Index of Valve Box Material Standards: Handley Plastic Curb and Valve Boxes, Test And
Index of Valve Box Material Standards: Handley Plastic Curb and Valve Boxes, Test and Monitoring Stations
Specifications apply to materials, design and performance requirements for plastic curb and valve boxes, test and monitoring stations, herein referred to as box(es), which provide access to underground service and mainline valves and corrosion systems.
- Materials used to construct products in above specifies scope shall be non-corrosive or corrosion resistant.
- Tube material shall be of high grade ABS, or equivalent rigid plastic that meets or exceeds ASTM D-1788, Type 1 requirements.
3.Lid material shall be of cast iron or ductile iron. Tensile strength or ductility of such material shall be equal or superior to hi-tensile cast iron ASTM A-126-B requirements.
4.Lid-locking bolt material shall be made of aluminum material equal or superior to ASTM B-253.
5.Lid Locking mechanism material shall be made of plastic to meet or exceed ASTM A-126-B requirements.
- Box shall be designed to be easily detected by magnetic and electronic locators even when box is covered by a minimum of four (4) inches of soil, sod and / or paving material.
- A magnet shall be securely attached at the top of the upper tube of the box for locating purposes. Material used to retain magnet in place shall remain effective at minus 15 degrees Fahrenheit.
NOTE:A MAGNETIZED LID OR MAGNET ATTACHED TO THE LID IS NOT ACCEPTABLE.
- Locking Mechanism:
- Lid of valve box shall be designed to employ a locking mechanism that will clamp it to the box collar in a closed position.
- Locking mechanism shall incorporate a standard pentagon-shaped head bolt which when measured from flat to vertex shall not be less than 0.830 inches or greater than 0.875 inches.
- Locking mechanism shall be such that the lid cannot be removed without using the proper wrench.
- Collar is designed for support of the lid and shall be securely attached to the upper tube to prevent separation after installation.
- Collar shall be designed to withstand an applied impact force of two (2) foot pounds without failure at -15 degrees Fahrenheit
- Box shall be of a tubular construction (cylindrical) with removable round lid.
- Box shall have a support flange at the base of the lower tube bell at least one-half (1/2) inch wide. If box is designed for use with an integral valve support, flange may be omitted.
- Length Adjustment
- Box shall have be of telescoping design with upper and lower tubes overlapping three (3) inches when the box is extended to its maximum overall length.
- Box of sliding design shall be made to maintain tension in the range of 40-80 pounds at any length between minimum and maximum lengths.
- Tension system shall be designed to allow upper portion of lower tube to be sawed off without loss of tension.
- Tension requirements must be met after box has been removed from storage and telescoped ten (10) times.
Box shall be designed for operational access to underground service line valves or stops in sizes 3/4 inches up through 8".
- Box shall be designed so that when installed, the collar will be flush with the surface and contain the lid so that it will not be in contact with the adjoining backfill or pavement.
- The cavity which holds the lid shall be designed so that water drains into the inside of the box.
- The top surface of the box lid shall be flush with the top of the box. The top of the bolt or locking device when in the locked position shall be flush with or below the lid surface.
The materials furnished to these specifications shall be manufactured under a quality control system that assures the items shall be free of defects and have a workmanlike finish conforming to the requirements of these specifications. Such materials shall be fit and safe for their intended use.
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