77-Sec 33 44 15 Boxes and Endwalls.pdf

BOXES AND ENDWALLS

33 44 15-1

SECTION 33 44 15

PART 1 - GENERAL

1.01. SECTION DESCRIPTION

A. The Work of This Section Includes, but is not limited to:

1. Influent box

2. Subdrain system endwall

1.02 RELATED SECTIONS

A. Related Work Specified Elsewhere:

1. Section 01 57 13: Soil Erosion and Sediment Control

2. Section 03 30 53: Concrete Work for Utilities

3. Section 05 53 00: Aluminum Grating

4. Section 31 20 00: Earthwork

5. Section 31 23 16.26: Rock Removal

6. Section 31 23 33: Excavation, Backfill & Compaction

7. Section 32 93 00: Landscaping

8. Section 33 46 16: Subdrain System

1.03 QUALITY ASSURANCE

A. Reference Standards:

1. Pennsylvania Department of Transportation

Publication 408 Specifications Publication #72 Standards for Roadway Construction

B. Acceptable Manufacturer:

1. Precast structures shall be provided by a firm regularly engaged in the manufacture of such products of the types, materials and sizes required, whose products have been in satisfactory use in similar service for not less than five (5) years.

2. Precast structures shall be provided by one of the following manufacturers or approved equal.

• Monarch Precast Concrete Corporation

• Modern Concrete Septic Tank Company

1.04 SUBMITTALS

A. Shop Drawings:

1. Submit detailed shop drawings of boxes and end walls, including reinforcing steel details.

33 44 15-2

1.05 PRODUCT DELIVERY, STORAGE AND HANDLING

A. Precast Concrete Units:

1. After fabrication and curing, transport the units to the job site. Protect until required for installation.

2. Handle to avoid damage to surfaces, edges and corners and to avoid creation of stresses within the units.

B. Other Requirements:

1. Section 01 60 00 also addresses transportation and handling along with storage and protection of materials and equipment.

PART 2 - PRODUCTS

2.01 MATERIALS

A. Coarse Aggregate Subbase:

1. PADOT Number 2A, Type C, Section 703.2, Publication 408 Specifications.

B. Structural Grade Carbon Steel: ASTM A36

C. Concrete: Section 03 30 53

2.02 FABRICATIONS

A. Precast Cement Concrete Units:

1. Comply with the requirements of Section 713.2(d),Publication 408 Specifications

B. Boxes:

1. Comply with the type, design and dimensions shown on the Drawings and in accordance with Publication #72 (RC-34) for precast units.

C. End Walls:

1. Comply with the type, design and dimensions shown on the Drawings and in accordance with Publication #72 (RC-31) for precast units.

PART 3 - EXECUTION

3.01 EXCAVATION

A. Perform excavation as specified in Section 31 23 33.

B. Locate influent box and subdrain system as indicated on the Drawings.

33 44 15-3

3.02 CONSTRUCTION

A. Construct influent box of either precast sections or of cast-in-place construction in compliance with the type, design and dimensions shown on the Drawings and in accordance with Publication

#72 (RC-34).

1. Provide aluminum frame to accommodate grating as shown on the Drawings and in accordance with Section 05 53 00.

2. Place precast units on a compacted 6" coarse aggregate subbase.

3. Construct cast-in-place units on undisturbed earth.

4. Shape bottom of boxes to channel flow of water to the outlet pipe and to prevent water from standing in box.

B. Construct endwalls of either precast units of cast-in-place construction in compliance with the type, design and dimensions shown on the Drawings and in accordance with Publication #72

(RC-31).

1. Cast-in-place endwalls shall be monolithically cast reinforced concrete units.

C. Do not permit pipes to project more than 2" into influent boxes. Do not expose end of pipe through faces of endwalls.

3.03 BACKFILLING

A. Backfill structures only after examination by the Resident Project Representative.

B. Perform backfilling and compaction as specified in Section 31 23 33.

END OF SECTION