JA-5 Compiled UFC Drawings.pdf

UFC 4-022-03 "Security Engineering: Fences and Gates

19 November 2019

UFC 4-022-02

8 June 2009

Change 1, 9 August 2010

Figure 6-26 Steel Cable Barriers

6-2.10 Steel Cable-Reinforced Chain Link Fencing.

6-2.10.1 Description.

Without some reinforcement, a standard chain-link fence can be penetrated easily by a light vehicle with little or no damage. However, standard fencing can be reinforced to provide a cost-effective method to protect against the threat of penetration by light vehicles, as in Figure 6-26 and Figure 6-27. Although no required pre-tension is

2’ -0

8’-6”

2’ -0

8’-6” specified for the cable, it is generally considered acceptable that it should be snug and not have significant sag. Routine (usually daily) perimeter inspection should include checking for visible sagging. At this time, there is no specific sag measurement benchmark, so checking for “visible” sag is a conservative approach. Regularly scheduled inspections should also check for corrosion of fittings, including the turnbuckles, anchor bolts, U-bolts, any swaged fittings, and cable clamps. Cable clamps should be inspected as well to insure no nuts have become loose. For additional considerations, details, and design guidance relating to the reinforcing of fencing and gates, refer to UFC 4-022-03.

Figure 6-27 Typical Steel Cable Reinforced Chain-Link Fencing

6-2.10.2 Testing.

Sandia National Laboratories tested a barrier consisting of a chain link fence reinforced with a 3/4-in. (1.9-cm) cable. In this test, a 3,350-lb (1,523-kg) vehicle traveling at 23.5 mph (38 kph) penetrated the barrier 7 ft (2.1 m). A 4,050-lb (1,841-kg) vehicle, traveling at 50.6 mph (82 kph), penetrated 26 ft (7.9 m), and the cable failed at the impact location. A test using two cables with no fabric was impacted by a 4,000-lb (1,814-kg) vehicle, traveling at 52 mph (84 kph), and the vehicle penetrated 13 ft (4 m) and then pushed back to the original fence line. Engineering analysis of various cable restraint configurations, using the BIRM computer model (PDC-TR90-2), is shown in Table 6-9.

Table 6-9 Performance of Cable Restraint Systems

Cable Barrier w/200-ft Anchorage Spacing

Kinetic Energy in ft-lbf x 1,000 (kgf-m)

Penetration in Ft (m)

1 Cable @ 3/4-in. dia. 100 (13.8) 40 (12.2) 2 Cables @ 3/4-in. dia. 200 (27.6) 40 (12.2) 3 Cables @ 3/4-in. dia. 338 (46.7) 40 (12.2) 4 Cables @ 3/4-in. dia. 418 (57.8) 40 (12.2) 1 Cable @ 1-in. dia. 150 (20.7) 40 (12.2) 2 Cables @ 1-in. dia. 340 (47.0) 40 (12.2) 3 Cables @ 1-in. dia. 506 (70.0) 40 (12.2) 4 Cables @ 1-in. dia. 706 (97.6) 40 (12.2)

6-2.11 Reinforced Concrete Knee Walls.

6-2.11.1 Description.

When a perimeter wall or fence line needs to also serve as a vehicle barrier, it must meet passive vehicle barrier standards. This can be achieved by using a reinforced concrete knee wall structure. A knee wall barrier is a wall resting on a footing. The entire footing and part of the wall are imbedded in the existing soil or in a crushed stone mix. Figures 6-28, 6-29 and 6-30 show representative cross sections of this type of barrier.

UFC 4-022-03

1 October 2013 laid between poles with one roll on top of another or in a pyramid arrangement (minimum of 3 rolls). Concertina blades must have a minimum length of 1.2 inches (30.7 mm).

Barbed tape concertina as an expedient measure for short-term use, pending the erection of permanent fencing, can be non-reinforced. Reinforce all barbed tape concertina used for permanent security applications.

2-10 GROUNDING

Grounding and bonding of the perimeter systems must be in accordance with the National Electric Safety Code (NESC) - IEEE C2. Fences that are required to be grounded by NESC must be designed to limit touch, step, and transferred voltages in accordance with industry practices. IEEE Std 80™-2000 - IEEE Guide for Safety in AC Substation Grounding is one source that may be utilized to provide guidance in meeting these requirements.

The grounding connections must be made either to the grounding system of the enclosed equipment or to a separate ground.

1. Fences must be grounded at each side of a gate or other opening.

2. Gates must be bonded to the grounding conductor, jumper, or fence.

3. A buried bonding jumper must be used to bond across a gate or other opening in the fence, unless a nonconducting fence section is used.

4. If barbed wire strands are used above the fence fabric, the barbed wire strands must be bonded to the grounding conductor, jumper, or fence.

5. When fence posts are of conducting material, the grounding conductor must be connected to the fence post or posts, as required, with suitable connecting means

6. When fence posts are of nonconducting material, suitable bonding connection must be made to the fence mesh strands and the barbed wire strands at each grounding conductor point.

2-11 REINFORCEMENT FOR FENCING

Refer to UFC 4-022-01 and 4-022-02 for additional guidance and requirements (number and size of cables) on fence reinforcement for identified moving vehicle threat. For fabric type fences install fence reinforcement between fence fabric and fence post. For both fabric type and ornamental fences reinforcement must be installed on exterior side of fence post. If located in a corrosive environment, coated or sheathed cable may be used; however, the sheathing must be removed at the connections. See Figures 2-5/2- 6 and Appendix C for design details of fence reinforcement. See Appendix A for material specifications.

Figure 2-5 Steel Cable-Reinforced Chain Link Fence

2-11.1 Deadman Anchor

Reinforcing cables must be terminated to concrete deadman anchors. Anchors are to be placed at intervals of 200 feet (61 m) on the secure/protected side of the perimeter fencing. Offset deadman anchors from fence at the minimum distance required to avoid interference with post and to allow maintenance access to the turnbuckles, clamps, and other accessories.

The anchoring system: deadman dimensions or other anchoring systems and burial depth, eyebolt embedment depth, etc. must be designed for local soil conditions and the anticipated impact force established by the threat parameters defined in UFC 4-022-02.

See Appendix C for design details of deadman anchors.

2-11.1.1 Cable Connection

Eyebolts embedded in the concrete deadman anchors may have either a welded “T” or “L” end. The eyebolt can either be in-line with the attached cable or flush against the deadman surface. When used, eyebolts should be welded and galvanized to the anchor rods. The top side of the deadman can either be placed flush with or below the ground surface with the eye of the eyebolt above ground. Threaded rods may also be used as an alternative to the eye bolt when securing the cables to the deadman anchor.

When using threaded rods, the threaded rod and wire rope connection must be visible above ground like the eyebolt previously described.

Figure 2-6 and details in Appendix C show the deadman position using a cable clamp and turnbuckle to secure the cable rather than a swaged on clamp. This turnbuckle adds the advantage of being able to adjust the tension of the cable.

Figure 2-6: Deadman Anchor Detail

2-12 SPECIAL SECURITY FEATURES

2-12.1 Clear Zones

Clear zones are areas established around the fence to provide and unobstructed view to enhance detection and assessment around fences. When required, dimensions of clears zones vary depending on asset being protected and level of protection. For example, outer clear zones may be 30 feet (9 m) wide and inner clear zones may be 20 feet (6 m) wide. Consult with Service policies for assets being protected to determine if clear zones are required and what dimensions are required.

2-12.2 Double Fence Lines

Assets that require Electronic Security Systems (ESS) for perimeter security may require a double fence line. Perimeter ESS and double fence lines typically associated with assets that require a high level of protection for the force or covert entry tactic.

This system is intended to increase the probability of detection, decrease nuisance alarms, and prevent access to ESS. The typical configuration is outer clear zone, outer fence, isolation zone, inner fence, and inner clear zone. See Figure 2-7a/b below.

2-12.2.1 Outer Fence Line

Outer fence line acts to reduce the Nuisance Alarm Rate (NAR) by keeping animals, people, vehicles, and windblown debris out of the isolation zone. No sensors should be placed on the outer fence of a double fence line system. In some instances the outer fence line may define a protected or restricted area boundary. In the case where the outer fence line defines a protected or restricted area boundary, the outer fence must meet the minimum requirements as set forth in this UFC.

2-12.2.2 Isolation Zone

The isolation zone is the area between the inner and outer fence lines sometimes referred to as the detection zone and must meet clear zone requirements indicated above. The area must be free of all vegetation and above ground obstructions except for the ESS and its supporting infrastructure. The isolation zone is typically light colored gravel or crushed stone bed sloped to prevent standing water. This reduces maintenance, increases probability of detection, and enhances the assessment capability within the fence lines.

2-12.2.3 Inner Fence Line

The Inner fence line provides the inner boundary for the isolation zone and defines the protected or restricted area boundary. It may be used for mounting of fence line detection systems such as taut wire, Time Domain Reflectometry (TDR), or fiber-optic strain-sensitive cable systems, refer to UFC 4-021-02 for sensor types and applications.

When used as a foundation for fence line detection systems, the fence meet the following minimum requirements.

2-12.2.3.1 Inner Fence Fabric

Fence fabric material must be in accordance with ASTM A491 and must comply with minimum requirements set forth in this UFC.

2-12.2.3.2 Inner Fence Components, Fittings, and Accessories

Select the framework components and material from ASTM F626, ASTM F1043, ASTM F1083, and ASTM F1712 in addition to the following:

1. End, corner, and pull posts will be concrete filled.

2. Gateposts must be minimum of 4-inch (102 mm) outside diameter (O.D.) and be sized according to Table 2-1.

3. Three (3) tension bands must be used. Top tension wire must be 7.5-inches

(191 mm) below top of fabric with the other two (2) bands located approximately 31(787) and 56.5 (1435) inches (mm) down respectively from the top of fence fabric.

Table 2-1 Fence Type Components

Figure 2-7a: Double Fence Line

PIPE SIZE

Bottom or Brace Rails 1 5/8 in (41mm) Line Posts 2 ½ in (63.5mm) Corner, end and pull posts) 4 in (102mm) Single Gate Posts – equal or less than 12ft (3.7m) Width 4 in (102mm) Double Gate Posts – equal or less than 24ft (7.3m) Width 4 in (102mm) Single Gate Posts – greater than 12ft (3.7m and less than 18ft (5.5m) Width 6 5/8 in (168 mm)

Double Gate Posts – greater than 24ft (7.3m) and less than 36ft (11m) Width 6 5/8 in (168 mm)

Single Gate Posts – over 18ft (5.5m) Width 8 5/8 in (219 mm) Double Gate Posts – over 36ft (11m) Width 8 5/8 in (219 mm)

USACE / NAVFAC / AFCEC / NASA UFGS- 32 31 13 ( November 2016) Change 1 - 05/ 17 Pr epar i ng Act i v i t y: NASA Super sedi ng UFGS- 32 31 13 ( August 2010)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Jul y 2019

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 31 13

CHAIN LINK FENCES AND GATES

11/16

PART 1 GENERAL

1.1 REFERENCES

1.2 SUBMITTALS

1.3 QUALITY CONTROL

1.3.1 Certificates of Compliance

1.4 DELIVERY, STORAGE, AND HANDLING

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.2 COMPONENTS

2.2.1 Fabric

2.2.1.1 Top and Bottom Selvages

2.2.2 Posts [, Rails] and Braces

2.2.2.1 Composite Posts

2.2.3 Line Posts

2.2.4 End, Corner, and Pull Posts

2.2.5 Sleeves

2.2.6 Top Rail

2.2.7 Center Rails Between Line Posts

2.2.8 Bottom Rail

2.2.9 Post-Brace Assembly

2.2.10 Stretcher Bars

2.2.11 Stretcher Bar Bands

2.2.12 Post Tops

2.2.13 Gate Posts

2.2.14 Gates

2.2.15 Gate Hardware and Accessories

2.2.16 Miscellaneous Hardware

2.2.17 Wire Ties

2.2.18 Padlocks

2.3 MATERIALS

2.3.1 Zinc Coating

2.3.2 Tension Wire

SECTION 32 31 13 Page 1

2.3.3 Concrete

2.3.4 Grout

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 Clearing and Grading

3.2 INSTALLATION

3.2.1 Security

3.2.2 Fence Installation

3.2.2.1 Post Spacing

3.2.2.2 Top and Bottom Tension Wire

3.2.3 Excavation

3.2.4 Setting Posts

3.2.4.1 Earth and Bedrock

3.2.4.2 Concrete Slabs and Walls

3.2.4.3 Bracing

3.2.5 Concrete Strength

3.2.6 Top Rails

3.2.7 Center Rails

3.2.8 Brace Assembly

3.2.9 Tension Wire Installation

3.2.10 Fabric Installation

3.2.11 Stretcher Bar Installation

3.2.12 Gate Installation

3.2.13 Tie Wires

3.2.14 Fasteners

3.2.15 Zinc-Coating Repair

3.2.16 Accessories Installation

3.2.16.1 Post Caps

3.2.16.2 Padlocks

3.2.17 Grounding

3.3 CLOSEOUT ACTIVITIES

-- End of Section Table of Contents --

SECTION 32 31 13 Page 2

USACE / NAVFAC / AFCEC / NASA UFGS- 32 31 13 ( November 2016) Change 1 - 05/ 17 Pr epar i ng Act i v i t y: NASA Super sedi ng UFGS- 32 31 13 ( August 2010)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Jul y 2019

SECTION 32 31 13

CHAIN LINK FENCES AND GATES

11/16

NOTE: Thi s gui de speci f i cat i on cover s t he r equi r ement s f or st eel f enci ng, i ncl udi ng post s, f abr i c, gat es, and mi scel l aneous accessor i es.

Col or ed f abr i c and accessor i es may be used i f r equi r ed. Edi t speci f i cat i ons t o sui t t he pr oj ect scope.

Use Sect i on 32 31 13. 53 HI GH- SECURI TY CHAI N LI NK FENCES AND GATES when cover i ng t he r equi r ement s f or chai n l i nk f ence f or hi gh secur i t y appl i cat i ons.

Adher e t o UFC 1-300-02 Uni f i ed Faci l i t i es Gui de Speci f i cat i ons ( UFGS) For mat St andar d when edi t i ng t hi s gui de speci f i cat i on or pr epar i ng new pr oj ect speci f i cat i on sect i ons. Edi t t hi s gui de speci f i cat i on f or pr oj ect speci f i c r equi r ement s by addi ng, del et i ng, or r evi s i ng t ext . For br acket ed i t ems, choose appl i cabl e i t em( s) or i nser t appr opr i at e i nf or mat i on.

Remove i nf or mat i on and r equi r ement s not r equi r ed i n r espect i ve pr oj ect , whet her or not br acket s ar e present.

Comment s, suggest i ons and r ecommended changes f or t hi s gui de speci f i cat i on ar e wel come and shoul d be submi t t ed as a Criteria Change Request (CCR) .

PART 1 GENERAL

1.1 REFERENCES

NOTE: Thi s par agr aph i s used t o l i s t t he publ i cat i ons c i t ed i n t he t ext of t he gui de speci f i cat i on. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y and l i s t ed i n t hi s par agr aph by or gani zat i on, desi gnat i on, dat e, and t i t l e.

SECTION 32 31 13 Page 3

Use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e when you add a Ref er ence I dent i f i er ( RI D) out si de of t he Sect i on' s Ref er ence Ar t i c l e t o aut omat i cal l y pl ace t he r ef er ence i n t he Ref er ence Ar t i c l e. Al so use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e t o updat e t he i ssue dat es.

Ref er ences not used i n t he t ext wi l l aut omat i cal l y be del et ed f r om t hi s sect i on of t he pr oj ect speci f i cat i on when you choose t o r econci l e r ef er ences i n t he publ i sh pr i nt pr ocess.

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM A90/A90M (2013; R 2018) Standard Test Method for Weight [Mass] of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings

ASTM A116 (2011) Standard Specification for Metallic-Coated, Steel Woven Wire Fence Fabric

ASTM A153/A153M (2016) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A702 (2013) Standard Specification for Steel Fence Posts and Assemblies, Hot Wrought

ASTM A780/A780M (2009; R 2015) Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM B117 (2016) Standard Practice for Operating Salt Spray (Fog) Apparatus

ASTM C94/C94M (2018) Standard Specification for Ready-Mixed Concrete

ASTM F567 (2014a) Standard Practice for Installation of Chain Link Fence

ASTM F626 (2014) Standard Specification for Fence Fittings

ASTM F883 (2013) Padlocks

ASTM F1043 (2018) Standard Specification for Strength and Protective Coatings on Steel Industrial Fence Framework

ASTM F1083 (2018) Standard Specification for Pipe, Steel, Hot-Dipped Zinc Coated (Galvanized)

SECTION 32 31 13 Page 4

Welded, for Fence Structures

ASTM G152 (2013) Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials

ASTM G153 (2013) Operating Enclosed Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials

ASTM G154 (2016) Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials

ASTM G155 (2013) Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials

U.S. GENERAL SERVICES ADMINISTRATION (GSA)

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 F) 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; Am 1) 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)

1.2 SUBMITTALS

NOTE: Revi ew Submi t t al Descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect .

The Gui de Speci f i cat i on t echni cal edi t or s have desi gnat ed t hose i t ems t hat r equi r e Gover nment appr oval , due t o t hei r compl exi t y or cr i t i cal i t y, wi t h a " G. " Gener al l y, ot her submi t t al i t ems can be r evi ewed by t he Cont r act or ' s Qual i t y Cont r ol Syst em. Onl y add a “ G” t o an i t em, i f t he submi t t al i s suf f i c i ent l y i mpor t ant or compl ex i n cont ext of t he pr oj ect .

For submi t t al s r equi r i ng Gover nment appr oval on Ar my pr oj ect s, a code of up t o t hr ee char act er s wi t hi n t he submi t t al t ags may be used f ol l owi ng t he " G" desi gnat i on t o i ndi cat e t he appr ovi ng aut hor i t y.

Codes f or Ar my pr oj ect s usi ng t he Resi dent

SECTION 32 31 13 Page 5

Management Syst em ( RMS) ar e: " AE" f or Ar chi t ect - Engi neer ; " DO" f or Di st r i ct Of f i ce ( Engi neer i ng Di v i s i on or ot her or gani zat i on i n t he Di st r i ct Of f i ce) ; " AO" f or Ar ea Of f i ce; " RO" f or Resi dent Of f i ce; and " PO" f or Pr oj ect Of f i ce. Codes f ol l owi ng t he " G" t ypi cal l y ar e not used f or Navy, Ai r For ce, and NASA pr oj ect s.

An " S" f ol l owi ng a submi t t al i t em i ndi cat es t hat t he submi t t al i s r equi r ed f or t he Sust ai nabi l i t y eNot ebook t o f ul f i l l f eder al l y mandat ed sust ai nabl e r equi r ement s i n accor dance wi t h Sect i on 01 33 29 SUSTAI NABI LI TY REPORTI NG. Locat e t he " S" submi t t al under t he SD number t hat best descr i bes t he submi t t al i t em.

Choose t he f i r st br acket ed i t em f or Navy, Ai r For ce and NASA pr oj ect s, or choose t he second br acket ed i t em f or Ar my pr oj ect s.

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are [for Contractor Quality Control approval.][for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.] Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section

01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Fence Assembly ; G[, [____]]

Location of Gate, Corner, End, and Pull Posts ; G[, [____]]

Gate Assembly ; G[, [____]]

Gate Hardware and Accessories ; G[, [____]]

Erection/Installation Drawings ; G[, [____]]

SD-03 Product Data

Fence Assembly ; G[, [____]]

Gate Assembly ; G[, [____]]

Gate Hardware and Accessories ; G[, [____]]

Zinc Coating ; G[, [____]]

PVC Coating ; G[, [____]]

Aluminum Alloy Coating ; G[, [____]]

Fabric ; G[, [____]]

Stretcher Bars ; G[, [____]]

SECTION 32 31 13 Page 6

Concrete ; G[, [____]]

SD-04 Samples

Fabric ; G[, [____]]

Posts ; G[, [____]]

Braces ; G[, [____]]

Line Posts ; G[, [____]]

Sleeves ; G[, [____]]

Top Rail ; G[, [____]]

Bottom Rail ; G[, [____]]

Tension Wire ; G[, [____]]

Stretcher Bars ; G[, [____]]

Gate Posts ; G[, [____]]

Gate Hardware and Accessories ; G[, [____]]

[ Padlocks ; G[, [____]]

] Wire Ties ; G[, [____]]

SD-07 Certificates

Certificates of Compliance

SD-08 Manufacturer's Instructions

Fence Assembly

Gate Assembly

Hardware Assembly

Accessories

SD-11 Closeout Submittals

Recycled Material Content [; S]

1.3 QUALITY CONTROL

1.3.1 Certificates of Compliance

Submit certificates of compliance in accordance with the applicable reference standards and descriptions of this section for the following:

a. Zinc coating

b. PVC coating

SECTION 32 31 13 Page 7

c. Aluminum alloy coating

d. Fabric

e. Stretcher bars

f. Gate hardware and accessories

g. Concrete

1.4 DELIVERY, STORAGE, AND HANDLING

Deliver materials to site in an undamaged condition. Store materials off the ground to provide protection against oxidation caused by ground contact.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Provide fencing materials conforming to the requirements of ASTM A116, ASTM A702, ASTM F626.

Submit reports of listing chain-link fencing and accessories regarding weight in grams ounces for zinc coating[, thickness of PVC coating ][, and chemical composition and thickness of aluminum alloy coating ].

Submit manufacturer's catalog data for complete fence assembly , gate assembly , hardware assembly and accessories .

2.2 COMPONENTS

2.2.1 Fabric

NOTE: Coor di nat e t ype of f abr i c wi t h pr oj ect r equi r ement s. The f our t ypes of f abr i c ar e not necessar i l y equi val ent . Cer t ai n secur i t y appl i cat i ons may r equi r e use of st eel f abr i c onl y.

St andar d sel vage t r eat ment f or f abr i c 1. 52 m 60 inches and l ess i s knuckl ed at bot h sel vages.

Fabr i c wi t h heavi er z i nc or al umi num coat i ng or pol yvi nyl chl or i de ( PVC) coat i ngs may be usef ul i n hi ghl y cor r osi ve envi r onment s.

NOTE: Choose cor e wi r e gage appr opr i at e f or t he desi gn. Gages ar e not t he same f or al l mat er i al s.

Pol yvi nyl chl or i de ( PVC) coat i ng may be speci f i ed f or ot her t han secur i t y pur poses when aest het i cs ar e of pr i me i mpor t ance and t he addi t i onal cost i s j ust i f i ed. Ther e ar e di f f er ent PVC- coat ed f abr i cs on t he mar ket . Var i at i ons may i ncl ude: The met hods of appl y i ng PVC coat i ng, wal l t hi ckness of PVC coat i ng, adhesi on of PVC coat i ng t o wi r e, and cost .

Take t hese f act or s i nt o consi der at i on when sel ect i ng a f ence f abr i c f or di f f er ent envi r onment al

SECTION 32 31 13 Page 8 appl i cat i ons. PVC coat i ng of f enci ng f or cer t ai n secur i t y appl i cat i ons and gr ounded f enci ng r equi r es det ai l ed desi gn and speci f y i ng.

FS RR-F-191 and detailed specifications as referenced and other requirements as specified.

FS RR-F-191/1 ; Type [I, zinc-coated steel, [_____] gage] [II, aluminum-coated steel, [_____] gage] [III, aluminum alloy, [_____] gage] [or] [IV, polyvinyl chloride (PVC) coated over zinc- or aluminum-coated steel, [_____]-gage core wire size]. Mesh size, 51 mm 2 inches . Provide selvage [knuckled at one selvage and twisted and barbed at the other] [twisted and barbed at both selvages] [knuckled at both selvages]. Height of fabric, as indicated.

Provide fabric consisting of 3.8 millimeter No. 9-gage wires woven into a [25] [45] [50] millimeter [1 inch] [1-3/4 inch] [2 inch] diamond mesh, with dimensions of fabric and wire conforming to ASTM A116, with [370] [610] gram per square meter [1.20] [2.0] ounces per square foot zinc galvanizing.

Provide one-piece fabric widths for fence heights up to[ 3658 millimeter 12 feet ][_____].

2.2.1.1 Top and Bottom Selvages

Provide knuckled selvages at top and bottom for fabric with 51 millimeter 2 inch mesh and up to 1524 millimeter 60 inches high, and if over 1524 millimeter 60 inches high, provide twisted and barbed top selvage and knuckled bottom selvage.

Knuckle top and bottom selvages for 45 millimeter and 25 millimeter 1-3/4 inch and 1 inch mesh fabric.

2.2.2 Posts [, Rails] and Braces

NOTE: Use as many of t he opt i ons as possi bl e consi st ent wi t h f unct i onal r equi r ement s. Al l ow Cl ass 3, f or med st eel sect i ons as an al t er nat i ve i f no ot her r equi r ement s pr ohi bi t t hei r use on a par t i cul ar j ob. Cer t ai n secur i t y appl i cat i ons usi ng i nt r usi on det ect i on sensor s use st eel pi pe f r amewor k onl y. For r ai l s and br aces, use mi ni mum si zes speci f i ed i n FS RR- F- 191/ 3 f or each cl ass and gr ade unl ess member s ar e t o be over si zed.

NOTE: St eel pi pe i s avai l abl e i n t wo gr ades: A or B. Gr ade A i s z i nc- coat ed wi t h 0. 54 kg per squar e meter 1. 8 ounces per squar e f oot of z i nc. Gr ade B consi st s of a z i nc- coat i ng wi t h 0. 27 kg per squar e meter 0. 9 ounce per squar e f oot , a chr omat e conver si on coat i ng, f ol l owed by a c l ear acr yl i c or pol yest er coat i ng. The acr yl i c or pol yest er coat i ngs used on Gr ade B pi pe shoul d not be conf used wi t h opt i onal pol yvi nyl chl or i de ( PVC) coat i ngs

SECTION 32 31 13 Page 9 avai l abl e f or f r amewor k. Gr ade A pi pe whi ch has t he heavi er z i nc- coat ed i nt er i or may be desi r ed i n some coast al r egi ons l ocat ed i n hi ghl y cor r osi ve sal t - l aden envi r onment s t o pr event r ust caused by condensat i on i nsi de t he pi pe. Gr ade A or Gr ade B pi pe may be used i n i nl and and deser t ar eas, pr ovi ded Gr ade B pi pe meet s t he sal t spr ay t est .

FS RR-F-191/3 line posts; Class [1, steel pipe, Grade [A] [or] [B]] [2, aluminum pipe] [3, formed steel sections] [4, steel H sections] or [5, aluminum H sections]. End, corner, and pull posts; Class [1, steel pipe, Grade [A] [or] [B]], [2, aluminum pipe], [6, steel square sections] [or 7, aluminum square sections]. Braces [and rails]; Class [1, steel pipe, Grade [A] [or] [B]] [2, aluminum pipe] or [3, formed steel sections], in [minimum sizes listed in FS RR-F-191/3 for each class and grade] [size [_____]]. [Provide PVC color coating, minimum thickness, 0.25 mm 0.01 inch .] [Steel pipe, Class 1, Grade B meeting the following performance criteria when subjected to salt spray testing in accordance with ASTM B117:

a. Exterior [_____] 1,000 hours with maximum 5 percent red rust.

b. Interior [_____] 650 hours with maximum 5 percent red rust. ]

2.2.2.1 Composite Posts

NOTE: Pr ovi de as al t er nat i ve t o PVC coat ed f ence post s, and use wher e cor r osi on i s a pr obl em. Si nce post s ar e non- conduct i ve, f ence gr oundi ng pr ocedur es need t o be det ai l ed wher e gr oundi ng of t he f ence i s required.

Produce resin reinforced posts from polyester or epoxy resin, reinforced with E-glass and filler material. Provide post that meet the ASTM F1043 bending strength for heavy industrial fencing, and filled with 20 MPa 3,000 psi concrete. Protect posts from UV degradation by a veil of polyester cloth impregnated with resin and an acrylic based 1.46 mm 1.5 mil DFT coating system. The post can exhibit no structural failure (less than 10 percent loss of strength) as a result of exposure to moisture and UV lamps per ASTM G152, ASTM G153, ASTM G155, and ASTM G154, (3600 hours). Provide posts [green], [black], [brown] in color to match fabric. [Provide outside diameter as specified in FS RR-F-191/3 for round steel pipe.]

2.2.3 Line Posts

Minimum acceptable line posts are as follows:

Up to 1829 millimeter 6 feet high:

Grade A: DN50 1.900 inch O.D. pipe weighing 4.05 kilogram per linear meter 2.72 pounds per linear foot .

Grade B: DN60 2.375 inch O.D. pipe weighing 4.65 kilogram per linear meter 3.12 pounds per linear foot .

Over 1829 millimeter 6 feet high:

SECTION 32 31 13 Page 10

DN50 2.0 inch O.D. pipe weighing 5.44 kilogram per linear meter 3.65 pounds per linear foot .

2.2.4 End, Corner, and Pull Posts

Provide minimally acceptable end, corner, and pull posts as follows:

Up to 1829 millimeter 6 feet high:

Grade A: DN50 2.375 inch O.D. pipe weighing 5.44 kilogram per linear meter 3.65 pounds per linear foot .

Grade B: DN60 2.375 inch O.D. pipe weighing 4.65 kilogram per linear meter 3.12 pounds per linear foot .

Over 1829 millimeter 6 feet high:

Grade A: DN70 2.875 inch O.D. pipe weighing 8.62 kilogram per linear meter 5.79 pounds per linear foot .

Grade B: DN70 2.875 inch O.D. pipe weighing 6.91 kilogram per linear meter 4.64 pounds per linear foot .

2.2.5 Sleeves

Provide sleeves for setting into concrete construction of the same material as post sections, sized 25 millimeter 1 inch greater than the diameter or dimension of the post. Weld flat plates to each sleeve base to provide anchorage and prevent intrusion of concrete.

2.2.6 Top Rail

Provide top rails with [a minimum of DN40 1.660 inches O.D. pipe rails.][Grade A weighing 3.38 kilogram per linear meter 2.27 pounds per linear foot .] [Grade B weighing 2.71 kilogram per linear meter 1.82 pounds per linear foot .] Provide expansion couplings 150 millimeter 6 inches long at each joint in top rails.

[ 2.2.7 Center Rails Between Line Posts

NOTE: Cent er r ai l s ar e not nor mal l y r equi r ed f or f enci ng l ess t han 1829 mi l l i met er 6 f eet hi gh. Edi t as r equi r ed.

For fencing over 1829 millimeter 6-feet high, provide DN40 1.660 inches O.D. pipe center rails, [Grade A weighing 3.38 kilogram per linear meter

2.27 pounds per linear foot ] [Grade B weighing 2.71 kilogram per linear meter 1.82 pounds per linear foot .]

] [ 2.2.8 Bottom Rail

Provide bottom rail conforming to minimum sizes specified in FS RR-F-191/3 for each class and grade unless members are to be oversized.

SECTION 32 31 13 Page 11

] 2.2.9 Post-Brace Assembly

Provide bracing consisting of DN40 1.660 inches O.D. pipe [Grade A weighing 3.38 kilogram per linear meter 2.27 pounds per linear foot ] [Grade B weighing 2.71 kilogram per linear meter 1.82 pounds per linear foot ] and 10 millimeter 3/8 inch adjustable truss rods and turnbuckles.

2.2.10 Stretcher Bars

Provide bars that have one-piece lengths equal to the full height of the fabric with a minimum cross section of 5 by 20 millimeter 3/16 by 3/4 inch , in accordance with ASTM F626.

2.2.11 Stretcher Bar Bands

Provide bar bands for securing stretcher bars to posts that are steel, wrought iron, or malleable iron spaced not over 381 millimeter 15 inches on center. Bands may also be used in conjunction with special fittings for securing rails to posts. Provide bands with projecting edges chamfered or eased.

2.2.12 Post Tops

Provide tops that are steel, wrought iron, or malleable iron designed as a weathertight closure cap. Provide one cap for each post, unless equal protection is provided by a combination post-cap and wire supporting arm.

Provide caps with an opening to permit through passage of the top rail.

2.2.13 Gate Posts

Provide a gate post for supporting each gate leaf as follows:

[ Up to 1829 millimeter 6-feet wide:

DN75 2.875 inch O.D. pipe [Grade A weighing 8.62 kilogram per linear meter 5.79 pounds per linear foot .] [Grade B weighing 6.91 kilogram per linear meter 4.64 pounds per linear foot .]

][ Over 1829 millimeter 6 feet wide and up to 3962 millimeter 13 feet wide:

DN75 2.875 inch O.D. pipe [Grade A weighing 8.62 kilogram per linear meter 5.79 pounds per linear foot .] [Grade B weighing 6.91 kilogram per linear meter 4.64 pounds per linear foot .]

][ Over 3962 millimeter 13-feet and up to 5486 millimeter 18-feet wide:

Provide DN150 6.625 inch O.D. pipe weighing 28.26 kilogram per linear meter 18.97 pounds per linear foot .

] [Over 5486 millimeter 18-feet wide:

Provide DN220 8.625 inch O.D. pipe weighing 36.79 kilogram per linear meter 24.70 pounds per linear foot .

] 2.2.14 Gates

NOTE: The gat e f r ames and i nt er medi at e br aces i ndi cat ed ar e adequat e f or gat e s i zes l ess t han or

SECTION 32 31 13 Page 12 equal t o 2. 4 m 8 f eet hi gh and 4. 3 m 14 f eet wi de.

Gat e conf i gur at i ons l ar ger t han 2. 4 m 8 f eet hi gh and

4. 3 m 14 f eet wi de r equi r e speci al desi gn consideration.

FS RR-F-191/2 ; Type [I, single swing] [II, double swing] [III, single cantilever sliding, wheel sliding gate] [IV, double cantilever sliding] [V, single overhead sliding] [VI, double overhead sliding] [VII, vertical lift] [VIII, special]. Shape and size of gate frame, [as indicated] [_____]. Framing and bracing members, [round][square] of [steel][aluminum] alloy. [Steel member finish, [zinc-coated] [or] [PVC-coated over zinc- or aluminum-coated steel].] Provide gate frames and braces of minimum sizes listed in FS RR-F-191/3 for each Class and Grade, except that steel pipe frames are a minimum of 48 mm 1.90 inches o.d., 3 mm 0.120 inches minimum wall thickness and aluminum pipe frames and intermediate braces are 47.5 mm 1.869 inches o.d. minimum, 1.4 kg per meter 0.940 lb/ft of length. Gate fabric, is as specified for fencing fabric. Coating for steel latches, stops, hinges, keepers, and accessories, is [galvanized] [PVC, minimum thickness of 0.25 mm 0.01 inch .] Provide [fork] [plunger bar] type gate latches. [Special gate frames, [as indicated] [_____].] [Provide intermediate members as necessary for gate leaves more than 2.4 m 8 feet wide, to provide rigid construction, free from sag or twist.] [Provide truss rods or intermediate braces for gate leaves less than 2.4 m 8 feet wide.] Attach gate fabric to gate frame in accordance with manufacturer's standards, except that welding is not permitted. Arrange padlocking latches to be accessible from both sides of gate, regardless of latching arrangement.

[ For gate leaves up to 1829 millimeter 6 feet high or 1829 millimeter 6 feet wide, provide perimeter gate frames of DN32 1.66 inch O.D. pipe [Grade A weighing 3.38 kilogram per linear meter 2.27 pounds per linear foot .] [Grade B weighing 2.71 kilogram per linear meter 1.82 pounds per linear foot .]

][ For gate leaves over 1829 millimeter 6 feet high or 1829 millimeter 6 feet wide, provide perimeter gate frames of DN40 1.90 inch O.D. pipe [Grade A weighing 4.05 kilogram per linear meter 2.72 pounds per linear foot .] [Grade B weighing 3.40 kilogram per linear meter 2.28 pounds per linear foot .]

] Provide gate frame assembly that is welded or assembled with special malleable or pressed-steel fittings and rivets to provide rigid connections. Install fabric with stretcher bars at vertical edges;

stretcher bars may also be used at top and bottom edges. Attach stretcher bars and fabric to gate frames on all sides at intervals not exceeding 381 millimeter 15 inches . Attach hardware with rivets or by other means which provides equal security against breakage or removal.

Provide diagonal cross-bracing, consisting of 10 millimeter 3/8 inch diameter adjustable-length truss rods on welded gate frames, where necessary to obtain frame rigidity without sag or twist. Provide nonwelded gate frames with diagonal bracing.

2.2.15 Gate Hardware and Accessories

Provide gate hardware and accessories that conforms to ASTM A116 and ASTM F626, and be as specified:

SECTION 32 31 13 Page 13

Provide [malleable iron] [forged steel] [pressed steel] hinges to suit gate size, non-lift-off type, offset to permit 180-degree opening.

Provide latch that permits operation from either side of the gate, with a padlock eye provided as an integral part of the latch.

Provide stops and holders of malleable iron for vehicular gates. Provide stops that automatically engage the gate and hold it in the open position until manually released.

NOTE: Del et e t he f ol l owi ng par agr aph when doubl e gat es ar e not r equi r ed.

[ Provide double gates with a cane bolt and ground-set keeper, with latch or locking device and padlock eye designed as an integral part.

NOTE: Del et e t he f ol l owi ng par agr aph i f manual s l i di ng gat es ar e not r equi r ed.

[ Provide manufacturer's standard heavy-duty track ball bearing hanger sheaves, overhead framing and supports, guides, stays, bracing, and accessories as required for easy operation of manual sliding gates.

] 2.2.16 Miscellaneous Hardware

Provide miscellaneous hot-dip galvanized hardware as required.

2.2.17 Wire Ties

Provide[ 2.3 millimeter 11-gage ][ 2.9 millimeter 9-gage ][_____] galvanized steel wire for tying fabric to line posts,spaced 300 millimeter 12 inches on center. For tying fabric to rails and braces, space wire ties 600 millimeter 24 inches on center. For tying fabric to tension wire, space

2.7 millimeter 0.105-inch hog rings 600 millimeter 24 inches on center.

Manufacturer's standard procedure will be accepted if of equal strength and durability.

NOTE: Speci f y pol yvi nyl chl or i de ( PVC) coat ed t i es when PVC- coat ed f ence f abr i c i s r equi r ed.

FS RR-F-191/4 . Provide wire ties constructed of the same material as the fencing fabric. [Provide accessories with polyvinyl (PVC) coatings similar to that specified for chain-link fabric or framework.]

[ 2.2.18 Padlocks

NOTE: Consul t st at i on r egar di ng padl ocks. Most st at i ons wi l l pr ovi de padl ocks. I f Cont r act or f ur ni shed padl ocks ar e r equi r ed f or cer t ai n secur i t y appl i cat i ons, a padl ock conf or mi ng t o an appr opr i at e Mi l i t ar y or Agency Speci f i cat i on may need t o be

SECTION 32 31 13 Page 14 speci f i ed. See r ef er enced speci f i cat i on f or t ypes, gr ades, and opt i ons avai l abl e.

Provide padlocks conforming to ASTM F883, with chain.

] 2.3 MATERIALS

2.3.1 Zinc Coating

Provide hot-dip galvanized (after fabrication) ferrous-metal components and accessories, except as otherwise specified.

Provide zinc coating of weight not less than 550 gram per square meter

1.94 ounces per square foot , as determined from the average result of two specimens, when tested in accordance with ASTM A90/A90M.

Provide zinc coating conforming to the requirements of the following:

a. Pipe: FS RR-F-191/3 Class 1 [Grade A in accordance with ASTM F1083] [Grade B in accordance with ASTM F1043].

b. Hardware and accessories: ASTM A153/A153M , Table 1

c. Surface: ASTM F1043

d. External: Type B-B surface zinc with organic coating, 275 gram per square meter 0.97 ounce per square foot minimum thickness of acrylated polymer.

e. Internal: Surface zinc coating of 275 gram per square meter 0.97 ounce per square foot minimum.

Provide galvanizing repair material that is cold-applied zinc-rich coating conforming to ASTM A780/A780M .

2.3.2 Tension Wire

Provide galvanized, coiled spring wire, No. 7-gage . Provide zinc coating that weighs not less than [370] [610] gram per square meter [1.2] [2.0] ounces per square foot .

2.3.3 Concrete

Provide concrete conforming to ASTM C94/C94M, and obtaining a minimum 28-day compressive strength of 20685 kilopascal 3,000 psi .

2.3.4 Grout

Provide grout of proportions one part portland cement to three parts clean, well-graded sand and a minimum amount of water to produce a workable mix.

PART 3 EXECUTION

Submit manufacturer's erection/installation drawings and instructions that detail proper assembly and materials in the design for fence, gate, hardware and accessories.

SECTION 32 31 13 Page 15

Provide complete installation conforming to ASTM F567.

3.1 PREPARATION

Ensure final grading and established elevations are complete prior to commencing fence installation.

3.1.1 Clearing and Grading

Clear fence line of trees, brush, and other obstacles to install fencing for a distance of [_____] meters feet inside; and [_____] meters feet outside the fence. Establish a graded, compacted fence line prior to fencing installation.

3.2 INSTALLATION

[ 3.2.1 Security

NOTE: Del et e t hi s par agr aph i f new f enci ng does not i nvol ve r el ocat i on or r epl acement of exi st i ng f enci ng. Dependi ng on nat ur e of f ence wor k, par agr aph may need f ur t her el abor at i on r egar di ng necessar y const r uct i on t o mai nt ai n per i met er .

Install new chain link fencing, remove existing fencing, and perform related work to provide continuous security for facility. Schedule and fully coordinate work with Contracting Officer and cognizant Security Officer.

] 3.2.2 Fence Installation

NOTE: Cer t ai n secur i t y appl i cat i ons r equi r e conf or mance t o an appl i cabl e OPNAVI NST. Use br acket ed sent ences as r equi r ed by t he appl i cabl e

OPNAVINST.

Install fence on prepared surfaces to line and grade indicated. [Secure fastening and hinge hardware in place to fence framework by peening or welding. Allow for proper operation of components. Coat peened or welded areas with a repair coating matching original coating.] Install fence in accordance with fence manufacturer's written installation instructions except as modified herein.

3.2.2.1 Post Spacing

Provide line posts spaced equidistantly apart, not exceeding 3.048 m 10 feet on center. Provide gate posts spaced as necessary for size of gate openings. Do not exceed 152.4 m 500 feet on straight runs between braced posts. Provide corner or pull posts, with bracing in both directions, for changes in direction of 0.26 rad 15 degrees or more, or for abrupt changes in grade. Submit drawings showing location of gate, corner, end, and pull posts .

SECTION 32 31 13 Page 16

3.2.2.2 Top and Bottom Tension Wire

NOTE: Coor di nat e wi t h r equi r ement s f or t op and bot t om r ai l s. Speci f y bot t om t ensi on wi r e t o mai nt ai n f ence al i gnment , except f or desi gns r equi r i ng bot t om r ai l .

Install [top] [and] [bottom] tension wires before installing chain-link fabric, and pull wires taut. Place top and bottom tension wires within 203 mm 8 inches of respective fabric line.

3.2.3 Excavation

Provide excavations for post footings which are [drilled holes] in virgin or compacted soil, of minimum sizes as indicated.

Space footings for line posts 3048 millimeter 10 feet on center maximum and at closer intervals when indicated, with bottoms of the holes approximately 75 millimeter 3 inches below the bottoms of the posts. Set bottom of each post not less than 915 millimeter 36 inches below finished grade when in firm, undisturbed soil. Set posts deeper, as required, in soft and problem soils and for heavy, lateral loads.

[ Uniformly spread soil from excavations adjacent to the fence line or on areas of Government property, as directed.] [Remove excavated soil from Government property.

] When solid rock is encountered near the surface, drill into the rock at least 305 millimeter 12 inches for line posts and at least 457 millimeter 18 inches for end, pull, corner, and gate posts. Drill holes at least

25.4 millimeter 1 inch greater in diameter than the largest dimension of the placed post.

If solid rock is below the soil overburden, drill to the full depth required except that penetration into rock need not exceed the minimum depths specified above.

3.2.4 Setting Posts

Remove loose and foreign materials from holes and moisten the soil prior to placing concrete.

Provide tops of footings that are trowel finished and sloped or domed to shed water away from posts. Set hold-open devices, sleeves, and other accessories in concrete.

Keep exposed concrete moist for at least 7 calendar days after placement or cured with a membrane curing material, as approved.

[ Grout all posts set into sleeved holes in concrete with an approved grouting material.

] Maintain vertical alignment of posts in concrete construction until concrete has set.

SECTION 32 31 13 Page 17

3.2.4.1 Earth and Bedrock

NOTE: Al t er nat e dr i ve anchor met hod may be speci f i ed as an opt i on wher e evi dence i ndi cat es t hat opt i onal met hod under s i mi l ar gr ound condi t i ons has sat i sf act or y and pr oven per f or mance r ecor d.

Provide concrete bases of dimensions indicated on the manufactures installation drawings[, except in bedrock]. Compact concrete to eliminate voids, and finish to a dome shape. [In bedrock, set posts with a minimum of 25.4 mm 1 inch of grout around each post. Work grout into hole to eliminate voids, and finish to a dome shape.]

[ 3.2.4.2 Concrete Slabs and Walls

NOTE: Use t he f ol l owi ng par agr aph wher e r equi r ed by t he desi gn, ot her wi se del et e. Sl eeve j oi nt s f or non- r emovabl e f ence sect i ons ar e usual l y f i l l ed wi t h l ead or nonshr i nk gr out . Removabl e f ence sect i ons may be usef ul as an economi cal means f or pr ovi di ng access t o equi pment . Sl eeve j oi nt s i n r emovabl e f ence sect i ons may be a t i ght s l i di ng t ype, or wher e moi st ur e ent r y coul d be a pr obl em, f i l l ed wi t h pi pe sul phur j oi nt i ng compound.

Set posts into zinc-coated sleeves, set in concrete slab or wall, to a minimum depth of 305 mm 12 inches . Fill sleeve joint with lead, nonshrink grout, or other approved material. Set posts for support of removable fence sections into sleeves that provide a tight sliding joint and hold posts aligned and plumb without use of lead or setting material.

] 3.2.4.3 Bracing

NOTE: Use a s i ngl e di agonal t r uss r od f or f ences l ess t han 3. 7 m 12 f eet hi gh. Use t wo di agonal t r uss r ods on f ences 3. 7 m 12 f eet and hi gher .

Brace gate, corner, end, and pull posts to nearest post with a horizontal brace used as a compression member, placed at least 305 mm 12 inches below top of fence, and [a diagonal tension rod] [two diagonal tension rods].

a. Tolerances

Provide posts that are straight and plumb within a vertical tolerance of

6.35 millimeter 1/4 inch after the fabric has been stretched. Provide fencing and gates that are true to line with no more than 12.7 millimeter 1/2 inch deviation from the established centerline between line posts.

Repair defects as directed.

3.2.5 Concrete Strength

Provide concrete that has attained at least 75 percent of its minimum 28-day compressive strength, but in no case sooner than 7 calendar days

SECTION 32 31 13 Page 18 after placement, before rails, tension wire, or fabric are installed. Do not stretch fabric and wires or hang gates until the concrete has attained its full design strength.

NOTE: Del et e t he f ol l owi ng par agr aph i f t he r ef er enced sect i on i s not i ncl uded.

Take samples and test concrete to determine strength as specified.

3.2.6 Top Rails

Provide top rails that run continuously through post caps or extension arms, bending to radius for curved runs. Provide expansion couplings as recommended by the fencing manufacturer.

[ 3.2.7 Center Rails

Provide single piece center rails between posts set flush with posts on the fabric side, using special offset fittings where necessary.

] 3.2.8 Brace Assembly

Provide bracing assemblies at end and gate posts and at both sides of corner and pull posts, with the horizontal brace located at midheight of the fabric.

Install brace assemblies so posts are plumb when the diagonal rod is under proper tension.

Provide two complete brace assemblies at corner and pull posts where required for stiffness and as indicated.

3.2.9 Tension Wire Installation

Install tension wire by weaving them through the fabric and tying them to each post with not less than 3.9 millimeter 7-gage galvanized wire or by securing the wire to the fabric with 3.5 millimeter 10-gage ties or clips spaced 610 millimeter 24 inches on center.

3.2.10 Fabric Installation

Provide fabric in single lengths between stretch bars with bottom barbs placed approximately 38 millimeter 1-1/2 inches above the ground line.

Pull fabric taut and tied to posts, rails, and tension wire with wire ties and bands.

Install fabric on the security side of fence, unless otherwise directed.

Ensure fabric remains under tension after the pulling force is released.

3.2.11 Stretcher Bar Installation

Thread stretcher bars through or clamped to fabric 102 millimeter 4 inches on center and secured to posts with metal bands spaced 381 millimeter 15 inches on center.

SECTION 32 31 13 Page 19

3.2.12 Gate Installation

Install gates plumb, level, and secure, with full opening without interference. Install ground set items in concrete for anchorage as recommended by the fence manufacturer. Adjust hardware for smooth operation and lubricated where necessary.

3.2.13 Tie Wires

Provide tie wires that are U-shaped to the pipe diameters to which attached. Twist ends of tie wires not less than two full turns and bent so as not to present a hazard.

3.2.14 Fasteners

Install nuts for tension bands and hardware on the side of the fence opposite the fabric side. Peen ends of bolts to prevent removal of nuts.

3.2.15 Zinc-Coating Repair

Clean and repair galvanized surfaces damaged by welding or abrasion, and cut ends of fabric, or other cut sections with specified galvanizing repair material applied in strict conformance with the manufacturer's printed instructions.

3.2.16 Accessories Installation

3.2.16.1 Post Caps

NOTE: Coor di nat e wi t h r equi r ement s f or t op r ai l s or suppor t i ng ar ms.

[Design post caps to accommodate top rail.] Install post caps as recommended by the manufacturer.

3.2.16.2 Padlocks

Provide padlocks for gate openings and provide chains that are securely attached to gate or gate posts. Provide padlocks keyed alike, and provide two keys for each padlock.

[ 3.2.17 Grounding

NOTE: Del et e t hi s par agr aph i f gr oundi ng i s not r equi r ed. I f gr oundi ng i s r equi r ed and l i ght ni ng pr ot ect i on i s not par t of pr oj ect desi gn, t he r equi r ement s i n t he second set of br acket s wi l l be used i n l i eu of t hose i n t he f i r st set of br acket s.

Pr ovi de f ence gr oundi ng det ai l s when composi t e t ype post s ar e speci f i ed wher e gr oundi ng of t he f ence i s r equi r ed.