A. 
Description.
(1) 
The work of this article includes, but is not limited to:
(a) 
Storm drainage inlets.
(b) 
Storm drainage catch basins.
(c) 
Storm drainage pipe endwalls.
(d) 
Pipe culvert end sections.
(2) 
Related work specified elsewhere.
(a) 
Trenching, backfilling and compacting: Article VII.
(b) 
Soil erosion and sediment pollution control: Article IX.
(c) 
Finish grading, seeding and sodding: Article X.
(d) 
Bituminous paving and surfacing: Article XI.
(e) 
Manholes: Article XV.
(f) 
Storm drain pipe: Article XIX.
(g) 
Plain and reinforced cement concrete: Article XXVII.
(h) 
Cement concrete for utility construction: Article XXVIII.
(3) 
Definitions: none.
(4) 
Applicable Standard Details: none.
B. 
Quality assurance.
(1) 
Reference standards:
(a) 
Pennsylvania Department of Transportation (PennDOT), latest revision.
[1] 
Publication 408, Specifications.
[2] 
Publication 72M, Standards for Roadway Construction.
(b) 
American Society for Testing and Materials (ASTM).
[1] 
A36, Specification for Carbon Structural Steel.
[2] 
A47, Specification for Ferritic Malleable Iron Castings.
[3] 
A48, Specification for Gray Iron Castings.
[4] 
A185, Specification for Steel Welded Wire Fabric for Concrete Reinforcement.
[5] 
A536, Specification for Ductile Iron Castings.
[6] 
A615, Specification for Deformed and Plain Billet-Steel Bars for Concrete Reinforcement.
[7] 
C32, Specification for Sewer and Manhole Brick (made from clay or shale).
[8] 
C270, Specification for Mortar for Unit Masonry.
C. 
Submittals.
(1) 
Certificates. Submit certification from material suppliers attesting that materials provided meet or exceed specification requirements.
(2) 
Shop drawings. Submit detailed shop drawings, including reinforcing steel details.
(3) 
Submit concrete mix designs, certified results of compressive strength tests, certified field tests and copies of batch slips for all cast-in-place inlets, catch basins or endwalls.
D. 
(Reserved)
E. 
Product delivery, storage and handling.
(1) 
Precast concrete units.
(a) 
After fabrication and curing, transport the units to the job site. Protect until required for installation.
(b) 
Handle to avoid damage to surfaces, edges and corners and to avoid creation of stresses within the units.
(2) 
Inspections.
(a) 
Inspection by the municipality will, at a minimum, be made of materials upon delivery to the job site; of the subgrade, prior to construction or placement; and of the completed structure, prior to backfill.
(b) 
Precast cement concrete products shall be subject to rejection for failure to conform with these specifications or if any one of the following conditions is noted:
[1] 
Fractures or cracks passing through the wall, except for a single end crack that does not exceed the depth of the joint.
[2] 
Defects that indicate incorrect proportioning, mixing, and molding.
[3] 
Surface defects larger than 1/2 inch diameter indicating honeycombed or open texture.
[4] 
Damaged or cracked ends, where such damage would prevent making a satisfactory joint.
(c) 
Concrete testing (for cast-in-place work): Article XXVII.
A. 
Materials.
(1) 
Crushed stone subbase: AASHTO No. 57, Type C, Crushed Stone or Gravel aggregate, Section 703.2, Publication 408 Specifications. Do not use slag or cinders.
(2) 
Brick: ASTM C32 Grade SS, solid.
(3) 
Masonry mortar: ASTM C270, Type S.
(4) 
Malleable iron castings: ASTM A47, Grade 35018, Domestic.
(5) 
Ductile iron castings: ASTM A536, Grade 60-40-18, Domestic.
(6) 
Structural grade carbon steel: ASTM A36.
(7) 
Cast-in-place cement concrete: Article XXVIII.
(8) 
Cast gray iron castings: ASTM A48.
B. 
Fabrications.
(1) 
Precast cement concrete units.
(a) 
Comply with the requirements of Section 714, Publication 408, Specifications. Concrete shall be Class AA, unless otherwise specified.
(b) 
All reinforcing shall comply with the requirements of Publication 72M.
(c) 
Six-foot inlets shall be similar in all respects to standard inlets except that the longitudinal dimension shall be increased by 24 inches.
(d) 
Modified boxes (PennDOT Type 1, 2 or 3, Modified Type I or Modified Type II) shall have reinforced cover adjustment slabs in accordance with details in Publication 72M.
(2) 
Pipe culvert end sections.
(a) 
Concrete or metal: comply with the requirements of, Publication 72M, RC-33.
(b) 
Polyethylene end sections shall have smooth interior and be anchored at the flared end.
(3) 
Inlet grates:
(a) 
Comply with the requirements of Publication 72M, RC-34 PennDOT approved diagonal or bicycle-safe grates only.
(b) 
Six-foot inlet grates shall be similar in all respects to standard inlet grates except that the longitudinal dimension shall be increased by 24 inches.
(c) 
Inlet grates in traffic areas shall be capable of handling HS-25 loading.
(d) 
Welded structural steel grates and frames shall be coated with bituminous paint. All iron castings shall be furnished unpainted.
(4) 
Precast cement concrete grade adjustment risers. Risers shall be cast from 4,000 psi concrete (twenty-eight-day compressive strength), shall be a maximum of two inches thick, and shall be reinforced in accordance with ASTM A478.
(5) 
Outlet structures.
(a) 
Precast concrete or cast-in-place concrete in accordance with Subsection B(1).
(b) 
Construct outlet structures to dimensions shown on the drawings.
A. 
Excavation.
(1) 
Excavate as specified in Article VII.
(2) 
Excavate at location marked in the field.
(3) 
Excavate to the required depth and grade for the bottom of the unit plus that excavation necessary for placement of base material.
B. 
Construction.
(1) 
Construct inlets and catch basins of either precast cement concrete sections or of cast-in-place cement concrete, and of the type indicated on the drawings.
(a) 
Place precast units on a minimum twelve-inch compacted crushed stone base.
(b) 
Construct cast-in-place units on undisturbed earth.
(c) 
Shape bottom of inlet boxes to channel flow of water to the outlet pipe and to prevent water from standing in box.
(d) 
Unless units are cast-in-place, use precast cement concrete grade adjustment risers or brick to adjust to grade. Mortar in place.
(e) 
Place bicycle-safe grates in all paved (present or future) areas.
(2) 
Construct endwalls to the dimensions and design indicated on Standard Drawing RC-31M, Publication 72M, and of the type shown on the drawings. Construct endwalls of monolithically cast reinforced concrete.
(3) 
Do not permit pipes to project more than two inches into inlets. Do not expose end of pipe through faces of endwalls.
(4) 
Where indicated on the drawings, provide pipe culvert end sections of the design and dimensions of Standard Drawing RC-33M, Publication 72M.
(5) 
Install polyethylene end sections in accordance with manufacturer's instructions, bedded and anchored as required.
(6) 
Construct basin outlet structures with inverts, grates and openings at the required elevations shown on the drawings. Connect to new or existing outlet pipes, relaying or adding pipe as needed to meet the structure.
C. 
Backfilling.
(1) 
Backfill structures only after inspection by the municipality.
(2) 
Perform backfilling and compaction as specified in Article VII.
D. 
Disposal of excavated material: Article VII.
E. 
Restoration of surface areas.
(1) 
Restore paved areas in accordance with Article XIII.
(2) 
Restore unpaved surfaces as specified in Article VII.