Attachment J-1 SOW.pdf

Department of Transportation Federal Aviation Administration ATO – Technical Operations Central Service Area

Submitted By:

Technical Support Center

AJW-C22B Cleveland District Office

FAA-CLE-7060

Specification For

“Security Fence & Gates” DWC, JKI, & HJT MALSR Light Stations

Detroit Metropolitan Airport (DTW) Romulus, Michigan

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

TABLE OF CONTENTS

DIVISION 1 - GENERAL REQUIREMENTS ------------------------------------------------------------------------------- 3

1A SCOPE --------------------------------------------------------------------------------------------------------------------- 3 1B PRE-CONSTRUCTION CONFERENCE ------------------------------------------------------------------------------------ 3 1C CONTRACTOR FURNISHED MATERIALS ------------------------------------------------------------------------------------- 3 1D COORDINATION ----------------------------------------------------------------------------------------------------------------- 3 1E ACCESS -------------------------------------------------------------------------------------------------------------------- 3 1F SITE VISIT ------------------------------------------------------------------------------------------------------------------------ 3 1G WORK SCHEDULE -------------------------------------------------------------------------------------------------------- 3 1H RESTORATION ------------------------------------------------------------------------------------------------------------- 4 1I CONTRACTOR'S LIABILITY ---------------------------------------------------------------------------------------------------- 4 1J PERMITS ------------------------------------------------------------------------------------------------------------------- 4 1K SAFETY -------------------------------------------------------------------------------------------------------------------- 4 1L LAYOUT ------------------------------------------------------------------------------------------------------------------- 4 1M CLEAN UP ----------------------------------------------------------------------------------------------------------------- 4 1N DISPOSAL ----------------------------------------------------------------------------------------------------------------- 4 1O SANITARY FACILITIES ---------------------------------------------------------------------------------------------------------- 4 1P WARRANTY --------------------------------------------------------------------------------------------------------------- 4 1Q SUBMITTALS --------------------------------------------------------------------------------------------------------------------- 4

DIVISION 2 - SITE WORK ----------------------------------------------------------------------------------------------------- 5

2A GENERAL ------------------------------------------------------------------------------------------------------------------ 5 2A.1 Protection of Existing Utilities ----------------------------------------------------------------------------------- 5 2A.2 Safety Requirements ----------------------------------------------------------------------------------------------- 5 2A.3 Clearing Fence Line ----------------------------------------------------------------------------------------------- 5 2A.4 Weather Conditions ----------------------------------------------------------------------------------------------- 5

2B EXCAVATION ------------------------------------------------------------------------------------------------------------- 5 2C BACKFILLING -------------------------------------------------------------------------------------------------------------------- 5 2D CHAIN LINK SECURITY FENCE ------------------------------------------------------------------------------------------- 5

2D.1 Standards and References ---------------------------------------------------------------------------------------- 5 2D.2 Manufacturer ------------------------------------------------------------------------------------------------------- 6 2D.3 Fabric --------------------------------------------------------------------------------------------------------------- 6 2D.4 Posts and Brace Rails --------------------------------------------------------------------------------------------- 7 2D.5 Brace Rail Assembly ---------------------------------------------------------------------------------------------- 7 2D.6 Truss Rods ---------------------------------------------------------------------------------------------------------- 7 2D.7 Tension Bars (stretcher) ------------------------------------------------------------------------------------------ 7 2D.8 Tension Bands ------------------------------------------------------------------------------------------------------ 7 2D.9 Tension Wire ------------------------------------------------------------------------------------------------------- 7 2D.10 Wire Ties ------------------------------------------------------------------------------------------------------------ 7 2D.11 Hog Rings ----------------------------------------------------------------------------------------------------------- 7 2D.12 Top Guard ---------------------------------------------------------------------------------------------------------- 8 2D.13 Caps ----------------------------------------------------------------------------------------------------------------- 8 2D.14 Marking ------------------------------------------------------------------------------------------------------------- 8 2D.15 Fence Installation-------------------------------------------------------------------------------------------------- 8

2E GATES -------------------------------------------------------------------------------------------------------------------------- 10 2E.1 Swing Gate ------------------------------------------------------------------------------------------------------- 10

2F CONCRETE PIERS -------------------------------------------------------------------------------------------------------- 11 2G FENCE LIGHTNING PROTECTION & GROUNDING --------------------------------------------------------------------- 11

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

1A

DIVISION 1 - GENERAL REQUIREMENTS

SCOPE

This specification, along with project drawings (Attachment 1a) and applicable codes & standards, cover the requirements of the Federal Aviation Administration (FAA) for installing a new chain link security fencing and swing gates for fifteen (15) MALSR Light Stations at Detroit Metropolitan Airport (DTW), Romulus Michigan.

The project contains, but is not limited to, the following work items:

1) The contractor must remove and dispose of all portions of the existing chain link fencing, and, gates at six (6) of the MALSR light stations. Nine (9) of the MALSR light stations have no existing fencing or gates.

2) The contractor must furnish and install a 20-foot square security enclosure, surrounding each of the fifteen (15) light poles, consisting of chain link fencing, and, one (1), double leaf, swing gate. The gate at each light station must be oriented such that the tilt-down light pole will lay centered in the gate opening when the light pole is horizontal. The security fencing and the swing gate must be as specified in this document and a shown on the project drawings.

3) The contractor must furnish and install lightning protection & grounding rods for the fence and gate as specified in this document and as shown on the project drawings.

5) The contractor must dispose of all removed materials, waste, and debris off airport property.

1B PRE-CONSTRUCTION CONFERENCE

The contractor must attend a pre-construction conference. Specific procedures for operating such as access to the work area, security requirements, safety procedures, scheduling, etc., in addition to those items specified herein, will be discussed at this conference.

1C CONTRACTOR FURNISHED MATERIALS

The contractor must furnish all materials, equipment and labor to complete the project. The contractor must make himself aware of all materials which he will be required to furnish under the contract. He must identify items which have a long lead time from a manufacturer or distributor, and must order these items as early as possible after the contract award.

1D COORDINATION

All coordination between the contractor and the FAA must be through the FAA Contracting Officer Technical Representative (COTR).

1E ACCESS

The contractor's access must be limited to the immediate MALSR light station site locations. The contractor personnel will be escorted by FAA personnel while at the project locations.

1F SITE VISIT

The contractor is encouraged to visit the site prior to bidding. Contact DTW Environmental SSC Manager at 734-955-7120 to arrange for an appointment.

1G WORK SCHEDULE

The Contractor must submit a work schedule to the COTR for approval prior to beginning work. The contractor must keep the COTR advised of any changes in the schedule.

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

1H RESTORATION

Any damage to existing utilities, structures, fences, ground surfaces (tire ruts) etc., must be repaired to the satisfaction of the COTR at the contractor's expense. All repairs to damaged grounds should include but not limited to reseeding.

1I CONTRACTOR'S LIABILITY

Damage to existing facilities and equipment caused by the contractor or his work force must be reported to the COTR without delay. The contractor must be responsible for repairing, or having repaired, all damaged areas of the building or equipment at the contractor's expense.

Coaxial cable cannot be spliced. Damaged coaxial cable must be replaced entirely from end to end. All repairs must be accomplished to the satisfaction of the COTR.

1J PERMITS

The contractor must be responsible for obtaining all city, county, etc. permits required to complete the job at no expense to the government.

1K SAFETY

The contractor must be responsible for safety on the work site. It is responsibility of the contractor to eliminate hazards that may result in tripping, electrical shock, fire, falling objects, environmental hazards, vehicular accidents, etc. The contractor must comply with all safety regulations required by OSHA. The contractor must have two l5 lb. Class ABC fire extinguishers at the work area through the progress of welding, metal cutting, or any other process involving a spark or fire hazard. The contractor must furnish and install barricades, obstruction markers, and warning signs as required and instructed by the COTR

1L LAYOUT

All layout of work is the responsibility of the contractor and must be approved by the COTR.

1M CLEAN UP

The contractor must keep the working area in clean and proper condition. All rubbish and waste resulting from the execution of the work must be removed at the end of each day.

1N DISPOSAL

All removed cable, clamps and scrap materials must be disposed of by the contractor off the site premises without additional cost to the FAA.

1O SANITARY FACILITIES

Sanitary facilities are not available at the site. The contractor must provide temporary toilet facilities as needed for the work crew. Temporary toilet facilities must be of the type approved by the local governing body. The location of the toilet facilities must be as directed by the COTR. The facility must be kept clean, secured as necessary to keep it from blowing over, and will be serviced weekly. The contractor must arrange for pick-up immediately following final approval of completed work.

1P WARRANTY

The Contractor must guarantee all materials and workmanship under his contract against defects or incorrect installation for a period of one year after completion. Repair or replacement of any defective materials, correction of faulty workmanship, or correction of any items not in accordance with the manufacturer’s specifications or directions and these specifications must be made at the Contractor’s expense.

---- End of Division 1 ----

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

DIVISION 2 - SITE WORK

2A GENERAL

2A.1 Protection of Existing Utilities It must be the contractor's responsibility to assure that locations of all underground cables and utility lines are established before beginning excavation work. Any damage to cables and utility lines must be promptly repaired at the contractor's expense to the complete satisfaction of owners of such lines and cables. The Federal Aviation Administration will field establish the approximate locations of all its own cables.

2A.2 Safety Requirements To protect life, property, and work, all earthwork operations must be performed in compliance with local and OSHA (Occupational Safety and Health Administration) requirements. The contractor must provide all sheeting, shoring and other bracing as necessary.

2A.3 Clearing Fence Line Clear the site of the fence of obstructions, and grade surface irregularities to allow the fence to conform to the general contour of the ground. Clear the fence line to a minimum width of 2 feet on each side of the centerline of the fence. This clearing consists of the removal of all stumps, brush, rocks, trees, or other obstructions that will interfere with proper construction of the fence.

remove (as part of the Work) existing fences that coincide with, or are in a position to interfere with the new fence location. Refill holes remaining after post and piers removal with suitable soil, gravel, or other material acceptable to the COTR and compact it properly with tampers.

Work must include the handling and disposal of all material cleared, excavated or removed, regardless of the type, character, composition, or condition of such material encountered.

2A.4 Weather Conditions Excavating or backfilling must not proceed when excessively wet or freezing weather conditions could adversely affect the load-bearing characteristics of the soil, or prevent proper compaction.

2B EXCAVATION

Excavate to dimensions indicated for concrete piers (fence footings), except in bedrock.

If bedrock is encountered, continue excavation to depth indicated or 18 inches into bedrock, whichever is less, with a diameter in bedrock a minimum of 2 inches larger than outside diameter of post. Clear post holes of loose material. Dispose of dirt and rock waste material off site, as directed.

2C BACKFILLING

All backfill material must be clay or granular soil, free of debris, and organic or frozen material.

Backfill material can be soil originally excavated, providing it possesses the above characteristics.

The contractor must test compaction of all layers of backfill by making qualitative comparisons between resistance to penetration of undisturbed soil and compacted backfill. Compaction will be considered adequate if backfill possesses equal or greater resistance to penetration than existing undisturbed soil.

2D CHAIN LINK SECURITY FENCE

2D.1 Standards and References The current versions of the following standards form a part of this specification and are not Government provided.

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

American Society of Testing and Materials (ASTM):

A53 "Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-coated Welded and Seamless"

A90 Standard Test Method for Weight of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings.

A121 Standard Specification for Zinc-Coated Steel Barbed Wire.

A123 "Specification for Zinc (Hot-Dipped Galvanized) Coatings on Iron and Steel

Products” A392 Specification for Zinc-Coated Steel Chain-Link Fence Fabric A525 Standard Specification for General Requirements for Steel Sheet, Zinc-Coated by the Hot-Dip Process.

A641 Standard Specification for Zinc-Coated Carbon Steel Wire.

A824 Standard Specification for Metallic-Coated Steel Marcelled Tension Wire for Use with Chain Link Fence.

C33 Specification for Concrete Aggregates C94 Specification for Ready-Mixed Concrete C150 Specification for Portland Cement F567 Standard Practice for Installation of Chain-Link Fence.

F626 Standard Specification for Fence Fittings.

F669 Standard Specification for Strength Requirements of Metal Posts and Rails for

Industrial Chain-Link Fence.

F883 Specification for Padlocks F900 Standard Specification for Industrial and Commercial Swing Gates.

F1083 Standard Specification for Pipe, Steel, Hot-Dipped Zinc-Coated Welded, for

Fence Structures.

F1234 Standard Specification for Protective Coatings on Steel Framework for Fences.

Federal Specifications:

FS RR-F-191 (Rev K): Fencing, Wire and Post Metal (and Gates, Chain-Link Fence Fabric, and Accessories)

FS RR-F-191/1 (Rev D): Fencing, Wire and Post, Metal (Chain-Link Fence Fabric) FS RR-F-191/2 (Rev E): Fencing, Wire and Post, Metal Chain-Link Fence Gates) FS RR-F-191/3 (Rev E): Fencing, Wire and Post, Metal (Chain-Link Fence Posts, Top

Rails and Braces) FS RR-F-191/4 (Rev F): Fencing, Wire and Post, Metal (Chain-Link Fence Accessories

2D.2 Manufacturer Obtain chain link fences and gates, including accessories, fittings, and fastenings, from a single source. Fencing (and gates) must be obtained from a qualified manufacturer having a minimum of five-years experience manufacturing chain link fencing.

Approved manufacturers: Anchor Fence Division/Master Halco Inc.

Tel. 800-229-5615 www.fenceonline.com

Merchants Metal Tel. 800.338.7684 http://www.merchantsmetals.com/default.asp

2D.3 Fabric The fabric must be helically woven from a 9 gauge (0.148” +/- 0.005”) zinc-coated (galvanized) steel wire into a 2-inch diamond mesh and must conform to the requirements of Federal Specification RR-F-191/1D and ASTM A 392 class 2. Fabric height must be 7 feet +/- 1 inch and furnished in one-piece fabric width. The standard length of fabric roll must be 50 feet +/- 1 percent. The top and bottom selvage of fabric must be twisted & barbed. The fence fabric must

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060 be within 1 inch of packed ground and will be anchored in such a manner as to preclude the fence fabric being lifted more than 4 inches from the ground. Fabric must be attached to the exterior side of line posts.

2D.4 Posts and Brace Rails All posts and brace rails must conform to the requirements of Federal Specification RR-F-191/3E and ASTM F 1083. Posts & rails must be schedule 40 steel pipe (class 1, Grade A), hot-dip zinc-coated after fabrication with 1.8 ounces of zinc per square foot of coated surface area.

Item Pipe Size Fence Industry

Pipe Size Nominal Diameter

Pipe size O.D.

Wall Thickness

Weight (Ib/L.F.)

Terminal Post 4” 3 ½” 4.000” 0.226 9.11 Line Post 2 ½” 2” 2.375” 0.154 3.65 Brace Rail 1 5/8” 1 ¼” 1.660” 0.140 2.27

• Terminal Post is an End, Corner, or Pull Post

• Round-shaped posts may be substituted with square cross-sections of equal or larger weight

• O.D. is outside diameter of pipe

• Drawings indicate Pipe Size O.D.

2D.5 Brace Rail Assembly Manufacturer’s standard adjustable brace is required for gate posts and at both sides of each terminal post.

2D.6 Truss Rods Truss Rods must be alloy steel rods conforming to ASTM A752, with minimum tensile strength of 80,000 psi, and minimum diameter of 3/8 inch. Provide rods with threaded ends and self-tightening galvanized turnbuckles. Secure truss rods to posts and gate frames with “Truss Bands” or welded anchor plates.

2D.7 Tension Bars (stretcher) One-piece lengths equal to full height of fabric -which engage each fabric link- with minimum cross-section of 0.25”x0.75”. Provide one steel tension bar for each gate and end post, and two for each corner and pull post. Tension bars must be threaded through the fabric and attached to the post by tension bands.

2D.8 Tension Bands The tension bars must be held to the fence post with 0.125”x1” pressed steel bands (clamps) in such a way to hold the fabric taut. Use 0.375” diameter by 1.5” long galvanized carriage bolts with the bands.

2D.9 Tension Wire Tension Wire must be 7 gage galvanized steel, coiled spring wire. Zinc coating must weigh no less than 1.6 ounces per square foot.

2D.10 Wire Ties Wire ties must be 9-gauge galvanized steel wire. Wire ties must not fracture when tested by being bent on a mandrel through an angle of 180 degrees.

2D.11 Hog Rings Hog rings must be 9-gauge galvanized steel for attaching fabric to tension wire.

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

2D.12 Top Guard The top guard (barbed wires and support arms) for this chain link security fence must:

1) Face outward and upward at an angle of 45 degrees from the horizontal.

2) Have barbed wire support arms that are constructed of 12-gauge (minimum) pressed steel, permanently affixed to the top of the fence posts by riveting or other approved method, to increase the overall height of the fence by a minimum of one foot.

3) Have barbed wire support arms that must be so constructed and secured to the fence post that they will withstand an actual test pull down of a vertical load of 250 pounds without sagging or bending.

4) Have 3 strands of barbed wire consisting of two twisted strands of 12 1/2-gauge galvanized steel wire with No. 14 gauge 4-point barbs spaced 5 inches apart (maximum) and stretched taut between the support arms. Conform to ASTM A 121.

5) Have the top strand of barbed wire 12 inches above and parallel to the fence line, with the remaining 2 strands spaced uniformly between top of the fence fabric and the top strand. Fasten barbed wire to the arm slot by heavy lock pins.

2D.13 Caps All exposed ends of tubular posts must be fitted with caps. The cap must fit snugly over the posts and exclude moisture such as rain. Caps must be pressed steel or malleable casting in accordance with ASTM F626. Caps must have provisions for the barbed wire support arms.

2D.14 Marking Each roll of fabric will carry a tag showing the kind of base metal (steel, aluminum, or aluminum alloy number), kind of coating, the gauge of the wire, the length of fencing in the roll, and the name of the manufacturer. Posts, wire, and other fittings will be identified as to manufacturer, kind of base metal (steel, aluminum alloy number), and kind of coating.

2D.15 Fence Installation

a) Examination

1. Verify areas to receive fencing are completed to final grades and elevations.

2. Ensure property lines and legal boundaries of work are clearly established.

b) Chain Link Fence Framing Installation

1. The fence must be installed by skilled and experienced fence erectors in accordance with the drawings, ASTM F 567 and the manufacturer's installation instructions.

2. Locate terminal post at each fence termination and change in horizontal or vertical direction of 30°or more.

3. Space line posts uniformly at 10’ maximum on center.

4. Concrete set posts: Drill holes in firm, undisturbed or compacted soil. Holes must have depths approximately 4” deeper than post bottom. Excavate deeper as required for adequate support in soft and loose soils, and for posts with heavy lateral loads. Place the fiber form Sonotube in the hole. Set post bottom 44” below surface when in firm, undisturbed soil. Place concrete around posts in a

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060 continuous pour, tamp for consolidation. Trowel finish around post. Slope to direct water away from posts.

5. Should rock be encountered at a depth less than the planned footing depth, a hole 2 inches larger than the greatest dimension of the posts will be drilled to a depth of 12 inches. After the posts are set the remainder of the drilled hole will be filled with grout, composed of one part Portland cement and two parts mortar sand. Any remaining space above the rock will be filled with concrete in the manner described above. In lieu of drilling, the rock may be excavated to the required footing depth. No extra compensation will be made for rock excavation.

6. Check each post for vertical and top alignment, and maintain in position during concrete placement and finishing operations. Ensure that post is set in the center of the sonotube. No materials will be installed on the posts, nor will the posts be disturbed in any manner within 7 days after the individual post footing is completed.

7. Bracing: Install brace assemblies so posts are plumb when diagonal rod is under proper tension. Extend braces from each terminal post to the first adjacent line post. Fasten braces securely to posts by heavy pressed steel connections and then truss braces from line post back to terminal post with 3/8-inch round truss rod complete with tightening unit.

8. Tension wire: Install tension wires before stretching fabric. Install tension wire within the top 4-inches and within the bottom 4-inches of fabric between terminal posts. Attach both ends of each tension wire to a terminal or gate post using a tension band. Attach tension wire to each line post with 9 gauge galvanized steel ties wires.

c) Chain Link Fabric Installation

1. Fabric: Install fabric on exterior side of the line post and attach so that fabric remains in tension after pulling force is released. Pull fabric taut so that the maximum deflection of fabric is 2 inches when a thirty-pound pull is exerted perpendicular to the center of the panel. Allow not more than 2” between finish grade and bottom selvage. Attach fabric with wire ties to line posts and brace rails at 14” on center. A full double twist of each wire tie is required to securely attach fabric to posts and rails. Attach fabric to tension wire with 9 gauge galvanized steel hog rings 14” on center. Crimp rings tight to prevent noise. No loose or rattling equipment will be allowed.

2. Tension bars (stretchers): Pull fabric taut; thread tension bar through fabric and attach to terminal posts with metal bands spaced maximum of 14” on center.

The bands must be placed within 4” of the top and bottom of fabric. Tighten stretcher bar bands, wire ties, and any other fasteners securely. Fabric should not be free to move along the framework.

d) Accessories

1. Tie wires: Tie wires must capture the fabric and encircle the posts to which attached. Ends of tie wires must be twisted on the secure side of the fabric not less than two full turns and bent so as not to present a hazard. All ties must be 9- gage galvanized steel and spaced no more than 14 inches on center.

2. Fasteners & Nuts: Install nuts for tension bands and carriage bolts on the side of the fence opposite the fabric side. Peen bolts or score threads to prevent removal of nuts for added security.

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

3. Barbed wire: Install three (3) strands of barbed wire parallel on each extension arm; on the exterior side of fence, unless otherwise shown. Barbed wire support arms must have a tight press-fit or must be spot-welded to preclude surreptitious removal. No loose or rattling fittings will be allowed. Pull wire taut to ninety (90) pounds of tension.

e) Cleaning Clean up debris and unused material, and remove from the site.

2E GATES

2E.1 Swing Gate

The entrance gate must be 16’ wide x 8’ high chain link double-leaf swing gate furnished complete with all hardware and accessories as required for a complete installation. Gate fabrication must be in accordance with FS RR-F-191/2E and ASTM F 900. The following requirements apply:

1) Fabric must be same type and quality as specified for fence fabric. The 7’ high fabric must be topped with additional one foot of barbed wires, same as fence.

2) Steel frame must be 1.9 O.D. (1 ½” nominal diameter) galvanized steel pipe with minimum weight of 2.72 Ib/ft. Provide additional vertical and horizontal interior members to ensure proper strength as per manufacturer recommendations. Gate frame must be of welded construction. Framework must be trussed to limit sagging and provide additional strength. Galvanized steel Tube-shaped of equal or greater weight may be used. Finish to match fence. Ground clearance must not exceed 4 inches.

3) Hardware used in the swing gate must be hot dipped galvanized steel or malleable iron shapes to suit the gate size. Hardware must have the securing bolts placed on the inside and secured to deter their unauthorized removal.

Hinges: gate hinges must be non-lift-off type, permitting gate to swing 180o. Hinges must be structurally capable of supporting the gate leaf.

Keeper: gate keeper must consist of mechanical device for securing free end of gate when in full open position.

Latch: gate latch must be forked type capable of retaining gate in closed position and have provision for padlock. Provide locking device and padlock eyes as an integral part of latch, requiring one padlock for locking both gate leaves. Latch must permit operation from either side of gate. Provide a drop rod or plunger bar arranged to engage the gate stop and hold the inactive leaf. Provide gate stop pipe to engage center drop rod. Locking devices must be constructed so that the center drop rod or plunger bar cannot be raised when the gate is locked

Padlock: Swing gate must remain securely locked (in & out) all the time. Padlocks, furnished by the contractor, must be made for outdoors use, weather resistant, and suitable for a swing gate. Provide FAA “Best” cored padlock.

4) Gate Posts must be hot dipped galvanized steel, 4-inch O.D. schedule 40 pipe (9.11 Ib./L. Ft minimum weight). Post finish to match fence.

Note: The 4” pipe may be substituted with a structural tubing TS 4 x 4 x 3/16, minimum weight is 9.42 Ib/L. Ft, Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060

ASTM A 500, Grade B, with minimum yield strength of 40,000 psi.

5) Follow manufacturer’s installation instructions to install gate plumb, level, and secure for full opening without interference. Attach hardware by means which will prevent unauthorized removal. Touch up hardware and adjust for smooth operation.

2F CONCRETE PIERS

Provide ASTM C 94 ready-mix concrete piers for all fence & gate posts, as shown on project drawings. The concrete must have a minimum 28-day compressive strength of 3,000 PSI. The concrete mix must have 6% (+/-) 1% entrained air.

a. All cylindrical concrete piers, must be formed to full depth in fiber forms. Tops of piers must be finished bell shaped within the confines of the fiber forms. No spillage (mushrooming) over the tops of forms will be permitted. Where conduit emerges from vertical surfaces of concrete piers, no appreciable amount of concrete must be permitted to spill through forms adjacent to such conduit.

b. Fiber forms for cylindrical concrete piers must be spirally constructed of laminated plies of fiber. The total wall thickness must be as published by the manufacturer. The width of each ply must not be less than 6 inches. Plies must be laminated with an adhesive of a non-water-sensitive type, with a proven record of satisfactory service in concrete forms.

The exterior surface must be uniformly wax impregnated for weather and moisture protection. The interior surface must be coated with pure polyethylene uncontaminated by paraffin or other additives. A-Coated Sonotube forms by Sonoco Products Company of Hartsville, South Carolina, are among the products that meet these specifications.

c. Remove all loose soil from bore holes so that concrete will bear on undisturbed soil.

Support forms rigidly and in proper horizontal and vertical alignment. After pouring, remove only that part of each form that will be exposed above grade. Backfill excess space between bore holes and forms with thoroughly compacted inorganic soil. Do not use sand backfill unless adjacent undisturbed soil is sand.

2G FENCE LIGHTNING PROTECTION & GROUNDING

The intended purpose of the lightning protection system is to provide preferred paths for lightning discharges to enter or leave the earth without causing facility damage or injury to personnel. The essential components of a lightning protection system are air terminals, roof and down conductors connecting to the earth electrode system (EES), and the earth electrode system. These components act together as a system to dissipate lightning currents. The lightning protection system must meet the requirements of the Lightning Protection Code, National Fire Protection Association (NFPA 780), Federal Specification No. FAA-STD-019E, and the Installation Requirements for Lightning Protection Systems, Underwriters Laboratories (UL 96A) and as specified herein & shown on drawings. All equipment used must be UL approved and marked in accordance with UL procedures.

1. Electrical grounds must be constructed at each gate post, fence corners, and at 100 feet maximum intervals, and where a power line passes over the fence. The ground must be accomplished with a solid copper or copper-clad steel rod 10 feet long and a minimum of 3/4" in diameter driven vertically until the top is 12 inches below the ground surface. A 4/0 AWG stranded bare copper conductor must be exothermic-welded to the rod and to the fence post in such a manner that each element of the fence is grounded.

2. At each ground rod location, the three security barbed wires need to be bonded to the fence post with a bare 6 AWG stranded tinned copper conductor. Bond the conductor to the fence post using a UL listed mechanical bonding connector. The #6 AWG tinned copper

Security Fence & Gates; DWC, JKI, & HJT MALSR Light Stations; Detroit Metro Airport (DTW) Spec. No. FAA-CLE-7060 conductor should not be spliced. If necessary, exothermic welds can be utilized to make two #6 AWG tinned copper conductors electrically continuous.

3. Before installing mechanical bonds or exothermic welds to a fence post, the galvanized layer of the fence post should be scraped off in areas where the metal to metal connection will be located. After the bond or weld is completed, then a galvanizing spray paint can be applied to any areas on the fence post with exposed steel. Use a color of galvanizing spray paint that matches the fence post color.

4. When overhead power lines cross a fence, bond a fence post on each side of the crossing to a ground rod with a bare 4/0 AWG copper conductor. These connections must be on each side of and at least 20 feet from the overhead wire crossing. Bond the fence fabric at the top, middle and bottom of the fence and each strand of security wire placed above the fencing fabric to the grounded post with a bare 6 AWG tinned copper conductor.

5. For gates, a horizontal bare 6 AWG stranded tinned copper conductor must be threaded continuously through the gate fabric and mechanically bonded to the vertical gate rails. Install a 1

in. by 1/8 in. flexible tinned copper bond strap or an insulated #4/0 AWG flexible (welding) copper conductor from any gate to the adjacent post (exothermic welding is recommended). Install the bonding strap from the gate to the post so it will not limit full motion of the gate (whether swing or slide type). The posts at each side of the gate must also be exothermically welded, at a height no greater than 1 foot above grade, to their respective ground rods with a #4/0 AWG bare copper cable. Interconnect the ground rods at either side of the gate with an exothermically welded 4/0 AWG bare copper conductor buried a minimum of 18 inches below grade.

6. Bond across any terminations in the security barbed wire using a short piece of the security wire material and UL listed bonding connectors. Bond the security barbed wires to the fence posts at intervals of approximately 40 feet using a 6 AWG stranded tinned copper conductor and UL listed bonding connectors.

7. Portion of fence that are within 22 feet of a facility EES (Earth electrode System) must be bonded to the EES with a 4/0 AWG bare copper conductor exothermically welded to a fence post ground rod. Connections must be made at a maximum interval of 40 feet with a minimum of two connections.

8. The Contractor must supply the correct exothermic welding kit for the application. The mold and cartridge used must be selected on the basis of size, number, and type of conductors to be connected, composition and surface shape of object, and position in which the weld will be made. Acceptable exothermic welding kits are available from Thermoweld (Continental Industries) and Cadweld (Erico Products, Inc.).

9. Electrode grounds must be tested for resistance at each location. Resistance to ground for each grounding location must be 10 ohms or less. If this value is not achieved with the grounding electrodes, as shown on the drawings, additional grounding electrodes, spaced at least 10 feet apart, or electrode extensions of the same construction and diameter, must be installed until the resistance value does not exceed the maximum of 10 ohms. A tabulated report of the final resistance value at each location must be provided to the FAA COTR.

---- End of Division 2 ---- ---- End of Specification ----