Adjusting Frames and Grates Art. 603.03 MEDIAN INLET, of the number specified; CATCH BASINS TO BE RECONSTRUCTED WITH NEW FRAME AND GRATE or LID of the type specified, or CATCH BASINS TO BE RECONSTRUCTED WITH NEW MEDIAN INLET of the number specified; MANHOLES TO BE ADJUSTED WITH NEW FRAME AND GRATE or LID of the type specified, or MANHOLES TO BE ADJUSTED WITH NEW MEDIAN INLET of the number specified; MANHOLES TO BE RECONSTRUCTED WITH NEW FRAME AND GRATE or LID of the type specified, or MANHOLES TO BE RECONSTRUCTED WITH NEW MEDIAN INLET of the number specified; INLETS TO BE ADJUSTED WITH NEW FRAME AND GRATE or LID of the type specified, or INLETS TO BE ADJUSTED WITH NEW MEDIAN INLET of the number specified; INLETS TO BE RECONSTRUCTED WITH NEW FRAME AND GRATE or LID of the type specified, or INLETS TO BE RECONSTRUCTED WITH NEW MEDIAN INLET of the number specified; VALVE VAULTS TO BE ADJUSTED WITH NEW FRAME AND CLOSED LID of the type specified; or VALVE VAULTS TO BE RECONSTRUCTED WITH NEW FRAME AND CLOSED LID of the type specified. Additional reinforcement, when required for Type 15 Frames and Lids, will be included in the unit bid price of the type of structure specified. Excavation in rock will be measured and paid for according to Section 502. SECTION 603. ADJUSTING FRAMES AND GRATES OF DRAINAGE AND UTILITY STRUCTURES
603.01 Description. This work shall consist of adjusting the frames, with
grates or lids, of existing drainage and utility structures.
603.02 Materials. Materials shall be according to following.
Item Article/Section
a.Portland Cement Concrete ..................................................................... 1020
b.Building Brick (Made from Clay or Shale) .......................................... 1041.01
c.Concrete Brick ........................................................................................ 1042
d.Concrete Masonry Units ......................................................................... 1042
e.Precast Reinforced Concrete Manhole Sections .................................... 1042
f.Gray Iron Castings ............................................................................. 1006.14
g.Ductile Iron Castings .......................................................................... 1006.15
h.Structural Steel .................................................................................. 1006.04
i.Reinforcement Bars and Welded Wire Reinforcement ...................... 1006.10
j.Temporary HMA Ramps (Note 1) ………………………………. ............... 1030
k.Temporary Rubber Ramps ................................................................ 1033.01 Note 1. The HMA shall have maximum aggregate size of 3/8 in. (95 mm). CONSTRUCTION REQUIREMENTS
603.03 Two-Course Hot-Mix Asphalt (HMA) Construction. The existing
pavement adjacent to and for a distance not exceeding 12 in. (300 mm) outside the base of the casting to be adjusted shall be broken sufficiently to permit its removal. The existing pavement shall be broken and the grates adjusted just prior to placing Art. 603.03 Adjusting Frames and Grates the surface course. If the existing pavement is broken prior to placing the first course, it shall not be removed until the first course has been placed and compacted. Where a casting is enclosed in a concrete platform, the entire platform shall be broken, removed and replaced. Prior to placing the first course, the exposed surface of each casting shall be coated with an approved release agent to prevent the HMA from adhering to it. After the first course has been placed and compacted, the HMA over each drainage or utility structure and the existing pavement adjacent to the drainage or utility structure shall be removed. The broken pavement and HMA from these areas shall be disposed of by the Contractor according to Article 202.03. The frames shall then be adjusted to the finished pavement elevation according to the applicable portions of Section 602.
603.04 Single-Course HMA Construction. Prior to placing the HMA, the
existing pavement adjacent to and for a distance not exceeding 12 in. (300 mm) outside the base of the casting to be adjusted shall be broken, removed and disposed of by the Contractor according to Article 202.03. The frames shall then be adjusted to the finished pavement elevation according to the applicable portions of Section 602.
603.05 Replacement of Existing Flexible Pavement. After the castings
have been adjusted, the surrounding space shall be filled with Class SI concrete, or HMA surface or binder course material to the elevation of the surface of the base course or the binder course. If Class SI concrete is used, it shall be cured for a period of not less than 72 hours. If HMA is used, it shall be placed in 3 in. (75 mm) layers at the required temperature and compacted with a pneumatic tamper.
603.06 Replacement of Existing Rigid Pavement. After the castings have
been adjusted, the pavement and HMA that was removed, shall be replaced with Class SI concrete not less than 9 in. (225 mm) thick. The surface of the Class SI concrete shall be constructed flush with the adjacent surface. Class SI concrete shall be cured for a period of not less than 72 hours.
603.07 Protection Under Traffic. After the casting has been adjusted and
Class SI concrete has been placed, the work shall be protected by a barricade for at least 72 hours. When castings are under traffic before the final surfacing operation has been started, properly sized temporary ramps shall be placed around the drainage and/or utility castings according to the following methods.
a.Temporary HMA Ramps. Temporary HMA ramps shall be placed around the casting, flush with its surface and decreasing to a featheredge in a distance of 2 ft (600 mm) around the entire surface of the casting.
b.Temporary Rubber Ramps. Temporary rubber ramps shall only be used on roadways with permanent posted speeds of 40 mph or less and when the Frames, Grates, and Median Inlets Art. 604.03 height of the casting to be protected meets the proper sizing requirements for the rubber ramps as shown below. Dimension Requirement Inside Opening Outside dimensions of casting + 1 in. (25 mm) Thickness at inside edge Height of casting 1/4 in. (6 mm) Thickness at outside edge 1/4 in. (6 mm) max. Width, measured from inside opening to outside edge 8 1/2 in. (215 mm) min. Placement shall be according to the manufacturer’s specifications. Temporary ramps for castings shall remain in place until surfacing operations are undertaken within the immediate area of the structure. Prior to placing the surface course, the temporary ramp shall be removed. Excess material shall be disposed of according to Article 202.03.
603.08 Adjusting Rings. As an option to Articles 603.03 through 603.07, the
adjustment of frames and grates may be accomplished through the use of adjusting rings that fit on top of the frame. These adjusting rings shall be fabricated as a one- piece assembly from gray iron, ductile iron, or structural steel. They shall provide a structural capacity equal to or greater than the existing frame and shall not affect the opening size or surface appearance. The rings shall have a device for positively positioning and fastening the ring to the existing frame to prevent movement under traffic.
603.09 Basis of Payment. This work will be paid for at the contract unit price
per each for FRAMES AND GRATES TO BE ADJUSTED or FRAMES AND LIDS TO BE ADJUSTED. SECTION 604. FRAMES, GRATES, AND MEDIAN INLETS
604.01 Description. This work shall consist of furnishing, and installing
frames, grates, lids, covers, and median inlets where such items are not included in the cost of the drainage or utility structures involved.
604.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Gray Iron Castings ............................................................................. 1006.14
b.Structural Steel .................................................................................. 1006.04
c.Ductile Iron Castings .......................................................................... 1006.15
d.Portland Cement Concrete ..................................................................... 1020
e.Reinforcement Bars and Welded Wire Reinforcement ...................... 1006.10
604.03 Materials Permitted. The materials permitted for fabrication of the
various types of frames, lids, grates and the various numbers of median inlets shall be according to the following.
Referenced in this section
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 552–554 of 1,217. View official source ↗