“AMEGO” Fence System Specifications

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Ornamental Welded Wire Fences
Section 32 31 17

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Metalco® offers technical assistance to architects, engineers, contractors, owners and facility managers regarding the design and installation of our products. We have provided many custom solutions for unusual situations. Let our experienced engineers assist you to determine the optimum design for your project.

PART 1 - GENERAL

1.1          RELATED DOCUMENTS
                A.    Drawings and general provisions of the Contract, including General and Supplementary Conditions.
1.2          SUMMARY
                A.    This Section includes the following:
                        1.    Fencing System complete with all hardware, posts, rails, gates, and accessories necessary for a complete and aesthetically balanced installation.
                        2.    Swing gates and related hardware.
                        3.    Sliding gates and related hardware.
                        4.    Concrete foundation for posts.
                B.    Related Sections
                        1.    03 30 00 Cast in Place Concrete
                        2.    31 00 00 Earthwork
1.3          REFERENCES
                A.    American Society for Testing and Materials:
                        1.    ASTM A53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
                        2.    ASTM A123 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
                        3.    ASTM B 750-99 Galfan Ingot Preparation for Hot Dip Coating of Carbon Steel Wire
                        3.    ASTM A185 Standard Specification for Steel Welded Wire Reinforcement, Plain, for Concrete
                        4.    ASTM A500 Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes
                        5.    ASTM A501 Standard Specification for Hot-Formed Welded and Seamless Carbon Steel Structural Tubing
                        6.    ASTM A856/A 856/M-98 Standard Specification for Zinc- Aluminum (Galfan) Coated Carbon Steel Wire
                        7.    ASTM B117 Standard Practice for Operating Salt Spray (Fog) Apparatus
                        8.    ASTM B633 Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel
                        9.    ASTM C33 Standard Specification for Concrete Aggregates
                      10.    ASTM C150 Standard Specification for Portland Cement
                      11.    ASTM C207 Standard Specification for Hydrated Lime for Masonry Purposes
                      12.    ASTM D1654 Standard Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments
                      13.    ASTM D2248 Standard Practice for Detergent Resistance of Organic Finishes
                      14.    ASTM D2794 Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation
                      15.    ASTM D3359 Standard Test Methods for Measuring Adhesion by Tape Test
                      16.    ASTM D3363 Standard Test Method for Film Hardness by Pencil Test
                      17.    ASTM D4141 Standard Practice for Conducting Black Box and Solar Concentrating Exposures of Coatings
                      18.    ASTM F2408 Standard Specification for Ornamental Fences Employing Galvanized Steel Tubular Pickets
                  B.    American Concrete Institute:
                        1.    ACI 301 Specifications for Structural Concrete
  1.4          SYSTEM DESCRIPTION
                A.    The Manufacturer shall supply a Fencing System complete with all hardware, posts, rails, unions, gates and
                        accessories necessary for a complete and aesthetically balanced installation.
                B.    Design Requirements:  Fencing system, foundation and installation shall be engineered to withstand [90] mph
                       windload. (Where applicable, wind load rating to be based on IBC 2003 or local code if more stringent.)
1.5          SUBMITTALS
                A.    Product Data:   For each product indicated, include manufacturer’s product literature, shop drawings, and product performance data indicating compliance with this specification.
                B.    Installation Drawings:  Show layout, locations, components, materials, dimensions, sizes, weights, finishes of components, installation and operational clearances, gate 
                        swings, post sizes, spacing and mesh type, gate details/dimensions, details of post anchorage, and post attachment/bracing.

                C.    Samples:  Submit color selections and samples for finishes on fence and accessories if requested by the specifier.             
1.6          QUALITY ASSURANCE
                A.    The contractor shall provide laborers and supervisors who are thoroughly familiar with the type of construction involved and the materials and techniques specified. Review
                         and follow manufacturer’s installation instructions.

                B.    Provide fence system and gates, as a complete unit produced by a single manufacturer, including necessary erection accessories, fittings and fastenings.
                C.    Manufacturer Qualifications:  Company specializing in manufacturing the products specified in this section with a minimum of 10 years documented experience.
                D.    Field Quality Control to be conducted by (Owner’s Project Manager)(General Contractor)(Manufacturers Technical Specialist).
1.7          DELIVERY, HANDLING AND STORAGE
                A.    Deliver fence materials, gates, posts, and accessories to project site, completely pre-finished.  Upon receipt at the job site, all materials shall be checked to ensure that no
                        damages occurred during shipping.  Materials shall be handled and stored properly to protect against damage and theft.

                 B.    Handle fence components to protect finish coating from any scuffs, abrasion or other damage during unloading and installation.  Excessive damage to factory applied coatings
                         will be cause for rejection.

PART 2 - PRODUCTS
2.1          MANUFACTURER
                A.    METALCO Fence & Railing Systems, Inc., Bolingbrook, IL, Tel: 630-971-9680, Fax: 630-971-9860
                        E-mail: info@metalco.us  Web: www.metalco.us
2.2          MATERIAL
                A.    Fencing System:  Subject to the performance and design requirement specified herein, fence and gates shall be manufactured from the following materials:
                        1.    Wire Mesh Panels:  Panels shall be 8'-3" (2500mm) wide x [4’, 5’, 6’ or 8’] (1230mm/1530mm/1730mm/2430mm) high.
                                a.     Panels shall be welded by resistance as per ASTM A185 using 6.5 gauge (.185”) Galfan coated steel wire. 
                                b.    The wire shall have a tensile strength of at least 75,000 lbs / in2, and 2127 lbs break strength. 
                                c.     Applied on wire, 150 g/m2 (.5 oz. / sq ft.) zinc-aluminum coating conforming to ASTM A641, class 1.
                                d.    Horizontal and Vertical wires shall be welded to form 2” x 7.87“(50mm x 200mm) rectangles. 
                                e.    Panels shall have a number of folds according to the table below depending on the respective height of the panel.                        

Panel Height

4’

5’

6’

7'

8’

1230mm

1530mm

1730mm

2130mm

2430mm

Reinforcement Ribs

2

3

3

4

4

 f.     Exterior surface shall have a 2 to 4 mil polyester coating applied after fabrication as described in section 2.3.                
                                g.    The vertical wires of the mesh shall extend 1” from the last or first horizontal wire thereby creating a spiked top or bottom, depending on its position when installed
                        2.    Square or Rectangular Tubular Posts:
                                a.    Steel Posts to be per ASTM F2408 with increased strength to a minimum yield strength of 50,000 psi. 
                                b.    Material greater than 8 ga and larger than 4 inch O.D. shall be formed per ASTM A53, ASTM A500 Grade B, or ASTM A501, with a minimum yield of 46,000 psi and shall
                                       be hot dipped galvanized in accordance with ASTM A123.

                        3.    Fittings and Fasteners:
                                a.    Post caps shall be of press on type steel caps zinc plated to ASTM B633, Service class II or malleable steel caps galvanized to ASTM A123, finished to match fence
                                       finish and color or black UV resistant press
insert caps.
                                b.    Post brackets shall be galvanized steel with stainless, galvanized or zinc plated fasteners.  All brackets shall be finished to match fence finish and color.
                        4.    Swing Gates:  Design of gates shall be as shown on the Drawings.
                                a.    Gate Frames and Infill Panels:  Materials as described above.
                                b.    Frame Members:  Shall be MIG welded.  If necessary, truss rods or cables to be used to prevent gate sag and allow for future adjustment.
                                c.     Gate Posts and Foundation:  Size as determined by Engineer, based on gate size, local wind loading requirements, and installation type.
                                d.    Hinges:  Manufacturer’s standard hinges, structurally capable of supporting gate leaf and allow opening and closing without binding.  Non-lift-off type hinge design shall
                                       permit gate to swing 180⁰ (degrees).  Hinge pins shall be non-removable.

                                e.    Latch:  Capable of retaining gate in closed position and have provision for padlock.
                                f.     Keeper:  Provide keeper for each gate leaf over 5 feet wide.  Gate keeper shall consist of mechanical device for securing free end of gate when in full open position.
                        5.    Slide, Cantilever and Overhead Track Gates  Design of gates shall be as shown on the Drawings.
                                a.    Gate Frames and Infill Panels:  Materials as described above in 2.2.1.1.
                                b.    Frame members:  Shall be MIG welded. If necessary, truss rods or cables to be used to prevent gate sag and allow for future adjustment.
                                c.     Gate Posts:  Size as determined by Engineer, based on gate size, local wind loading requirements, and installation type.
2.3.         POWDER COATED FACTORY FINISH
                A. Coating Material:  Posts, post caps, brackets, and wire mesh panels shall be finished with a factory-applied TGIC polyester powder coating of the “Super-Durable” class.  Powder
                     coated finish shall meet or exceed the following performance criteria.

                B.    Applicable Requirements to Validate the Coating Process:
                        1.    Adhesion Resistance:  ASTM D3359, Measuring Adhesion by Tape Test, Method B.
                                a.    Minimum Performance Requirement:  Coating retention of not less than 95%.
                        2.    Impact Resistance:  ASTM D2794, Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact).
                                a.    Minimum Performance Requirement:  resistance to impact not less than 120 in. /lb.
                        3.    Film Hardness  ASTM D3363, Film Hardness by Pencil Test
                                a.    Minimum Performance Requirement – Minimum Hardness:   2H.
                        4.    Solar Concentration Exposure:  ASTM D4141, Conducting Black Box and Solar Concentrating Exposures of Coatings,  Method C. (Equivalent to EMMAQUA NTW)
                                a.    Minimum Performance Requirement - coating must test to a minimum of 50% Gloss Retention at 1,400 MJ/m2 with no film failure, chalking, cracking or checking and no
                                       more than 10% fading.

                        5.    Thickness:  Provide film thickness of 2-4 mils as measured by manufacturer’s standard powder coat measurement and inspection procedures.
                        6.    Pretreatment:  The fence sheeting and framework shall be prepared using a pre-treatment cleaning system to remove foreign material and to properly prepare the surface to
                               achieve the coating system requirements specified above.

                        7.    Curing:  Heat cure in accordance with powder manufacturer’s prescribed cure schedule to properly crosslink and bond finish to metal substrate.
                        8.    Chemical Resistance:
                                a.    Muriatic Acid Resistance (15 minute spot test)
                                        1)    Procedure:  Apply 10 drops of 10% (by volume) solution of muriatic acid (37% commercial grade hydrochloric acid) in tap water on the coated surface and cover it
                                               with a watch glass, convex side up.  The acid solution and test shall be conducted a 18° to 27°C (65° to 80°F).  After a 15 minute exposure, wash off with running
                                               tap water.

                                                a)    Performance:  No blistering and no visual change in appearance when examined by the unaided eye.
                                b.    Mortar Resistance (24 hour pat test)
                                        1)    Procedure:  Prepare mortar by mixing 75g (2.6 oz) of building lime (conforming to ASTM C207) and 225g (7.9 oz) of dry sand, both passing through a 10-mesh wire
                                                screen with sufficient water, approximately 100g (3.5 oz), to make a soft paste.  Immediately apply wet pats mortar about 1300 mm² (2 in²) in area and 12 mm (1/2
                                                in) in thickness to coated specimens, which have been aged at least 24 hours after coating.  Immediately expose test specimens for 24 hours to 100% relative
                                                humidity at 38°C (100°F).

                                                a)    Performance:  Mortar shall dislodge easily from the coated surface, and any residue shall be removable with a damp cloth.  Any lime residue should be easily
                                                        removed with the 10% muriatic acid solution.  There shall be no loss of film adhesion or visual change in the appearance when examined by the unaided eye.
                                                        Note:  A slight staining or discoloration may be apparent on orange, yellow or metallic coatings.  This should be discussed with the specifying source prior to
                                                        selection of color.

                                c.     Detergent Resistance
                                        1)    Procedure:  Prepare a 3% (by weight) solution of detergent as prescribed in ASTM D2248, and distilled water.  Immerse at least two test specimens in the
                                               detergent solution at 38°C (100°) for 72 hours.  Remove and wipe the specimens dry.  Immediately apply tape (Permacel 99 or equivalent) 20 mm (3/4 in) wide by
                                               pressing down firmly against the coating to eliminate voids  and air pockets.  Place the tape longitudinally along the entire length of the test specimens.  If blisters
                                               are visible, then the blistered area must be taped and rated.  Sharply pull off at a right angle to the plane of the surface being tested, per ASTM D3359.

                                                a)    Performance:   No loss of adhesion of the film to the metal.  No blistering and no significant visual change in the appearance when examined by the unaided
                                                       eye.

                                d.    Corrosion Resistance:
                                        1)    Procedure:  Preparation of Test Specimens- Perform a single scribe the length of the specimen, within one inches of any edge and deep enough to expose the
                                                base metal.  Expose the specimen for 1,000 hours according to ASTM B117-07 using a 5% salt solution and 95°F operational temperature.  After exposure, remove
                                                specimens and wipe dry.  Immediately apply tape (Permacel 99 or equal) over scribed are by pressing down firmly against the coating. Sharply pull the tape off at a
                                                right angle to the surface being tested.

                                                a)    Performance:  The required is a minimum of seven on the scribed edge and minimum blister rating of eight within the test specimen field in accordance with
                                                        tables in ASTM D1654.

2.4          CONCRETE FOOTINGS
                *This section shall be superseded by requirements of anti-ram barrier system if used in conjunction with this installation*
                A.    General:  Comply with ACI 301 for cast-in-place concrete; materials consisting of Portland cement complying with ASTM C150, aggregates complying with ASTM C33, and potable
                        water.

                B.    Concrete Mixes:  Normal-weight concrete air entrained with not less than 3000-psi (20.7- MPa) compressive strength (28 days), 3-inch (75-mm) slump, and 1-inch (25-mm)
                        maximum size aggregate.

                C.    Footings:  Footings shall be minimum 3,000 psi after twenty-eight (28) days concrete.  Footing sizes shall be determined by Engineer.
PART 3 - EXECUTION
3.1          PREPARATION
                A.    Verify areas to receive fencing.
                B.    Coordinate fence installation with work of other sections listed in these specifications.
                C.    Examine conditions under which fencing and gates are to be installed.  Notify Contractor of unsatisfactory conditions.  Do not proceed with work until conditions are satisfactory
                        to the installer.

3.2          INSTALLATION
                A.    Install fence and gates in accordance with manufacturer’s instructions and approved installation drawings.  Install fencing to withstand wind load as specified.
                B.    Handle fence components to protect finish coating from any scuffs, abrasion or other damage during installation.  Excessive damage to factory applied coatings will be cause for
                        rejection.

                C.    Space posts at dimensions indicated in the installation drawings.  Attach fence rails to posts using stainless steel or galvanized steel, panel hanger brackets supplied by
                        manufacturer.  Field welding of panels to posts is unacceptable as it will cause significant damage to the galvanizing and powder coat protective finishes.

                D.    Concrete Footings:  Place concrete around posts and vibrate or tamp for consolidation.  Verify that posts are set plumb, aligned, and at correct height and spacing, and stabilized
                        in position during placement and finishing operations until concrete is sufficiently cured.  Protect portion of posts above ground from  concrete splatter.

                E.    Install gates level, plumb, and secure for full opening without interference.  Attach hardware using tamper-resistant or concealed means.  Install ground-set items in concrete for
                       anchorage.  Adjust gate to operate smoothly, easily, and quietly throughout entire operational range.  Confirm that latches and locks engage accurately and securely without
                       forcing or binding.

                F.    Avoid unnecessary cutting, drilling and welding of pre-finished fence components.  If necessary to cut drill, weld or otherwise modify product due to field conditions, repair
                      factory finish in accordance with item below.

                G.   Touch-up any necessary areas by lightly sanding; clean area thoroughly, apply a zinc-rich cold galvanizing primer followed by a high quality acrylic lacquer paint to match finish.
                       (Touch-up paint available from manufacturer) Note: field applied touch-up cannot match the performance of factory applied finishes and should be limited in use.

3.3          CLEANING
                A.    Fence contractor shall remove packing materials and unused product and level uneven areas due to excavations created by fence installations.
END OF SECTION 32 31 16