Section 32 31 13 - Chain Link Fencing and Gates

DIVISION 32 - SITE WORK

SECTION 32 31 13 - CHAIN LINK FENCING AND GATES PAGE 1 OF 4 ______

PART 1 - GENERAL

1.1 Work of this section includes:

.1 Provide chain link fencing and gates.

1.2 Submittals

.1 Submit manufacturer's technical data and installation instructions for metal fencing, fabric and accessories.

1.3 Quality Assurance

.1 Provide chain link fence and gates as complete unit controlled by a single source including necessary erection accessories, fittings and fastenings.

PART 2 - PRODUCTS

2.1 Acceptable Manufacturer

.1 Chain link fencing shall be as manufactured by Anchor Fence, Inc. or the approved equivalent and shall include the following types of fence:

a. Galvanized steel fencing and fabric.

2.2 Materials

.1 Steel fabric shall be No. 9 ga. size steel wires, 2" mesh with top and bottom selvages knuckled for fabric 60" high and under. Top and bottom selvages to be twisted and barbed for fabric over 60" high. Furnish one piece fabric widths for fencing up to 12' high. Finish - Galvanized ASTM A 392, Class II, with not less than 2.0 oz. zinc per sq.ft. of surface.

.2 Steel Framework, General: Galvanized steel, ASTM A 120 or A 123, with not less than 1.8 oz. zinc per sq.ft. of surface.

.3 Fittings and Accessories: Galvanized steel to suit manufacturer's standards.

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.4 End, Corner and Pull Post

Minimum sizes and weights:

- Up to 6' fabric height, 2.375" O.D. steel pipe, 3.65 lbs. per lin. ft. - Over 6' fabric height, 2.875" O.D. steel pipe, 5.79 lbs. per lin. ft.

.5 Line post to be spaced not more than 10'-0" o.c. unless otherwise noted.

Minimum sizes and weights:

- Up to 6' fabric height, 1.90" O.D. steel pipe, 2.70 lbs. per lin. ft. - Over 6' fabric height, 2.875" O.D. steel pipe, 5.79 lbs. per lin. ft.

.6 Gate Post:

Leaf width up to 6', 3.5" O.D. steel pipe, 4.85 lbs, per lin. ft.

.7 Fencing top and bottom rails shall be continuous 1.66 O.D. hot dip galvanized, 2.27 lbs. per foot steel pipe. Top rail shall pass through openings provided in post tops and each length shall be coupled with an internal swaged sleeve for a distance of 3". Fabric shall be attached to the top and bottom rail by means of double wrapped tie wires spaced at intervals of 24" maximum. Provide means for attaching rails securely to each gate, pull and end post.

.8 Wire ties shall be 11 gauge galvanized steel.

.9 Tension Wires - 7 gauge, coated coil spring wire, metal and finish to match fabric.

.10 Provide manufacturer's standard adjustable brace at end and gate posts and at both sides of corner posts with horizontal braced located at mid-height of fabric attached with adjustable tightener.

.11 Fabricate gates of metal and finish to match fence. Assemble gate frames by welding. Provide horizontal and vertical members to ensure proper gate operation and attachment of fabric, hardware and accessories and as follows:

a. Provide same fabric as fence.

b. Install diagonal cross-bracing consisting of 3/8" diameter adjustable length truss rods.

c. Fabricate perimeter frames of 4'-0" gate of minimum 2.375" O.D. hot dip galvanized, 3.65 lbs. per foot steel pipe; 16 O.D. gate perimeter frame shall be 2.875" O.D., hot dip galvanized, 5.79 lbs. per foot steel pipe. Paint all welds with a zinc based paint.

d. Hinges - Size and material to suit gate size, heavy duty, galvanized, non-lift-off type, 1-1/2 pair of hinges for each leaf, except provide 2 pair for each leaf at 16 foot wide opening.

e. Latch - Forked type to permit operation from either side of gate.

f. Provide gate keeper for securing free end of gate in both an open and closed position.

g. Provide roller to facilitate movement of gate over pavement.

.10 Concrete - Type II portland cement concrete, ASTM C 150, C 33 aggregate, and clean water. Mix materials to obtain concrete with a minimum 28-day compressive strength of 3,000 psi, 0.46 water/cement ratio, 3/4" maximum size aggregate, maximum 3" slump and 5" entrained air.

.11 Galvanized Repair Paint - High zinc dust content paint for regalvanizing welds in galvanized steel.

PART 3 - EXECUTION

3.1 Installation

.1 Drill or hand excavate holes for posts to diameters and spacing indicated in such a manner as to disturb the least amount of existing construction.

a. Excavate holes for each post to 1'-0" diameter.

b. Excavate hole depths approximately 4" lower than post bottom, with bottom of post extending 3'-8" below finished surface.

.2 Center, plumb and align posts in holes 4" above bottom of excavations. Place concrete around posts and vibrate or tamp for consolidation. Extend concrete footing 2" above grade and trowel to a crown to shed water.

.3 Run top rails continuously through post caps. Provide expansion couplings manufactured by fencing manufacturer.

.4 Install braces so posts are plumb when diagonal rod is under proper tension.

.5 Pull fabric tight and tie to posts, rails and tension wires. Install fabric to secure side of fence and anchor to framework so that fabric remains in tension after pulling force is released.

.6 Install gates plumb, level and secure for full opening without interference. Install ground set. Adjust hardware for smooth operation and lubricate where necessary.

.7 Tie Wire - Use U-shape wire, conforming to diameter of pipe to which attached, clasping pipe and fabric firmly with ends twisted at least 2 full turns. Tie fabric to line posts at 12" O.C.; tie fabric to rails and braces at 24" O.C.

.8 Install nuts for tension bands and hardware bolts on side of fence opposite fabric side. Peen ends of bolt or score threads to prevent removal of nuts.

END OF SECTION

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