635

• Fabricate manhole steps free from sharp edges, burrs, and hazardous projections

Top Slabs, and Transition Slabs.

• Class AA Cement Concrete Modified. Provide cement concrete as specified in Section 704; except, with a minimum 28-day compressive strength of 4,000 pounds per square inch

• Structural Steel Angles and Plates . Section 1105.02(a)2 galvanized after fabrication as specified in Section 1105.02(s)

• Welded Studs. Section 1105.02(e)1

• No. 2A Coarse Aggregate. Section 703.2

• Class A Cement Concrete. Section 704

• Epoxy Bonding Compound. Section 706.1

• Reinforcement. Section 709

• Gaskets. Section 705.5

• Mortar. Section 705.6

• Caulking Compound. Section 705.7

• Precast Concrete Units. Section 714

• Concrete Curing Compounds. Section 711.2(a)

• Curing and Protecting Covers. Section 711.1

• Non-Shrink Grout. Section 1080.2(c)

• Asphalt Paint. According to AASHTO M140 (emulsified asphalt) meeting the requirements listed in Bulletin 25 and from a supplier listed in Bulletin 15, Section 702 -EM. Certify as specified in Section

106.03(b)3

• Zinc Chromate Primer. Federal Specification TT-P-645. Certify as specified in Section 106.03(b)3

605.3CONSTRUCTION—Before construction or fabrication, obtain acceptance of shop drawings, if required.

as shown on the accepted shop drawings, and as follows:

• Cement Concrete Structures—As specified in Section 1001.3

Excavate for the structure as required. Place No. 2A Coarse Aggregate and compact as specified in Section 350.3(e), if specified. Place concrete foundations and walls monolithically, except if otherwise allowed. Carefully remove existing castings that are to be reused. Clean and transport to the new location. Construct new inlet or manhole walls and bottoms to accommodate the dimensions of the existing castings. Set frames, concrete top units, and grade adjustment rings (if required for inlets and manholes) on a bed of non-shrink grout to provide full bearing on the supporting surface. Set pipes in inlets and manholes, flush with the inside structure face. For pipes protected by end walls, set flush with the exposed structure face. If constructing structures in conjunction with existing pipe culverts and drains, provide for satisfactory connections, as specified for new construction of a similar type.

Backfill excavated spaces around the structure, with acceptable embankment material, as specified in Section 206.3(b)4. Satisfactorily dispose of unsuitable and surplus materials. Brick and Brick and Mortar are not allowed for grade adjustments. Coat all aluminum surfaces to be embedded in concrete with one coat of zinc chromate primer, or a coat of asphalt paint. Allow to dry completely before placing concrete.

endwalls, spring boxes, grates, and scuppers. Repair any damage resulting from the cleaning operations. Prevent material cleaned from structures from entering streams or other bodies of waters and dispose of this material in a satisfactory manner.

605.4MEASUREMENT AND PAYMENT—

The price for the manhole includes excavation, compacted No. 2A coarse aggregate, manhole, concrete for channel, transition slab, if required, top slab, if required, backfill, and any other miscellaneous items required for the construction of the manhole. The height is measured from the Finished Grade Elevation to the bottom of the bottom slab elevation.

The price includes frame, cover, and grade adjustment rings, if required.

The price includes removing the existing frame and cover and installing the frame and cover on a new structure. Also includes grade adjustment rings, if required.

The price includes excavation, spring box, reinforcement, if required, backfill, and any other miscellaneous items required for the construction of the spring box.

For the type indicated.

For the Class of excavation, as indicated.

The price includes top unit, grate, and grade adjustment rings, if required.

The price includes top unit and grade adjustment rings, if required.

The price includes frame, grate, and grade adjustment rings, if required.

The price includes frames and grade adjustment rings, if required.

The price for the inlet box includes excavation, compacted No. 2A coarse aggregate, inlet box, concrete for channel, transition slab, if required, top slab, if required, backfill and any other miscellaneous items required for the construction of the inlet box. The height is measured from the Finished Grade Elevation to the bottom of the bottom slab elevation.

For the type indicated.

For the type indicated.