Catch Basin, Manhole, Inlet, Drainage Structure Art. 602.02 SECTION 602. CATCH BASIN, MANHOLE, INLET, DRAINAGE STRUCTURE, AND VALVE VAULT CONSTRUCTION, ADJUSTMENT, AND RECONSTRUCTION
602.01 Description. This work shall consist of constructing, adjusting, or
reconstructing catch basins, manholes, inlets, or valve vaults, with frames and grates or lids, and constructing drainage structures with frames and grates.
602.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Portland Cement Concrete ..................................................................... 1020
b.Building Brick (Made from Clay or Shale) ........................................... 1041.01
c.Concrete Masonry Units ......................................................................... 1042
d.Gray Iron Castings (Note 3) ............................................................... 1006.14
e.Precast Reinforced Concrete Catch Basins, Manholes, Inlets, Drainage Structures, and Valve Vaults ............................................ 1042
f.Ductile Iron Castings .......................................................................... 1006.15
g.Structural Steel (Note 6) ..................................................................... 1006.04
h.External Sealing Band ............................................................................ 1057
i.Mastic Joint Sealer for Pipe .................................................................... 1055
j.Preformed Flexible Joint Sealants for Concrete Pipe ............................. 1056
k.Reinforcement Bars and Welded Wire Reinforcement ...................... 1006.10
l.High Density Polyethylene (HDPE) Plastic Adjusting Rings (Note 1) . 1043.02
m.Recycled Rubber Adjusting Rings (Note 2) ....................................... 1043.03
n.Fine Aggregate .................................................................................. 1003.04
o.Concrete Brick ........................................................................................ 1042
p.Precast Concrete Plug ................................................................... 1042.16(a)
q.Cement ................................................................................................... 1001
r.Plastic Steps (Note 3)
s.High Density Expanded Polystyrene Adjusting Rings with Polyurea Coating (Note 4) ................................................. 1043.04
t.Expanded Polypropylene (EPP) Adjusting Rings (Note 5) ................. 1043.05
u.Anchor Bolts and Rods (Note 7) ........................................................ 1006.09 Note 1. HDPE plastic adjusting rings may be used to adjust the frames and grates of drainage and utility structures up to a maximum of 3 in. (75 mm). They shall be installed and sealed underneath the frames according to the manufacturer’s specifications. Note 2. Riser rings fabricated from recycled rubber may be used to adjust the frames and grates of drainage and utility structures up to a maximum of 2 in. (50 mm). They shall be installed and sealed underneath the frames according to the manufacturer’s specifications. Note 3. Cast gray iron or plastic steps shall be tested according to Illinois Laboratory Test Procedure “Manhole Steps”. Note 4. High density expanded polystyrene adjusting rings with polyurea coating shall meet the design load requirements of AASHTO HS20/25. The rings may be used to adjust the frames and grates of drainage and utility Art. 602.02 Catch Basin, Manhole, Inlet, Drainage Structure structures up to a maximum of 6 in. (150 mm). They shall be installed and sealed underneath the frames according to the manufacturer’s specifications. Note 5. Riser rings fabricated from EPP may be used to adjust the frames and grates of drainage and utility structures up to a maximum of 6 in. (150 mm). An adhesive meeting ASTM C 920, Type S, Grade N5, Class 25 shall be used with EPP adjustment rings. The top ring of the adjustment stack shall be a finish ring with grooves on the lower surface and flat upper surface. The joints between all manhole adjustment rings and the frame and cover shall be sealed using the approved adhesive. In lieu of the use of an adhesive, an internal or external mechanical frame-chimney seal may be used for watertight installation. EPP adjustment rings shall not be used with heat shrinkable infiltration barriers. Note 6. All components of the manhole joint splice shall be galvanized according to the requirements of AASHTO M 111 or M 232 as applicable. Note 7. The threaded rods for the manhole joint splice shall be according to the requirements of ASTM F 1554, Grade 55, (Grade 380). Inlet and outlet tile or pipe shall be of the same size and kind, and shall meet the same requirements as the tile or pipe with which they are connected.
602.03 Classification. Classification as to adjustment or reconstruction shall
be on the following basis.
a.Adjustment. This classification shall include all those existing catch basins, manholes, inlets and valve vaults which are to be adjusted to grade where 2 ft (600 mm) or less of masonry will be either added, removed or rebuilt to bring the specified casting to the finished grade of the proposed improvement.
b.Reconstruction. This classification shall include all those existing catch basins, manholes, inlets and valve vaults which must be reconstructed or which are to be adjusted to grade where more than 2 ft (600 mm) of masonry will be either added, removed, or rebuilt to bring the specified casting to the finished grade of the proposed improvement. CONSTRUCTION REQUIREMENTS
602.04 Concrete. Cast-in-place concrete shall be constructed of Class SI
concrete according to the applicable portions of Section 503. Mortar shall be composed of one part Type S masonry cement, 2 1/4 to 3 parts sand, and mixed with water. The mortar may also be composed of 1/2 part portland cement, one part Type N masonry cement, 3 3/8 to 4 1/2 parts sand, and mixed with water. The materials shall be proportioned by dry volume. Mortar which has been mixed longer than 30 minutes or which has developed its initial set shall not be used. Catch Basin, Manhole, Inlet, Drainage Structure Art. 602.11 Bottom concrete slabs shall be reinforced by either reinforcement bars or welded wire reinforcement. Construction requirements for reinforcement bars shall be according to Section 508.
602.05 Brick Masonry. Brick masonry shall be constructed in horizontal
courses with a running bond using a header course every sixth course, or any standard bond of equivalent strength. The brick shall be laid in mortar.
602.06 Concrete Masonry Units. Concrete masonry units shall be
constructed in horizontal courses with vertical joints broken. The units shall be laid in mortar.
602.07 Precast Reinforced Concrete Sections. Precast reinforced concrete
sections shall be constructed in horizontal courses. The units shall be laid in mortar or sealed with external sealing bands, preformed flexible joint sealant, or mastic joint sealer. When mastic joint sealer is used, the material shall completely fill the joint after the units have been brought together. All precast units shall be installed on a 3 in. (75 mm) thick sand cushion. Handling holes shall be filled with a precast concrete plug and sealed with mastic or mortar. The plug shall not project beyond the inside surface after installation. When metal lifting inserts are used, their sockets shall be filled with mastic or mortar.
602.08 Steps. Steps, when required, shall be cast gray iron or plastic as
shown on the plans. Steps shall not extend beyond the outside of the structure.
602.09 Wooden Baffles. Wooden baffles, when required for drainage
structures, shall be constructed of pine, fir, spruce, larch, or cedar No. 4 common board (utility), S4S, untreated.
602.10 Flat Slab Tops. Flat slab tops shall be provided when shown on the
plans.
602.11 Furnishing and Placing Castings. Furnishing and placing of
castings shall be as follows.
a.Furnishing. When specified, new castings, including frames, grates and lids, shall be according to Article 604.03.
b.Placing for Rigid Pavements. Castings placed on concrete or masonry surfaces shall be set in full mortar beds. Castings shall be set to the finished pavement elevation so no subsequent adjustment will be necessary. Lifting devices will be approved by the Engineer.
c.Placing for Flexible Pavements. The structures shall be constructed or adjusted to an elevation which will match the cross section of the subgrade. After the base course and binder course have been placed, and prior to placing the surface course where there is no binder course, the structures shall be adjusted to grade by removing the binder and base course adjacent to and for a distance not exceeding 12 in. (300 mm) outside the base of the castings. After the structures have been adjusted, the castings shall be set in full mortar beds. Castings shall be set to the finished pavement elevation Art. 602.11 Catch Basin, Manhole, Inlet, Drainage Structure so that no subsequent adjustment will be necessary, and the space around the casting shall be filled with Class SI concrete, or a HMA surface or binder course material to the elevation of the surface of the base course or binder course. If Class SI concrete is used, it shall be cured for a period of 72 hours. If surface or binder course material is used, it shall be placed in 3 in. (75 mm) layers at the temperature requirements for the placing of surface or binder course and compacted with a pneumatic tamper.
602.12 Excavation and Backfilling. In order to permit the joints to be
mortared properly and to permit proper compaction of the backfill material, the excavation shall be made to a diameter of at least 6 in. (150 mm) greater than the diameter of the structure. The space between the sides of the excavation and the outer surfaces of the catch basin, manhole, inlet or valve vault shall be backfilled with sand or stone screenings, when these structures are in the subgrade or if the nearest point of the excavation for these structures falls within 2 ft (600 mm) of the pavement edge. When the structure falls beyond these limits, other backfilling material may be used with the approval of the Engineer. The backfill shall be compacted according to Article 550.07.
602.13 Inlet and Outlet Pipes. Pipe or tile placed in the masonry for inlet or
outlet connections shall extend through the walls and beyond the outside surfaces of the walls a sufficient distance to allow for connections, and the masonry shall be carefully constructed around them so as to prevent leakage along the outer surfaces.
602.14 Curing and Protection. After the masonry work is completed, it shall
be kept moist and protected from the elements for a period of not less than 48 hours.
602.15 Cleaning. All catch basins, manholes, inlets, and similar structures
newly constructed, adjusted or reconstructed under the contract, shall be cleaned of any accumulation of silt, debris, or foreign matter of any kind, and shall be free from such accumulations at the time of final inspection.
602.16 Basis of Payment. When new construction is specified, this work will
be paid for at the contract unit price per each for CATCH BASINS, MANHOLES, INLETS, DRAINAGE STRUCTURES, or VALVE VAULTS, of the type or type and diameter specified, and with the type of frame and grate or frame and lid specified or median inlet number specified. When adjustment or reconstruction is specified and existing frames, grates, and lids are to be used, this work will be paid for at the contract unit price per each for CATCH BASINS TO BE ADJUSTED, CATCH BASINS TO BE RECONSTRUCTED, MANHOLES TO BE ADJUSTED, MANHOLES TO BE RECONSTRUCTED, INLETS TO BE ADJUSTED, INLETS TO BE RECONSTRUCTED, VALVE VAULTS TO BE ADJUSTED, or VALVE VAULTS TO BE RECONSTRUCTED. When adjustment or reconstruction is specified and new frames, grates, lids or median inlets are to be used, this work will be paid for at the contract unit price per each for CATCH BASINS TO BE ADJUSTED WITH NEW FRAME AND GRATE or LID, of the type specified, or CATCH BASINS TO BE ADJUSTED WITH NEW 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
Referenced in this section
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 548–552 of 1,217. View official source ↗