36C25622R0094 323113 Chain Link Fences and Gates .docx

REPLACE AHU #104 AND DUCTWORK BLDG. 7

DEPARTMENT OF VETERANS AFFAIRS HEALTH CARE SYSTEM-ALEXANDRIA, LA

PROJECT NO.: 502-19-107

SECTION 32 31 13

CHAIN LINK FENCES AND GATES

GENERAL

SUMMARY

Section Includes:

Chain link fence, gates and accessories.

RELATED REQUIREMENTS (NOT USED)

APPLICABLE PUBLICATIONS

Comply with references to extent specified in this section.

ASTM International (ASTM):

A12113 - Metallic Coated Carbon Steel Barbed Wire.

A39211a - ZincCoated Steel ChainLink Fence Fabric.

A49111 - Aluminum Coated Steel Chain Link Fence Fabric.

A81712 - MetalCoated Steel Wire for ChainLink Fence Fabric and Marcelled Tension Wire.

B429 - AluminumAlloy Extruded Structural Pipe and Tube.

F56714a - Installation of ChainLink Fence.

F62614 - Fence Fittings.

F66811 - Polyvinyl Chloride (PVC) and Other Organic PolymerCoated Steel Chain Link Fence Fabric.

F90011 - Industrial and Commercial Swing Gates.

F118416 - Industrial and Commercial Horizontal Slide Gates.

F166408(2013) - Polyvinyl Chloride (PVC) and Other Conforming Organic Polymer Coated Steel Tension Wire used with Chain Link Fence.

F166508(2013) - Polyvinyl Chloride (PVC) and Other Conforming Organic Polymer Coated Steel Barbed Wire used with Chain Link Fence.

F220014 - Automated Vehicular Gate Construction.

F104316 - Strength and Protective Coatings on Steel Industrial Fence Framework.

F108316 - Pipe, Steel, HotDipped ZincCoated (Galvanized) Welded, for Fence Structures.

Chain Link Fence Manufacturing Institute (CLFMI):

Product Manual.

Federal Specifications (Fed. Spec.):

FFP110J - Padlock, Changeable Combination.

Master Painters Institute (MPI):

No. 18 - Primer, Zinc Rich, Organic.

SUBMITTALS

Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

Submittal Drawings:

Show size, configuration, and fabrication and installation details.

Manufacturer's Literature and Data:

Description of each product.

Installation instructions.

Certificates: Certify products comply with specifications.

Zinccoating.

Qualifications: Substantiate qualifications comply with specifications.

Manufacturer with project experience list.

Installer with project experience list.

QUALITY ASSURANCE

Manufacturer Qualifications:

Regularly manufactures specified products.

Manufactured specified products with satisfactory service on five similar installations for minimum five years.

Project Experience List: Provide contact names and addresses for completed projects.

Installer Qualifications:

Regularly installs specified products.

Installed specified products with satisfactory service on five similar installations for minimum five years.

Project Experience List: Provide contact names and addresses for completed projects.

Welders and Welding Procedures Qualifications: AWS D1.1/D1.1M. and/or AWS D1.3/D1.3M. as appropriate.

DELIVERY

Deliver products in manufacturer's original sealed packaging.

Mark packaging, legibly. Indicate manufacturer's name or brand, type, production run number, and manufacture date.

Before installation, return or dispose of products within distorted, damaged, or opened packaging.

STORAGE AND HANDLING

Protect products from damage during handling and construction operations.

WARRANTY

Construction Warranty: FAR clause 52.24621, "Warranty of Construction."

PRODUCTS

PRODUCTS - GENERAL

Provide fences and gates from one manufacturer.

CHAINLINK FENCING AND GATES

General: Conform to CLFMI Product Manual.

Chain Link Fabric: 2” x 2” diamond mesh 9 gauge aluminized steel chain link fence as indicated on Drawings.

AluminumCoated Steel Fabric (Aluminized): ASTM A491.

Fabric Selvage: K&T, Knuckle finish at one end, twist at other.

Fabric less than 1.8 m (72 inches) width, knuckle finish top and bottom.

BARBED WIRE

Metallic Coated Steel Barbed Wire: ASTM A121, Type Z, zinccoated double 2.5 mm (0.10 inches) twisted strand wire, with 4-point 2.0 mm (0.080 inches) round barbs spaced 125 mm (5 inches) on center.

FITTINGS

General: ASTM F626.

Tension and Brace Bands: Galvanized pressed steel.

Terminal Post Caps, Line Post Loop Tops, Rail and Brace Ends, Boulevard Clamps, Rail Sleeves: Pressed steel galvanized.

Truss Rod Assembly: Steel truss rod with a pressed steel tightener.

Tension Bars: Galvanized steel onepiece length 50 mm (2 inches) less than the fabric height.

Barbed Wire Arms: Pressed steel galvanized after fabrication Type II - three strand vertical arm.

TIE WIRE and HOG RINGS Galvanized: Minimum zinc coating 366 g/sq. m (1.20 oz./sq. ft.); 3.76 mm (0.148 inch) diameter steel wire.

GATES

Horizontal Slide Gate:

Structural Gate Frame:

The gate frame shall be fabricated from 6063-T6 aluminum alloy extrusions. The top member shall be a 3" x 5" (76mm x 127mm) aluminum structural channel/tube extrusion weighing not less than 3.0 lb/lf (4.4kg/m) for Internal Picket designs or 2.6 lb/lf (3.8kg/m) for External Picket designs. To maintain structural integrity this frame member shall be "keyed" to interlock with the “keyed” track member. If fabricated as a single horizontal piece, the bottom member shall be a 2" x 5" (51mm x 127mm) aluminum structural tube weighing not less than 2.0 lb/lf (2.9kg/m). If fabricated in two horizontal pieces, the bottom member shall be a 5" (127mm) aluminum structural channel weighing not less than 2.6 lb/lf (3.8kg/m). When the gate frame is manufactured in two horizontal pieces or sections, they shall be spliced in the field (the gate frame shall be fabricated in one or multiple sections depending on size requirements or project constraints).

Vertical Members:

The vertical members at the ends of the opening portion of the frame shall be "P" shaped in cross section with a nominal base dimension of no less than 2” x 2” (51mm x 51mm) and weighing not less than 1.6 lb/lf (2.3kg/m). The intermediate vertical members shall alternate between 2” x 2” (51mm x 51mm) and 1” x 2” (25mm x 51mm) in cross section weighing not less than 1.1 lb/lf (1.6kg/m) and 0.82 lb/lf (1.2kg/m) respectively.

Intermediate 1” x 2” (25mm x 51mm) vertical members weighing not less than .82 lb/lf shall alternate between 2” x 2” major members.

Splicing:

A ¼" x 5" x 24" galvanized steel splice plate shall be used to secure the two bottom channel members together utilizing eight (8) plated carriage bolts with lock nuts. The top members will be spliced together using a ¼" x 2" x 24" aluminum splice plate secured with six (6) drive rivets on one side and welded to the top member on the other side. The track is overlapped onto the opposing section in an alternating fashion, interlocking with the top primary member.

Gate Track:

The gate shall have a separate semi-enclosed “keyed” track, extruded from 6005A-T61 or 6105 T5 aluminum alloy, weighing not less than 2.9 lb/lf. Track members are to be located on each side of the top member. When interlocked and welded to the “keyed” top member, it forms a composite structure with the top of the gate frame. Welds are to be placed alternately along the top and side of the track at 9" centers with welds being a minimum of 2" long.

All welds on the gate frame shall conform to Welding Procedure Specification and Procedure Qualification Record to insure conformance to the AWS D1.2 Structural Welding Code. All individual welders shall be certified to AWS D1.2 welding code. See 1.02 D.

Gate Mounting:

The gate frame is to be supported from the track by four (4) swivel type, self-aligning, 4 wheeled, sealed lubricant, ball-bearing truck assemblies.

The bottom of each support post shall have a bracket equipped with a pair of 3” (76mm) UHMW guide wheels Wheel cover protectors shall be included with bottom guides to comply with UL325.

Gap protectors shall be provided and installed, compliant with ASTM F 2200.

Diagonal Bracing:

Diagonal "X" bracing of 3/16" or ¼” diameter stainless or galvanized steel cable shall be installed throughout the entire gate frame.

The gate shall be completed by installation of approved filler as specified.

Chain Link: 2” x 2” x 9 gauge aluminized steel chain link fabric shall extend the entire length of the gate (if operated gate, counterbalance must also have fabric to prevent reach through and comply with ASTM F 2200, see 1.03 C.1) Fabric shall be attached at each end of the gate frame by standard fence industry tension bars and tied at each 2” x 2” (51mm x 51mm) vertical member with standard fence industry ties. ASTM F 2200 requires attachment method that leaves no leading or bottom edge protrusions (cannot exceed 0.5 inch).

Posts:

Double sets of support posts shall be minimum 4" O.D. (102mm) round SS40 or 4” x 4” x 3/16” wall square steel tubing, grade 500. Gate posts shall be galvanized or coated and supported in concrete footings as specified by the design team.

Finish:

Gate to be mill finish aluminum or color coated with polyester powder as specified. If powder coated, the gate (including track member) and all accessories shall be pretreated chemically by sand blasting or other acceptable method to ensure proper coating adherence.

Gate Lock:

Gate system shall be furnished with a secure gate catcher. The catcher shall prevent the gate panel from being pried open while the gate is in the closed and locked position.

System Function:

Operation:

System shall be designed so that gate movement from the closed position is impossible except by electric or mechanical means.

Variable Speed-Rate of Travel:

The gate operator shall have the ability to achieve a gate speed of 2.2 feet per second and shall be equipped with soft start and soft stop function to prevent shock load to the gate panel and operator.

Cycle Testing:

The cantilever slide gate and operator system shall be cycle tested a minimum of 200,000 cycles.

Sliding Gate Operator:

The slide gate operator shall open and close cantilever, overhead, or track gates, to provide convenience and security. Motor box shall be 10-gauge galvanized steel with detention grade hinges and mogul lock.

The gate operator shall be UL 325 compliant for Class III and IV.

The gate operator shall include an APeX Controller with integrated radio receiver, plug-in loop detector capability, surge protection, and easy to read labeling standard.

Capacity:

The gate operator shall be rated to operate a gate weighing up to 5000 lbs.

Motor Size:

The electrical motor shall be 1 HP, [208 Single Phase] as produced by a nationally recognized manufacturer.

AC Drive:

The variable frequency drive unit shall allow for programmable speeds and programmable soft-start and soft-stop features.

Overload Protection:

Motor shall be protected against overload by either a thermal or a current sensing overload device.

Gear (Box) Reducer:

The self-enclosed gear-head gearbox shall be manufactured as a single unit, and shall consist of a hardened steel, machine cut worm and mating bronze gear running in oil bath. The gearbox shall perform the following functions:

Adjustable Clutching Device.

Manual disconnect by crank handle.

Gear Box Heater:

Operator shall include internal gearbox heater and a heater strip for the control box (20W).

Drive-Chain:

A #50 roller chain shall be utilized. All chain brackets and required attachment hardware shall be supplied.

Manual Operation:

A crank handle, located at ground level in the motor box, shall provide a two-step emergency procedure for manual operation:

Unlock and open motor-box door.

Fold out handle and crank gate opened or closed.

Limits:

The operator shall be equipped with an integral limit system, providing accurate settings to control the open and close positions of the gate, and shall not be affected by manual operation or motor removal.

Control Circuit:

U.L. listed operator shall have 5vdc controls.

Control Wiring:

The electrical contractor shall supply all exterior control wiring.

Audio Alarm:

This alarm shall have a dual function.

The first function shall be as a warning prior to gate movement. When the motor control board recognizes a command, this alarm shall be activated three (3) seconds before the motor is energized and the gate begins to move. This shall be continuously activated while the gate is in motion.

Main Power Disconnect Switch and Wiring Compartment:

When this switch is in the OFF position, the main power shall be disconnected from the Variable Speed Drive, Motor Control Board and power transformer(s).

Speed:

The gate operator speed shall be fully programmable allowing a speed of 2.2 feet per second.

Transformer:

Operators shall have an isolated low voltage (24VDC, 750mA) power supplied to provide power for external control devices (not including external gate lock).

Auto Close Timer:

The timer provides an automatic closure of the gate from the full open position, adjustable from 0 to 60 seconds.

Master/Slave:

Master/Slave or stand-alone capable with programmable setting.

Motor Housing:

Water Resistant Motor Box:

The motor box shall be constructed of 10-gauge sheet steel, hot-dip galvanized per ASTM A 123, gasketed and located at ground level for easy maintenance.

Includes thermostatically controlled heater.

Security Hinges and Tamper Resistant Security Screws:

Security hinges and screws shall be furnished to secure operator enclosure components.

Motor Box Lock:

Motor box shall be locked with a detention grade dead bolt. Three (3) keys shall be provided per key code.

Access Control:

Entrapment Devices:

Photoelectric through beams/photo eyes shall be installed to span the clear opening and gate path at the tail section.

Optional accessories, contact, non-contact, and control devices:

Control devices include pushbuttons, radio controls, keypads, card readers, key switches, telephone entry systems, and revenue control equipment.

Contact and non-contact devices include photoelectric sensors, vehicle detectors, proximity sensors, and contact edges.

Accessories include flashing strobe lights, cycle counters, and intercom systems.

CONCRETE

Concrete: 4,000 psi concrete.

ACCESSORIES

Barrier Coating: ASTM D1187/D1187M.

Welding Materials: AWS D1.1/D1.1M, type to suit application.

Galvanizing Repair Paint: MPI No. 18.

TouchUp Paint: Match shop finish.

EXECUTION

PREPARATION

Examine and verify substrate suitability for product installation.

Protect existing construction and completed work from damage.

INSTALLATION

Layout fence and locate position of post.

Installation:

Install accordingly to manufacturer’s instructions.

Touch up damaged factory finishes.

Repair galvanized surfaces with galvanized repair paint.

Repair painted surfaces with touch up primer.

CLEANING

Clean exposed fence surfaces. Remove contaminants and stains.

PROTECTION

Protect fence from traffic and construction operations.

Repair damage.

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