S-19-26_SECTION_06740.pdf

Special Provisions – Storey Boulevard Extension Project

SECTION 06740 - FENCES

PART 1 GENERAL

1.01 SUMMARY

A. This section describes the requirements for the construction of 4 - wire fence and treated post and rail fence.

B. Specialty items that include but are not limited to specialty gates, overhead archways, etc. shall be disassembled and reassembled by the Contractor.

Separate payment will not be made for this work and is subsidiary to the fencing pay items.

PART 2 PRODUCTS

2.01 MATERIALS

Provide materials in accordance with the following:

Material Subsection

Barbed Wire 06745 - PART 2 Twisted Barbless Wire 06745 - PART 3 Fence Posts 06745 - PART 4

Provide 3 ft [1 m] of galvanized gate chain with ¼ inch [6 mm] diameter welded links.

PART 3 EXECUTION

3.01 GENERAL

A. Remove fence in accordance with Section 02050, Removal and Disposal of

Structures and Obstructions.

B. Place fence 12 in [300 mm] inside the right-of-way lines except where topography prevents construction. When required at breaks in fencing or intersections with existing fences, make appropriate adjustments in post spacing to meet the requirements for the type of fence specified.

3.02 WIRE FENCE

A. METAL POSTS

1. For fences with wooden or plastic posts, add metal posts between regular posts at intervals of 25 ft [7.62 m]. Set posts firmly and plumb. Remove and replace damaged posts.

B. WOODEN POSTS

1. Wooden posts to be spaced every 100 ft [30.5 m]. Drive or tamp posts. If posts are driven, orient the small end of the post in the ground. Orient tamped posts with large (butt) end in the ground.

C. END PANELS AND BRACE PANELS

1. Place end posts, corner posts and brace posts with the large end (butt) in the ground. Notch posts to provide a flat bearing surface for cross braces.

2. Use cross braces as specified for the type of panel used and nail to each post with at least three 40d spikes. Bevel diagonal cross braces to obtain adequate bearing against the brace posts.

3. Use type I, II, or III end panels. When conditions prevent installing the deadman required for type I, use a type II or III. End panels placed in a corner installation may share a common end post. Install end panels at each termination of a fence run, change in direction, gate location, and other locations specified by the engineer.

4. When fencing around curves, place a brace panel at the beginning, end, and center of the curve. Depending on the curves radius and length, place additional brace panels at locations along the curve as specified by the engineer.

D. WIRE INSTALLATION

1. Attach wire to posts as follows:

a. Tangent Sections. Place on the landowner’s side of the post

b. Curves. Place on the outside of the curve.

2. If a strand of wire touches the ground, tie it to the next higher wire, or change wire spacing with the engineer’s approval. Firmly attach wire or fencing to posts and braces as specified. Stretch wire taut and install at the required elevations.

E. STAYS

1. Use wire stays for barbed wire fence. Place them at midspan between posts and extend 2 in [50 mm] below the bottom wire. For woven wire fence, place wire stays at midspan between posts and extend from the top barbed wire to 6 in [150 mm] below the top of the woven wire as specified.

2. When specified, use wood stays meeting requirements for gate sticks. Space equally and place with the bottom touching the ground. Staple each wire to the stay.

F. WIRE GATES

1. Provide wire gates at approaches, cattle guards, and at least one wing fence on each side of the roadway at structure locations and other locations specified or determined by the engineer. When the wing fence is 50 ft [15 m] long or longer, the engineer may require an additional brace or end panel to support the gate.

2. Use the same barbed wire number and spacing as specified for the fence.

Use a 6- barbed wire gate with a combination woven and barbed wire fence.

For gate hinges and gate supports, use a double loop of 9-gage, galvanized, smooth, twisted wire.

3. Install a gate tightener on all gates. The engineer may approve the use of tighteners other than those specified. Construct tighteners for metal posts the same way and of the same material as for wooden posts.

Provide wire gates in accordance with Table 3.02-1, Length of Wire Gates.

Table 3.02-1

Length of Wire Gates

Location Length ft [m]

Gate Sticks

(equally spaced)

Approaches 20 [6.0] 5

3.03 POST AND RAIL

A. TREATED 3-RAIL FENCE

1. Post spacing shall be 12 ft [3.66 m] maximum. Rail spacing shall be as follows: 12” inches, on average, shall separate the bottom of the bottom rail to the top of ground;

the top of the top rail shall be 4 inches below the top of the wooden post; equally space the middle rail from the top and bottom rails. Rails shall be attached to wooden posts using stainless steel #10 x 4” screws.

2. All wooden posts and horizontal rails shall be Cedar or Redwood and pressure treated with an approved EPA method such that complete penetration of the Cedar or Redwood shall be obtained.

3. Regular wood posts shall have a nominal measurement of 4 inches wide by 4 inches in height and 8 feet in total length. End/Gate posts shall have a nominal measurement of 6 inches wide by 6 inches in height and 8 feet in total length.

Horizontal rails shall have a nominal measurement of 2 inches wide by 6 inches in height.

4. Depth of wood posts in soils shall be a minimum of thirty-six (36) inches, with a total of 5 feet above ground height.

3.04 TEMPORARY FENCE

A. If placing fence will interfere with construction, place temporary fence. Use the temporary fence type and configuration specified, and leave it in place at the completion of the contract. Temporary fence placed for contractor convenience will be at no additional cost to the department.

B. Install temporary fence in accordance with the applicable portions of Subsection 3.02, Wire Fence. Standard brace panels may be used in lieu of end panels. The department does not require gate tighteners for temporary fence wire gates.

3.05 REMOVE AND RESET FENCE

A. Salvage material, including hardware, posts, brace panels and gates; if insufficient to complete the fence, provide additional new materials at no additional cost to the department.

B. When specified, reset gates by removing, salvaging, and reusing existing gates and hardware. Provide new materials as required at no additional cost to the department.

3.06 WIRE ACCEPTANCE

A. For wire products used not meeting the specification requirements for the type of wire specified, the engineer will do one of the following:

1. Reject and require removal of the out-of-specification material at no additional cost to the department;

2. Accept and leave the material in place with the contractor’s cost of the wire product deducted; or

3. Accept the material at a reduced unit price in accordance with the Materials

Program’s Schedule of Price Adjustment for Out-of-Specification Wire

Products in effect at the time of the contract award. Obtain a copy from the

Materials Program.

PART 4 METHOD OF MEASUREMENT AND BASIS OF PAYMENT

4.01 METHOD OF MEASUREMENT

A. 4-wire fence, post and rail fence, temporary fence, and removing and resetting wire and post and rail fence shall be measured by the lineal foot.

B. Wire gates shall be measured by each gate installed.

4.02 BASIS OF PAYMENT

A. Payment shall be made at the contract unit price bid for each item multiplied by the respective number of units placed.

Pay Item Pay Unit

Fencing (Post & Rail) LF

Fencing (4 Wire) LF

Fencing (20’ Wire Gate) EA

Remove and Reset Fence (Wire) LF

Remove and Reset Fence (Post and Rail) LF

Temporary Fence LF

END OF SECTION