PWS_Physical_and_performace_characteristics.docx

ACCESS FLOORING Requirements

SYSTEM DESCRIPTION

Background:

The government intends to self-install a new classroom flooring system and requires the products noted on this solicitation.

Characteristics for this system are noted as follows:

A. Access Flooring System: Assemblies composed of modular floor panels on pedestals with or without stringers.

PERFORMANCE REQUIREMENTS

A. Structural Performance: Provide access flooring systems capable of withstanding the following loads and stresses within limits and under conditions indicated, as determined by testing manufacturer's current standard products according to referenced procedures in CISCA A/F, "Recommended Test Procedures for Access Floors":

1. Concentrated Loads: Provide floor panels, including those with cutouts, capable of withstanding a concentrated design load of 1000 lbf, with a top-surface deflection under load and a permanent set not to exceed, respectively, 0.10 and

0.010 inch according to CISCA A/F, Section I, "Concentrated Loads."

8-80 Access Floor System 096900 - 2

2. Ultimate Loads: Provide access flooring systems capable of withstanding a minimum ultimate concentrated load of 2000 lbf, without failing, according to CISCA A/F, Section II, "Ultimate Loading."

3. Rolling Loads: Provide access flooring systems capable of withstanding rolling loads of the following magnitude, with a combination of local and overall deformation not to exceed 0.040 inch (1.02 mm) after exposure to rolling load over CISCA A/F Path A or B, whichever path produces the greatest top-surface deformation, according to CISCA A/F, Section III, "Rolling Loads."

a. CISCA A/F Wheel 1 Rolling Load: 800 lbf.

b. CISCA A/F Wheel 2 Rolling Load: 600 lbf.

4. Stringer Load Testing: Provide stringers, without panels in place, capable of withstanding a concentrated load of 450 lbf (2002 N) at center of span with a permanent set not to exceed 0.010 inch (0.25 mm), as determined per CISCA A/F, Section IV, "Stringer Load Testing."

5. Pedestal Axial Load Test: Provide pedestal assemblies, without panels or other supports in place, capable of withstanding a 6000 lbf axial load per pedestal, according to CISCA A/F, Section V, "Pedestal Axial Load Test."

6. Pedestal Overturning Moment Test: Provide pedestal assemblies, without panels or other supports in place, capable of withstanding an overturning moment per pedestal of 1000 lbf x inches, according to CISCA A/F, Section VI, "Pedestal Overturning Moment Test."

B. Floor Panel Impact-Load Performance: Provide access flooring system capable of withstanding an impact load of 150 lb when dropped from 36 inches onto a 1-sq. in.

area located anywhere on panel, without failing. Failure is defined as collapse of access flooring system.

A. Product Data

1. Carpet: Size equal to full-size floor panel.

2. Carpet Trim: Size equal to length of one panel edge.

3. Resilient Accessories: Manufacturer's standard accessories but not less than 12 inches (300 mm) in length.

4. Exposed Metal Accessories: 12 inches (300 mm) in length.

5. One complete full-size floor panel, pedestal, and understructure unit for each type of access flooring system required.

8-80 Access Floor System 096900 - 3 D. Product Certificates: For each type of access flooring system, signed by product manufacturer.

E. Provide floor panels that are clearly and permanently marked on their underside with panel type and concentrated-load rating.

PART 2 - PRODUCTS

2.1 FLOOR PANELS AND UNDERSTRUCTURE

A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

B. Manufacturers: Subject to compliance with requirements, provide products by SMARTdesks, FFIT or brand name or equal such as:

a. ASM Modular Floors Inc.

b. Tate Access Floors, Inc.

C. Floor Panels, General: Provide modular panels complying with the following requirements that one person, using a portable lifting device, can interchange with other field panels without disturbing adjacent panels or understructure:

1. Nominal Panel Size: 24 by 24 inches

2. Fabrication Tolerances: Fabricate panels to the following tolerances with squareness tolerances expressed as the difference between diagonal measurements from corner to corner:

a. Size and Squareness: Plus or minus 0.015 inch of required size, with a squareness tolerance of plus or minus 0.015 inch, unless tolerances are otherwise indicated for a specific panel type.

b. Flatness: Plus or minus 0.020 inch (0.50 mm), measured on a diagonal on top of panel.

D. Formed-Steel Panels: Fabricated with die-cut flat top sheet and die-formed and stiffened steel bottom pan formed from cold-rolled steel sheet and joined together by resistance welding, with metal surfaces protected against corrosion by manufacturer's standard factory-applied finish to produce units of the following type:

1. Solid Panels: Flat, solid top surface.