A04_Salient_Characteristics_Fence_Materials.docx
DOCX document 16 KB Posted
- Attached to
- GATE-SECURITY FENCE MATERIALS ACQ-STIS Federal contract opportunity
- Solicitation number
- 140P4523Q0068
About this file
This document provides specifications for fence materials for a federal contract opportunity issued by the Department of the Interior National Park Service Northeast Region. The specifications cover material requirements for steel fencing components including corrugated pales, rails, and posts. Acceptable materials are Ameristar Impasse II Trident steel fencing or equivalent that meet ASTM standards for galvanized steel alloy and coating thickness. Fabrication requirements are outlined for pre-cutting and pre-drilling fencing components as well as gate specifications. Performance testing requirements are specified for adhesion, corrosion resistance, impact resistance, and weathering of the galvanized coating. Post spacing and sizes are also provided for 8-foot nominal fencing.
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Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| REVISED_SOR__091523_0002.pdf | ||
| Sol_140P4523Q0068_Amd_0002.pdf | ||
| REVISED_Price_Schedule_091523_0002.pdf | ||
| B09_REVISED_Price__Schedule_0001.pdf | ||
| Sol_140P4523Q0068_Amd_0001.pdf | ||
| A04_REVISED_091323_02-SOR.pdf | ||
| Sol_140P4523Q0068.pdf | ||
| 07-REVISED_PRICE_SCHEDULE_091323.pdf |
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Text version
Salient Characteristics Fence Materials Ameristar Impasse II Trident or equivalent
MATERIAL
Steel material for fence framework (i.e., corrugated pales, rails and posts), when galvanized prior to forming, shall conform to the requirements of ASTM A924/A924M, with a 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.
Material for corrugated pales shall be a nominal 2.75” x .75” x 14 Ga. The cross-sectional shape of the rails shall conform to the manufacturer's Impasse II® rail design a nominal 2” x 2” x 11 Ga. Pre-drilled holes in the Impasse II® rail shall be spaced 6” on center, providing a pale airspace of no greater than 3.25” or Pre-drilled holes in the Impasse II Anti-Scale rail shall be spaced 4.1875” on center, providing a pale airspace of no greater than 1.5” (38mm). Tamperproof fasteners shall be used to fasten each pale to rail at every intersection.
FABRICATION
Pales, rails and posts shall be pre-cut to specified lengths. Rails shall be pre-punched to accept tamperproof security fasteners. Post flange shall be pre-punched to accept rail to post attachment. Rails shall be attached to post flange providing a bracket-less design at each intermediate post.
Completed panels shall be capable of supporting a 400 lb. load (applied at midspan) without permanent deformation. Panels shall be biasable to a 30˚ change in grade.
Swing gates shall be fabricated using 2” sq. x 12ga rail, 2” sq. x 12ga. gate ends, and 2.75” x .75” x 0.075 pales.
Pedestrian swing gates shall be self-closing, having a gate leaf no larger than 48” width. Integrated hinge-closer set (2 qty) shall be ADA compliant that shall include a variable speed and final snap adjustment with compact design (no greater than 5” x 6” footprint). Hinge-closer set (2 qty) shall be tested to a minimum of 500,000 cycles and capable of self-closing gates up to a maximum gate weight of 260 lbs. and maximum weight load capacity of 1,500 lbs. Hinge-closer device shall be externally mounted with tamper-resistant security fasteners, with full range of adjustability, horizontal (.5” - 1.375”) and vertical (0 - .5”). Maintenance free hinge-closer set shall be tested to operate in temperatures of negative 20 F to 200 F degrees, and swings to negative 2 degrees to ensure reliable final lock engagement.
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 |
| 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). |
Post Spacing
| Span |
| 8’ Nominal (95” Rail) |
Line & End Posts
| Post Size |
| 3” x 2.75” x 12 Ga. I-Beam |
| 4” x 2.75” x 11 Ga. I-Beam |
| Post Settings ± ¼” O.C. |
| 96” |
| 96” |
File details come from the government source that posted it. Updated .