General
A shop drawing indicating the layout of all temporary construction fencing, barriers and gates shall be provided by the contractor to the project officer for approval. The placement of construction fencing and gates shall comply, throughout the life of the project, to the approved layout.
Temporary construction fencing and gates shall be of a similar style and color , and maintained in good order.
Construction sites shall be enclosed with a rigid barrier not less than six feet (1829 mm) high when:
- excavation, greater than 18 inches (457 mm) in depth, is within six feet (1829 mm) of a roadway.
- within five feet (1524 mm) of critical equipment as identified by the project officer.
- construction vehicles will be operating within five feet (1524 mm) of a walkway. The barrier shall be a "jersey barrier" with galvanized chain link fence rigidly attached to the top (see Section D, Temporary Roads).
Other construction sites shall be enclosed with a barrier not less than six feet (1829 mm) high. The barrier shall be galvanized chain link fence with vinyl slats. Dark brown vinyl slats will be installed vertically on fencing except as identified by the project officer.
The construction site will be secured to prevent unauthorized entry when work is not in progress. Gates will have double padlocks with the contractor controlling one lock, and NIH (Police Branch, Fire Department, and Maintenance Engineering Section) having keys to the other.
Execution
Avoid excavating for fence posts above existing underground utilities. Verify, as required, the location and depth of surrounding utilities prior to excavation.
Fence posts shall be securely fastened to the ground or finished surface. Where fencing must be moved or opened frequently, the project officer may approve use of portable fencing sections. All other requirements for fencing apply to the portable sections.
Posts shall be placed approximately 10 feet (3048 mm) on center.
Gates for construction deliveries and construction equipment movement shall be placed to minimize adverse impacts to existing or temporary roadways. Flagmen shall be used when contractors are obstructing existing or temporary roadways, walkways, or parking lots.
