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.
