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WATER AGENCIES' STANDARDS STANDARD SPECIFICATIONS

SECTION 06620

FIBERGLASS REINFORCED PLASTIC (FRP) VAULTS

PART 1

GENERAL

1.01

DESCRIPTION This section includes the materials and installation of Fiberglass Reinforced Plastic (FRP) vaults for metered services.

1.02

SERVICE APPLICATIONS FRP vaults shall be used for potable water meters and recycled water meters 100mm (4") and larger, or other applications as shown on the Approved Plans or as directed by the District Engineer.

1.03

REFERENCE STANDARDS The publications listed below form part of this specification to the extent referenced and are referred to in the text by the basic designation only. Reference shall be made to the latest edition of said standards unless otherwise called for. AASHTO ASTM C 109 ASTM C 293 ASTM D 256 ASTM D 543 ASTM D 570 ASTM D 635 ASTM D 746 ASTM D 1525 ASTM D 2444 ASTM G 53 WUC Association of State Highway and Traffic Officials Test Method for Compressive Strength of Hydraulic Cement Mortars Test Method for Flexural Strength of Concrete Test Method for Impact Resistance of Plastic and Electrical Insulating Materials Test Method for Resistance of Plastics to Chemical Reagents Test Method for Water Absorption of Plastics Test Method for Rate of Burning and/or Extent and Time of Burning of Self-Supporting Plastics in a Horizontal Position Test Method for Brittleness Temperature of Plastics and Elastomers by Impact Test Method for Vicat Softening Temperature of Plastics Specification for Polyethylene Plastic Pipe Practice for Operating Light and Water Exposure Apparatus for Exposure of Non-Metallic Materials Western Underground Committee, Recommended Guide No. 3.6

1.04

RELATED WORK SPECIFIED ELSEWHERE WAS Standard Drawings WAS Standard Specifications 01000, 02223, 03000, 03461, 09910, 11020, 15000, 15056, and 15061

Standard Specifications

Fiberglass Reinforced Plastic (FRP) Vaults 06620 - 1 of 4

Revised: 03/01/2001

1.05

DESIGN REQUIREMENTS FRP vaults shall be designed for H-10 parkway wheel loading.

1.06

SUBMITTALS Submit manufacturer's catalog data. Provide details and dimensions of the vault including location of reinforcing ribs, mouse hole pipe penetration locations, and details of the torsion-assisted cover.

PART 2

MATERIALS

2.01

FRP VAULT A. FRP vault components and appurtenant materials shall be selected from the Approved Materials List and shall comply with the dimensional requirements of the Standard Drawings. FRP vault components shall be designed for H-10 parkway loading and shall be in accordance with the Standard Drawings. H-20 vaults may be required in certain circumstances as directed by the Engineer or as indicated on the Approved Plans. FRP vaults shall use the highest grade of glass fibers as reinforcement, combined with thermosetting polyester resin binders and fire retardant fillers to attain the following minimum properties: PROPERTY Compressive Flexural Shear Modulus of Elasticity D. ULTIMATE 53.82 MPa (7,800 psi) 135.9 MPa (19,700 psi) 75.4 MPa (10,920 psi) WORKING 34.5 MPa (5,000 psi) 89.7 MPa (13,000 psi) 48.3 MPa (7,000 psi) 19,320 MPa (2.8 x 106)

B.

C.

Mouse hole openings or "knockouts" in FRP vaults shall be located in accordance with the Standard Drawings and shall be sized sufficiently to permit passage of the largest dimension of pipe and/or flange. The FRP vaults shall incorporate two-piece hinged covers constructed of either Reinforced Polymer Concrete (RPC) or aluminum. Covers shall be load-rated equal to or greater than the vault to which they are attached. 1. RPC covers shall have a two-leaf, non-skid surface with a torsion-assisted heavyduty galvanized steel frame. The heavy-duty galvanized steel frame shall be attached to the cover and to the FRP vault with 316 stainless steel bolts and nuts. The cover shall have locking cover arms which hold the cover leaves open and release when pushed outward. The cover shall be lockable, either by pentahead bolting or by providing for padlock installation. Aluminum covers shall have a two-leaf, non-skid surface with a torsion-assisted aluminum frame selected from the Approved Materials List. The aluminum cover shall be compatible with the FRP vault and attached to the FRP vault with 316 stainless steel bolts and nuts. The cover shall be lockable, either by pentahead bolting or by providing for padlock installation.

E.

2.

Standard Specifications

Fiberglass Reinforced Plastic (FRP) Vaults 06620 - 2 of 4

Revised: 03/01/2001

2.02

CRUSHED ROCK BASE AND BACKFILL MATERIALS Crushed rock base and backfill materials shall be in accordance with Section 02223.

2.03

JOINT SEALING COMPOUND Joint sealing material shall be a silicone-based caulking material as recommended by the manufacturer.

2.04

PIPE PENETRATIONS FRP vaults shall be manufactured with the proper mouse hole pipe penetrations in accordance with the Standard Drawings. Field-cutting of the pipe penetrations shall not be permitted.

2.05

REPAIRING FIBERGLASS AND RPM COMPONENTS A. Minor repairs to the fiberglass portions of the FRP vaults may be made using a marine grade fiberglass repair kit. Apply the fiberglass and bonding agents of the repair in accordance with the manufacturer's recommendations. Minor repairs to the RMP portions of the FRP vault cover with a brick mortar mix repair kit in accordance with the manufacturer's recommendations.

B.

PART 3 3.01

EXECUTION

EARTHWORK Vault excavation, foundation stabilization if necessary, placement of rock base material, backfill and compaction shall be performed in accordance with Section 02223. The excavation shall be large enough to accommodate the vault structure and permit access to the openings and backfilling operations.

3.02

INSTALLATION A. FRP vaults shall be placed on 150mm (6") thick concrete pads underlain by a 150mm (6") DG base in accordance with the Standard Drawings. FRP vault sections shall receive a silicone joint sealing compound prior to setting the RPC or aluminum cover in place as shown on the Approved Plans. The silicone joint sealing compound shall be installed according to the manufacturer's recommendations to provide a watertight joint which remains impermeable throughout the design life of the structure. Assemble FRP vaults to the elevation required by the location of the vault as shown on the Standard Drawings or as follows: 1. Shoulder Areas: Top of cover shall be 25mm (1") above the existing surface where outside the limits of a traveled way. Vaults shall not be placed in or around roadside or drainage ditches without the prior approval of the District Engineer.

B.

C.

Standard Specifications

Fiberglass Reinforced Plastic (FRP) Vaults 06620 - 3 of 4

Revised: 03/01/2001

2.

Unpaved easements: Top of cover shall be 150mm (6") above the ground surface. Guard Posts around the vault may be required in this area as directed by the District Engineer.

D.

Secure vault access doors in accordance with the manufacturer's recommendations. Access doors shall be built up so that the hatch is installed as required. The Contractor is responsible for placing the cover at the proper elevation where paving is to be installed and shall make all necessary adjustments. Where vaults are to be given a protective coating, they shall be free of seepage and surface moisture. After the structure and all appurtenances are in place and approved, backfill shall be placed in lifts in accordance with the requirements of Section 02223 to the original grade or to the limits shown on the approved plans. 0.03 cubic meters (1 cu ft) of crushed rock shall be placed adjacent to the hatch gutter drain outlet. Replacement of asphalt or concrete pavement shall be in accordance with the requirements of the agency having jurisdiction.

E.

F.

G.

3.03

FIELD PAINTING AND COATING Covers and appurtenances shall be field-painted as directed by the District Engineer in accordance with Section 09910.

END OF SECTION

Standard Specifications

Fiberglass Reinforced Plastic (FRP) Vaults 06620 - 4 of 4

Revised: 03/01/2001

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