ITEM 604 – FENCING

604.1 Description

This Item shall consist of furnishing and constructing posts and barbed wire or chain link fences in accordance with the details, and at the locations, shown on the Plans, or as required by the Engineer.

604.2 Material Requirements

604.2.1 Barbed Wire

Barbed wire shall conform to the requirements of ASTM A 121, Class I. The barbed wire shall consist of 2 strands of 12.5 gauge wire, twisted with 2 points, 14gauge barbs spaced 100 mm apart.

604.2.2 Chain Link Fence Fabric

Chain link fence fabric shall be fabricated from 10 gauge galvanized wire conforming to AASHTO M 181 and shall be of the type shown on the Plans. Before ordering the chain link fence fabric, the Contractor shall submit a sample of the material to the Engineer for testing and for approval.

604.2.3 Concrete Post

Concrete posts shall be made of Class A concrete in accordance with Item 405, Structural Concrete. The posts shall be cast to a tapered section 3 m long, or to the length shown on the detailed Plans, and shall have a smooth surface finish.

604.2.4 Steel Post

Steel posts shall be of the sections and length as specified or as shown on the Plans. The posts shall be copper bearing steel and shall conform to the requirements of AASHTO M 183 for the grade specified.

604.2.5 Steel Reinforcement

Steel reinforcement for concrete posts shall be deformed steel bars conforming to the provisions of Item 404, Reinforcing Steel.

604.2.6 Hardwares

Nuts, bolts, washers and other associated hardware shall be galvanized after fabrication as specified as ASTM 153.

604.3 Construction Requirements

The Contractor shall perform such clearing and grubbing as may be necessary to construct the fence to the required grade and alignment. Fence shall generally follow the contour of the ground. Grading shall be performed where necessary to provide a neat appearance.

Gates shall be constructed as shown on the Plans

604.3.1 Erection Post

The post shall be erected vertically in position inside the formwork of the foundation block prior to the placing of concrete and shall be adequately supported by bracing to prevent movement of the post during the placing and setting of the concrete. The posts shall be erected to the height and location shown on the Plans, or as ordered by the Engineer.

604.3.2 Installation of Chain Link Fence fabric

The chain link fence fabric shall be set to line and elevation and pulled taut between each post before spot welding, or other method of fixing, is carried out. Where splicing of the fence fabric is necessary, or at joints, the lapping of the chain link fence fabric shall be for a minimum of 100 mm and shall occur only at the post. No horizontal splicing will be permitted. The fence fabric shall be fixed to the posts as shown on the Plans. Any surface protective layer damaged during welding and/or construction shall be restored properly.

604.4 Method of Measurement

The quantity to be paid for shall be the number of linear meter measured center to center of posts, of fencing erected in place and accepted.

604.5 Basis of Payment

The quantity, as determined in Subsection 604.4, Method of Measurement, shall be paid for at the contract price per unit of measurement respectively for each of the particular items listed below and as shown in the Bid Schedule, which price and payment shall be full compensation for furnishing and placing all materials and for all labor, equipment, tools and incidentals necessary to complete the Item.

Payment will be made under:

Pay Item No.	Description	Unit of Measurement
604 (1) 604 (2) 604 (3) 604 (4)	Fencing (Barbed wire) Fencing (Chain Link Fence Fabric) Fencing (Posts) Fencing (Gates)	Linear Meter Linear Meter Each Each