Std Spec 664 Chain Link Fence.pdf

Art. 662.05 Calcium Chloride Applied

662.05 Basis of Payment. This work will be paid for at the contract unit price per foot (meter) for CONCRETE SHOULDER CURB.

SECTION 663. CALCIUM CHLORIDE APPLIED

663.01 Description. This work shall consist of furnishing and applying calcium chloride.

663.02 Materials. Materials shall be according to the following.

Item Article/Section

(a) Calcium Chloride ............................................................................... 1013.01

CONSTRUCTION REQUIREMENTS

663.03 General. The rate of application per square yard (square meter) and the quantity shown in the contract is based on the amount of anhydrous chloride to be applied. The actual application rate shall be the rate shown in the contract divided by the decimal equivalent of the percent anhydrous chloride.

663.04 Method of Measurement. This work will be measured for payment by weight (mass) in tons (metric tons).

The quantity of calcium chloride for which payment will be made will be the total weight (mass) multiplied by the decimal equivalent of the percent of anhydrous chloride.

663.05 Basis of Payment. This work will be paid for at the contract unit price per ton (metric ton) for CALCIUM CHLORIDE APPLIED.

When it is specified that the calcium chloride is to be mixed with aggregate, the cost of mixing shall be included in the type of work performed.

SECTION 664. CHAIN LINK FENCE

664.01 Description. This work shall consist of constructing chain link fence, gates, and accessories.

664.02 Materials. Materials shall be according to the following.

Item Article/Section

(a) Chain Link Fabric ............................................................................... 1006.27

(b) Line Posts (Steel Pipe, Structural Shapes and Roll Formed Sections) ....................................................................... 1006.27

(c) Terminal Posts (End, Corner or Pull) ................................................. 1006.27

(d) Gate Posts ......................................................................................... 1006.27

(e) Tension Wire ..................................................................................... 1006.27

(f) Horizontal Braces .............................................................................. 1006.27

(g) Truss Rods ........................................................................................ 1006.26

(h) Gate Frames ...................................................................................... 1006.27

Chain Link Fence Art. 664.05

(i) Post Tops .......................................................................................... 1006.28

(j) Stretcher Bars (Note 1) ...................................................................... 1006.27

(k) Fabric Ties ......................................................................................... 1006.27

(l) Fittings ............................................................................................... 1006.27

(m) Bolts and Nuts ................................................................................... 1006.27

(n) Barbed Wire ....................................................................................... 1006.28

(o) Portland Cement Concrete (Note 2)

Note 1. Stretcher bars shall be galvanized flat steel bar not less than 1/4 x 3/4 in. (6 x 19 mm) and the stretcher bar bands shall be galvanized flat steel bar not less than 1/8 x 1 in. (3 x 25 mm) with an 3/8 in. (M10) galvanized carriage bolt.

Note 2. Class SI concrete shall be used. When concrete is mixed in truck mixers or transported in agitating trucks, the time limit for unloading it may be extended to 120 minutes when approved by the Engineer.

CONSTRUCTION REQUIREMENTS

664.03 General. Prior to constructing the fence, the area along the line of the fence shall be cleared according to Section 201.

At locations of small natural or drainage ditches where it is not practical to conform the fence to the general contour of the ground surface, the Contractor, when directed, shall span the opening below the fence with barbed wire fastened to stakes of such length as required. The new fence shall be permanently tied to the terminals of existing fences whenever required by the Engineer. The finished fence shall be plumb, taut, true to line and ground contour, and complete in every detail. Where directed, the Contractor will be required to stake down the chain link fence at several points between posts.

664.04 Installing Posts. Posts shall be properly spaced and set in concrete.

Wherever right-of-way markers are omitted, the posts shall be set with back of post flush with the right-of-way line.

On terminal (end, corner, pull, brace) and gate posts, the post tops where required and brace rail clamps around the posts shall be placed before setting the posts in concrete bases. In setting the gate posts, great care shall be taken to make sure that gate posts are set the exact distance apart as shown on the plans. A line drawn across from the top of one gate post to the other shall be level, regardless of the grade at the ground line. If the ground is not level, the upgrade post shall be set first to get the proper height for the downgrade post. Fence shall not be erected until the concrete encasement around the posts has cured for at least seven days.

Stretcher bar bands and truss bands as called for on the plans shall be spread and slipped on end, corner, pull, brace, and gate posts as the next operation. Post tops shall then be installed on all other posts where required.

664.05 Post Tops. All hollow pipe and tube type posts shall be fitted with post tops. The bases of the post tops shall have flanges which fit around the outside of the posts and shall be secured in place.

Art. 664.08 Chain Link Fence

664.06 Tension Wire. Tension wires shall be used in the erection of chain link fence. The top and bottom tension wire shall be placed, stretched taut, and secured at ends to all posts in a satisfactory manner before fabric is placed. Tension wire shall be stretched tight with galvanized turn buckles spaced at intervals of not more than 1000 ft (300 m).

664.07 Braces. When required by the plans, braces shall be placed 12 in.

(300 mm) down from the top of the terminal posts and shall extend from the terminal (end, corner and pull) posts and gate posts to the brace posts. The braces shall be securely fastened to the post and trussed from brace post back to terminal posts with 3/8 in. (10 mm) round rods with a turnbuckle.

664.08 Fabric. The fabric shall be unrolled on the outside of the fence line with the bottom edge of the fabric against the posts. The various rolls shall be spliced by bringing the ends close together and weaving in a picket in such a way that it will engage both of the roll ends and catch with each twist each separate mesh of the end pickets of both rolls of fabric.

At end, corner or gate posts, the stretcher bar shall be slipped through the end picket of the fabric and the stretcher bar bands at the same time. Then the bolts in the stretcher bar bands shall be tightened. Additional rolls of fabric shall be spliced and placed as the erection progresses along the fence. In long sections, the fence shall be stretched at intervals of about 100 ft (30 m). The fabric shall be placed by securing one end and applying sufficient tension to remove all slack before making attachments elsewhere. After the fabric has been stretched, it shall be tied to the tension wire with fabric ties spaced not more than 24 in. (600 mm) apart. The fabric shall then be attached to the line posts with fabric ties spaced not more than 14 in.

(355 mm) apart. The topmost clip shall be placed on the line post as near the top of the fabric as possible and the lowest clip as near the bottom of the fabric as possible.

At terminal (end, corner and pull) and gate posts, the fabric shall be fastened with stretcher bars and bands. The fasteners shall be spaced not more than 14 in.

(355 mm) on centers for terminal (end, corner and pull) and gate posts. The topmost band shall be placed on these posts as near the top of the fabric as possible and the lowest band as near the bottom as possible.

Standard chain link fence stretching equipment shall be provided for stretching the fabric before tying it to the tension wire and posts. The stretching and tying operations shall be repeated about every 100 ft (30 m) until the run of fence is completed.

Before making a closure, the other end of the run shall be fastened to the end, corner or gate post as described previously. The operation of making a closure of a run shall be as follows: The stretching equipment shall be clamped on the ends of the fabric parallel to each other and about 5 ft (1.5 m) apart when the tension is first applied. The stretching shall continue until the slack has been removed from both sections of the fabric. If the ends overlap, the fabric shall be cut to match. The ends shall be joined by the insertion of a picket similar to the methods of connecting two rolls of fabric.

664.09 Gates. The gates shall be hung on gate fittings as shown on the plans. The lower hinge (ball and socket type) shall be placed on top of the concrete in which the gate post is set. The sockets for the cane or foot bolts shall be set in

Chain Link Fence Art. 664.13 concrete so that the plunger pin will fit perfectly in the socket when the gate is in a closed position. Gates shall be so erected as to swing in the direction indicated and shall be provided with gate stops as specified or shown on the plans. Gate keepers shall be provided to hold gates when in open position, and shall be located and installed as directed by the Engineer. Gates shall be erected in suitable places as shown on the plans. All hardware shall be thoroughly secured, properly adjusted and left in perfect working order. Hinges and diagonal bracing in gates shall be adjusted so that gates will hang level.

664.10 Existing Fence Connections. Wherever a new fence joins an existing fence, either at a corner or at the intersection of straight line fences, a corner post with brace post shall be set at the junction and braced the same as described for corner posts or as shown on the plans.

If the connection is made at other than the corner of the new fence, the last span of the old fence shall contain a brace span.

664.11 Protective Electrical Ground. Continuous fence shall be grounded at intervals not exceeding 500 ft (150 m) in urban areas and 1000 ft (300 m) in rural areas. There shall be a ground within 100 ft (30 m) of gates in each section of the fence adjacent to the gate.

Fence under a power line shall be grounded by three grounds, one directly under the crossing and one on each side 25 to 50 ft (7.5 to 15.0 m) away. A single ground shall be located directly under each telephone wire or cable crossing.

The counterpoise ground shall be used only where it is impossible to drive a ground rod.

The ground wire shall be connected to the fabric and the ground rod by a mechanical clamp of cast bronze body and bronze or stainless steel bolts and washers.

664.12 Method of Measurement. Chain link fence will be measured for payment in feet (meters), along the top of the fence from center to center of end posts, excluding the length occupied by gates.

Excavation in rock will be measured for payment according to Article 502.12.

664.13 Basis of Payment. This work will be paid for at the contract unit price per foot (meter) for CHAIN LINK FENCE, of the height specified, and at the contract unit price per each for CHAIN LINK GATES, of the opening sizes and types specified.

Excavation in rock will be paid for according to Article 502.13.