Access Flooring. CSI 3-Part Specifications.

General Office Specifications

PART 1--GENERAL

1.01 Description of Work

A. Work in this section includes, but is not limited to: access floor panels, floor coverings,

understructure and various electrical, data, communication and structural accessories.

B. Related work specified elsewhere:

1. Concrete: Division 3.

(a) Cast-in place concrete shall be within 1" of specified height and shall not vary more

than 1/4" in 10".

(b) Concrete sealer shall be Euco Floor Coat, CLEARBOND or an approved equal that is

compatible with access floor pedestal adhesive.

(c) Depressed slab, if specified, shall be compatible with access floor.

2. Finishes: Division 9, reference paragraph 2.02B.

(a) Tile: Section 09300.

(b) Carpet: Section 09680.

3. Mechanical: Division 15. Assure compatibility of installation details with access floor.

4. Electrical: Division 16. Electrical contractor shall connect access floor to building ground

as specified in paragraph 3.3 C.

1.02 System Description

A. Access Floor system shall consist of nominal 24" square, modular panels supported by and

secured to appropriate understructure.

B. All components of the access floor system are to be of steel construction except for panel-

cementious core, surfacing materials and sound deadening pads between panel and

supports.

C. Panels shall be easily removable by one person with standard tools and a lifting device shall

be interchangeable except where cut for special conditions.

D. Stringers shall be easily removable without the use of special tools. Fasteners for stringer

attachment shall be accessible from the top surface of the stringer.

E. Complete floor system shall be sturdy, rigid and free of overall rocking, rattles, squeaks and

noises. The finished floor shall be level within plus or minus 0.100" and shall be level within

plus or minus 0.062" in any 10' direction.

F. Quantities, finished floor height (FFH) and location of accessories shall be as specified on the

contract drawings.

G. System shall be electrically conductive for dissipation of static while having enough

electrical resistance to provide protection against electrical shock.

1.03 Quality Assurance

A. Manufacturer shall have a 10 year history of successful projects of similar size and

complexity. All structural access floor components shall be supplied by one manufacturer to

ensure compatibility. Products shall manufactured and identified "Made in the U.S.A.."

B. Contractor shall be approved by the manufacturer, use manufacturer-approved service

personnel and shall have a history of five years of successful projects of similar size and

complexity.

C. Method for testing concentrated, ultimate and rolling loads of access floor panels shall be

in accordance with the CISCA Standard Test Procedure and shall be performed by an

independent testing laboratory regularly engaged in the testing of access floor systems and

components.

D. Method for testing resistance of the access floor system shall be in accordance with NFPA

No. 99, Chapter 3, modified, when maintaining the room at 45% plus or minus 5% relative

humidity.

E. Panels without covering shall have a Class A flame spread rating when tested in accordance

with ASTM E 84-81a.

F. Access floor shall be capable of resisting the horizontal force (Fp) in accordance with current

Uniform Building Code standards for (n) ______ building type:office, computer room,

hospital, school, etc.) in seismic zone ___. (Applies to seismic zones 2,3, and 4 only.

Consult your USG Interiors representative or Technical Services for recommended values).

1.04 Sequencing/Scheduling

A. A pre-job conference to establish schedule, review shop drawings and coordinate trades

must be attended by the general contractor, the mechanical contractor, the electrical

contractor, and all others whose work may be affected by the access floor system.

B. Pedestal locations shall be established from approved shop drawings so that mechanical and

electrical work can be installed without interfering with pedestal installation.

C. Installation of access floor shall be coordinated with other trades to maintain the integrity of

the installed system.

D. Traffic shall not be permitted on any floor area for 24 hours to allow the pedestal adhesive

to set.

1.05 Submittals

A. Manufacturer qualifications.

B. Contractor qualifications.

C. Certification that material and installation are in accordance with the specification.

D. Test reports by an independent testing laboratory certifying that component parts perform as

specified.

E. One each of the flooring are to be submitted for review as specified: floor panel, pedestal

and service outlet.

F. Shop drawings of panel layout shall include railings, steps and ramp locations with details of

assembly components, anchoring methods, perimeter conditions, service boxes, cutouts,

grounding methods and interfaces with other conditions.

1.06 Delivery and Placement

A. Materials shall be delivered in original, unopened packages clearly labeled with the

manufacturers name and item description.

B. Material packages shall be distributed around the areas where they will be used to avoid

overstressing the subfloor and to facilitate installation.

1.07 Project Conditions

A. General contractor shall provide secure storage and a clean subfloor which is free of dust,

construction debris and other trades during the installation of the access floor.

B. Building shall be enclosed and the temperature shall be maintained between 40 and 50

degrees F.

PART 2--PRODUCTS

2.01 Manufacturer

The access floor system shall consist of panels and compatible understructure designed and

manufactured by USG Interiors, Inc . Access Floor Systems, Red Lion, PA.

OFFICE SYSTEMS

2.02 Materials

A. Floor panels:

(1) Panels shall be welded steel components with an enclosed bottom pan formed in a

uniform pattern of square pockets. The unitized panels shall be internally filled with a

lightweight cementitious material to improve sound characteristics and to provide

performance values as specified.

(2) Chipboard or particleboard material is unacceptable.

(3) Panels shall be protected against corrosion internally with a phosphate coating and

externally with a conductive epoxy coating applied in an immersion dip process.

(4) Panel assembly shall include four fasteners for attachment to the panel.

(5) Panels shall be identified with manufacturer's name, model number, load rating and

"Made in U.S.A."

B. Floor covering: Panels shall be supplied bare with carpet tiles to be furnished and field

installed by others.

Note: Contact your USG Interiors representative for recommendations of suitable carpet tile

materials.

C. Pedestals for Seismic Zones 0, 1, 2A, and 2B:

For floor heights from 6" to 24":

(1) Pedestal assemblies shall be all-steel welded construction, corrosion resistant and

capable of supporting a 5,000 lb. load without permanent deformation of any part.

(2) Pedestal head shall be galvanized, die-cut steel welded to a 7/8 UNF threaded tube with

a leveling nut and a gravity-activated metal locking collar. Pedestal head assembly shall

provide vibration-proof leveling in increments of 0.012" and an overall height

adjustment of 2".

(3) Pedestal base shall consist of a galvanized steel tube, identified as "Made in U.S.A.,"

with a minimum wall thickness of 0.060" welded to a 4"-square, 1/8" thick galvanized

steel base plate.

(4) Pedestals shall be secured to subfloor with Bogart 282 or DAP 2000 adhesive or

approved equal.

(5) Pedestal assemblies adhered to unsealed concrete subfloor shall be capable, without

panels in place, of resisting a 1,000 in-lb. overturning moment without failure of

adhesive or any part of the pedestal.

For floor heights under 6" or higher than 24", and Seismic Zones 3 and 4, contact your

USG Interiors representative.

D. Accessories:

(1) Service outlets shall be provided at locations detailed on the contract drawings. Outlets

shall be UL-listed access floor boxes capable of accommodating power, signal and

communications cables. The service outlet shall be a drop-in design having a hinged

LEXAN lid with cable hooks and capable of supporting a 1000-lb. concentrated load.

(2) Provide manufacturer's standard steps, ramps, handrails, facia plate, expansion joints,

perimeter ledge support, cove base and/or access holes with grommets where indicated

on the contract drawings.

(3) Provide manufacturer's standard lifting device compatible with the panel.

E. Maintenance materials: provide the following spare materials: panels, pedestals, service

outlets, and panel lifting devices.

2.03 Office System

A. Structural performance: The Panel/CORNERLOC System shall perform as indicated below.

Panel Rated Rolling Rated Conc. Rated Ultimate Impact

System Type Load (Lbs.) Load (Lbs.) Load (Lbs.) Load (Lbs.)

SF-800 600 800 2300 100

SF-1000 800 1000 3000 125

SF-1250 1000 1250 3200 150

SF-1500 1200 1500 3500 175

Rated system loads shown are recommended by USG Interiors and tested in accordance

with CISCA Testing Standards.

B. Electrical resistance: Panel-to-understructure (metal-to-metal) connections shall provide less

than 10 ohms resistance without grounding clips.