36C25219B0038-0003008.pdf

Construct New Parking Garage Bid Document Captain James A. Lovell (Amendment A00002) Federal Health Care Center Project No. 556-305

Revised April 17, 2019

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SECTION 32 31 19

ORNAMENTAL METAL FENCE

PART 1 - GENERAL

1.1 WORK INCLUDED

The contractor shall provide all labor, materials and appurtenances necessary for installation of the industrial ornamental steel fence system defined herein at North Chicago VAMC.

1.2 RELATED WORK

Section 31 20 00 - Earthwork

Section 32 05 23 – Cement and Concrete for Exterior Improvements

1.3 SYSTEM DESCRIPTION

The manufacturer shall supply a total industrial ornamental steel fence system. They system shall include all components (i.e., pickets, rails, posts, gates and hardware) required.

1.4 QUALITY ASSURANCE

The contractor shall provide laborers and supervisors who are thoroughly familiar with the type of construction involved and materials and techniques specified.

1.5 REFERENCES

A. ASTM A653/A653M - Standard Specification for Steel Sheet, Zinc-Coated

(Galvanized) or Zinc-Iron Alloy Coated (Galvannealed) by the Hot-Dip

Process.

B. ASTM B117 - Practice for Operating Salt-Spray (Fog) Apparatus.

C. ASTM D523 - Test Method for Specular Gloss.

D. ASTM D714 - Test Method for Evaluating Degree of Blistering in Paint.

E. ASTM D822 - Practice for Conducting Tests on Paint and Related Coatings and Materials using Filtered Open-Flame Carbon-Arc Light and Water

Exposure Apparatus.

F. ASTM D1654 - Test Method for Evaluation of Painted or Coated Specimens

Subjected to Corrosive Environments.

G. ASTM D2244 - Test Method for Calculation of Color Differences from

Instrumentally Measured Color Coordinates.

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H. ASTM D2794 - Test Method for Resistance of Organic Coatings to the

Effects of Rapid Deformation (Impact).

I. ASTM D3359 - Test Method for Measuring Adhesion by Tape Test.

J. ASTM F2408 – Ornamental Fences Employing Galvanized Steel Tubular

Pickets.

1.6 SUBMITTAL

The manufacturer's submittal package shall be provided prior to installation.

1.7 PRODUCT HANDLING AND STORAGE

Upon receipt at the job site, all materials shall be checked to ensure that no damages occurred during shipping or handling. Materials shall be stored in such a manner to ensure proper ventilation and drainage, and to protect against damage, weather, vandalism and theft.

1.8 PRODUCT WARRANTY

A. All structural fence components (i.e. rails, pickets, and posts) shall be warranted within specified limitations, by the manufacturer for a period of 10 years from date of original purchase. Warranty shall cover any defects in material finish, including cracking, peeling, chipping, blistering or corroding.

PART 2 - MATERIALS

2.1 MATERIAL

A. Steel material for fence framework (i.e. tubular pickets, rails and posts), shall be galvanized prior to forming in accordance with the requirements of ASTM A653/A653M, with minimum yield strength of 45,000 psi (310 MPa). The steel shall be hot-dip galvanized to meet the requirements of ASTM A653/A653M with a minimum zinc coating weight of

0.90 oz/ft2 (276 g/m2), Coating Designation G-90.

B. Material for pickets shall be 1” square x 14 Ga. tubing. The cross-sectional shape of the rails shall conform to the manufacturer’s

ForeRunner™ double wall design with outside cross-section dimensions of

1.75” square and a minimum thickness of 14 Ga. Picket holes in the

ForeRunner rail shall be spaced 4.715” o.c., except for Invincible style

6’ long, which shall be, spaced 4.98” o.c. Picket retaining rods shall

Federal Health Care Center Project No. 556-305

Revised April 17, 2019

32 31 19 - 3 be 0.125” diameter galvanized steel. High quality PVC grommets shall be supplied to seal all picket-to-rail intersections. Fence posts and gateposts shall meet the minimum size requirements of Table 1.

2.2 FABRICATION

A. Pickets, rails and posts shall be precut to specified lengths. Rails shall be prepunched to accept pickets. Pickets shall be predrilled to accept retaining rods.

B. Grommets shall be inserted into the prepunched holes in the rails and pickets shall be inserted through the grommets so that predrilled picket holes align with the internal upper raceway of the ForeRunner rails

(Note: This can best be accomplished by making an alignment jig).

Retaining rods shall be inserted into each ForeRunner rail so that they pass through the predrilled holes in each picket.

C. The base coat shall be a thermosetting epoxy powder coating (gray in color) with a minimum thickness of 2 mils (0.0508mm). The topcoat shall be a “no-mar” TGIC polyester powder coat finish with a minimum thickness of 2 mils (0.0508mm). The color shall be (specify Black, Bronze, White, or Desert Sand). The stratification-coated framework shall be capable of meeting the performance requirements for each quality characteristic shown in Table 2.

D. Completed sections (i.e., panels) shall be capable of supporting a 600 lb.

load applied at midspan without permanent deformation. Panels shall be biasable to a 25% change in grade.

PART 3 - EXECUTION

3.1 PREPARATION

All new installation shall be laid out by the contractor in accordance with the construction plans.

3.2 FENCE INSTALLATION

Fence post shall be spaced according to Table 3, plus or minus ½”. For installations that must be raked to follow sloping grades, the post spacing dimension must be measured along the grade. Fence panels shall be attached to posts with brackets supplied by the manufacturer. Posts shall be set in concrete footers having a minimum depth of 36” (Note: In some cases, local

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Revised April 17, 2019

32 31 19 - 4 restrictions of freezing weather conditions may require a greater depth). The

“Earthwork” and “Concrete” sections of this specification shall govern material requirements for the concrete footer. Posts setting by other methods such as plated posts or grouted core-drilled footers are permissible only if shown by engineering analysis to be sufficient in strength for the intended application.

3.3 FENCE INSTALLATION MAINTENANCE

When cutting/drilling rails or posts adhere to the following steps to seal the exposed steel surfaces; 1) Remove all metal shavings from cut area. 2)

Apply zinc-rich primer to thoroughly cover cut edge and/or drilled hole; let dry. 3) Apply 2 coats of custom finish paint matching fence color. Failure to seal exposed surfaces per steps 1-3 above will negate warranty. It is recommended that paint pens be used to prevent overspray.

3.4 CLEANING

The contractor shall clean the jobsite of excess materials; post-hole excavations shall be scattered uniformly away from posts.

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Table 1 – Minimum Sizes for Posts

Fence Posts Panel Height

2-1/2” x 12

Ga.

Up to & Including 6’ Height

3” x 12 Ga. Over 6’ Up to & Including 10’ Height

4” x 11 Ga. Over 10’ Height

Gate Height

Gate Leaf Up to &

Including 6’

Over 6’ Up to &

Including 8’

Over 8’ Up to &

Including 10’

Over 12’

Up to 4’ 3” x 12Ga. 3” x 12 Ga. 4” x 11 Ga. 4” x 11 Ga.

4’1” to 6’ 3” x 12Ga. 3” x 12 Ga. 4” x 11 Ga. 4” x 11 Ga.

6’1” to 8’ 4” x 11 Ga. 6” x 3/16” 6” x 3/16” 6” x 3/16”

8’1” to 10’ 4” x 11 Ga. 6” x 3/16” 6” x 3/16” 6” x 3/16”

10’1” to 12’ 6” x 3/16” 6” x 3/16” 6” x 3/16” 8” x 1/4"

12’1” to 16’ 6” x 3/16” 6” x 3/16” 8” x 1/4” 8” x 1/4"

Table 2 – Coating Performance Requirements

Quality

Characteristics

ASTM Test Method Performance Requirements

Adhesion D3359 – Method B Adhesion (Retention of Coating) over 90% of test area (Tape and knife test).

Corrosion

Resistance

B117, D714 & D1654 Corrosion Resistance over 3,500 hours (Scribed per D1654; failure mode is accumulation of 1/8” coating loss from scribe or medium #8 blisters).

Impact

Resistance

D2794 Impact Resistance over 60 inch lb.

(Forward impact using 0.625” ball).

Weathering

Resistance

D822 D2244, D523

(60˚ Method)

Weathering Resistance over 1,000 hours (Failure mode is 60% loss of gloss or color variance of more than 3 delta-E color units).

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