CONSTRUCTION STANDARD SPECIFICATION

SECTION 10270

[ACCESS FLOORING]{.underline}

Page

PART 1 - GENERAL

1.01 Summary [2](#summary)

1.02 References [2](#references)

1.03 Definitions [2](#definitions)

1.04 System Description [2](#system-description)

1.05 Submittals [3](#submittals)

1.06 Quality Assurance [4](#quality-assurance)

1.07 Delivery, Storage, And Handling [4](#delivery-storage-and-handling)

1.08 Project Conditions [4](#project-conditions)

PART 2 - PRODUCTS

2.01 Manufacturers [4](#manufacturers)

2.02 System Components [4](#system-components)

PART 3 - EXECUTION

3.01 Examination [7](#examination)

3.02 Installation [7](#installation)

3.03 Cleaning [8](#cleaning)

3.04 Protection [8](#protection)

CONSTRUCTION STANDARD SPECIFICATION

SECTION 10270

[ACCESS FLOORING]{.underline}

# PART 1 - GENERAL

## 1.01 SUMMARY

This section includes access flooring and related accessories.

## 1.02 REFERENCES

A. American Society of Testing and Materials (ASTM)

E84 Test Method for Surface Burning Characteristics of Building
Materials

B. International Building Code (IBC) Chapter 10 (means of Egress)
Section 1004 Occupant Level

Section 1009 Stairways and handrails

Section 1012 Guardrails

C. National Electrical Manufacturers Association (NEMA)

LD3 Static Generation Test

D. Uniform Federal Accessibility Standards (UFAS)

Section 4.8 Ramps

## 1.03 DEFINITIONS

\"Universal Head\" - A pedestal head capable of receiving a bolted down
and/or snap on stringer system.

## 1.04 SYSTEM DESCRIPTION

Design Requirements: The floor system shall consist of nominal 24 inch x
24 inch (61 cm x 61 cm) interchangeable, gravity held floor panels
supported on all sides by a combination snap-on/bolted rigid grid system
of stringers supported by a \"universal\" head and an adjustable
pedestal assembly. The system shall be complete, including ramps, steps,
handrails, fascia, and trimmed floor cut-outs.

## 1.05 SUBMITTALS

A. General: Submit the following items in accordance with the Conditions
of Contract and Section 01330, "Submittal Procedures.\"

B. Product Data: Submit product data for the following items. Include
laboratory test reports and other data to show compliance with
specifications.

1\. Complete access floor system.

2\. Access floor system accessories.

3\. Pedestal base adhesive.

C. Shop Drawings: Submit shop drawings showing complete access floor
system, including floor panel layout and cut-out locations. Include
details for handrails, guardrails, ramps, steps, fascia, cable cut-outs,
and receptacles to be installed to bottom or top of raised access floor
system.

D. Samples: Submit manufacturer\'s standard color charts for available
finishes.

E. Material Safety Data Sheets (MSDS): Submit MSDS for floor panels,
pedestal adhesive, pedestals, stringers, and floor finish.

F. Quality Control: Submit manufacturer\'s installation instructions for
the following items:

1\. Access floor system.

2\. Access floor system accessories.

3\. Pedestal adhesive.

G. Asbestos Free Certification: Submit manufacturer\'s written
certification that all access flooring materials and accessories to be
installed on this project are free of asbestos.

> H. Installer\'s Certification: Submit installer\'s certification from
> manufacturer showing compliance with 1.06B.
>
> I. Electrical Properties: If floor is designated to be conductive,
> submit manufacturer\'s electrical properties data.
>
> J. LEED Submittals:
>
> 1\. Credit EQ 4.1: Manufacturers' product data for pedestal
> installation adhesive, including printed statement of VOC content.
>
> 2\. Credit EQ 4.3: Manufacturers' product data for carpet and
> installation adhesive including printed statement of VOC content
>
> 3\. Credit EQ 4.4: Particleboard manufacturers' product data for
> particleboard used in steel-covered, wood core panels indicating that
> particleboard contains no urea formaldehyde.

## 1.06 QUALITY ASSURANCE

A. Manufacturer Qualifications: The manufacturer of the floor system
shall be a reputable company with a minimum of ten (10) years experience
in the manufacturing of raised floor systems.

B. Installer Qualifications: The installation of the access floor system
and accessories shall be by the manufacturer\'s certified, trained
craftsmen.

## 1.07 DELIVERY, STORAGE, AND HANDLING

A. Packing and Shipping: Access floor system and accessories shall be
packed and shipped to the job site in unopened boxes, clearly labeled
with the manufacturer\'s name and item description.

B. Storage and Protection: Store access flooring in a manner which
prevents overloading of the building structure and prevents damage to
system components.

## 1.08 PROJECT CONDITIONS

A. Environmental Requirements: Do not proceed with installation of
access flooring until installation area is enclosed and has an ambient
temperature of between 50 and 90 degrees Fahrenheit (10 and 32 degrees
Centigrade) and a relative humidity of not more than 60 percent.

B. Field Measurements: Prior to shop drawing preparation, check actual
location of walls and other construction to which access flooring must
abut. Show recorded dimensions on shop drawings.

# PART 2 - PRODUCTS

## 2.01 MANUFACTURERS

Manufacturers with capability to meet this specification include, but
are not limited to:

Tate Access Floors

Mult-A-Frame Corporation

Maxcess Technologies, Inc.

## 2.02 SYSTEM COMPONENTS

A. System Performance: The floor system shall provide an ultimate
loading capacity of 4000 pounds (1814 kg) on one square inch (6.45 cm2)
without failure. The system shall withstand without failure an impact
load anywhere on the installed floor system of 150 pounds (68 kg)
dropped from a height of 36 inches (91 cm) onto one square inch (6.45
cm2). Floor system should also resist a uniform dead load of 100 psf
(148.82kg/m2) for partitions supported by floor in addition to all other
loads.

B. Floor Panels: Floor panels shall be 24\" x 24\" (61 cm x 61 cm)
modular, gravity held panels and shall consist of a steel top sheet
welded to a formed steel bottom pan and painted inside and outside with
an epoxy paint. The overall dimension of the panel shall be controlled
to a tolerance of plus or minus 0.003 inch (0.076 mm).

1\. Panel Performance: Floor panels shall meet or exceed the following
performance criteria:

a\. Panels shall be capable of supporting a concentrated load of 1250
pounds (567 kg) placed on a one square inch (6.45 cm2) area at any
location on the panel with a maximum top or bottom surface deflection of
1/300th of span. Permanent set under these loading conditions shall not
exceed .010 inches (2 mm).

b\. Panels shall have a class \"A\" flame spread rating when tested in
accordance with ASTM E84, shall be fabricated of non-combustible
materials, and have the following ratings:

\(1\) Flame spread: Maximum 25 per ASTM E84.

\(2\) Smoke Developed: Maximum 50 per ASTM E84.

2\. Standard Grade Panel Finish: Unless otherwise specified, floor
panels shall have a 0.123 inch (3.12 mm) minimum high pressure laminate
finish factory bonded to the panel and specially designed with high
durability for use in access floors. Laminate shall be Nevamar grade
FL-12 or approved equal with the following characteristics:

a\. Finish shall meet or exceed requirements of NEMA LD3.

b\. Color shall be MR-6-5, \"Winter Grey,\" unless otherwise noted on
drawings or otherwise chosen at time of submittals from manufacturer\'s
standard colors.

c\. Edge trim shall be rigid vinyl, mechanically attached and bonded to
the panel surface flush with the panel finish.

3\. Conductive Grade Panel Finish: When raised access floor is
designated to be conductive, finish shall be manufacturer\'s conductive
grade laminate without carbon on the surface. Laminate shall be factory
adhered with conductive adhesive.

a\. Electrical properties shall meet or exceed the requirements of NEMA
LD3 and shall be reviewed by SNL at time of submittals for the proposed
application.

C. Understructure: The understructure system shall consist of all metal
pedestal base, \"universal\" head assemblies and stringers with
corrosive resistant finishes. The understructure shall be able to
achieve a finished floor height of between 6 to 24 inches (15.25 to 61
cm).

1\. Pedestal Assembly: Pedestal assemblies shall support a 5000 pound
(2268 kg) axial load without permanent deformation and shall provide a
means of leveling and locking the assembly at a selected height.

2\. Pedestal Bases: Pedestal bases shall be fabricated with not less
that 16 square inches (103.23 cm2) of bearing area and assembled to a
threaded stud which is capable of receiving a \"universal\" pedestal
head assembly. Pedestal bases, when adhered to floor, shall be capable
of resisting 800 inch-pounds (49.2 Newton-meters) of overturning moment.

3\. Pedestal Heads: Pedestal heads shall be \"universal heads\", capable
of receiving combination bolted/snapped-on stringers. Heads shall be one
piece, galvanized steel construction with steel tubes with I.D. to match
O.D. of pedestal stud.

4\. Stringers: The stringers shall be a combination bolted/snap-on type
and shall be of length to install in a 24 inches x 24 inches (61cm x 61
cm) ) grid pattern and shall be constructed of all steel members capable
of supporting a 200 pound (90.7 kg) load on one square inch (6.45 cm2)
at the center of a 24-inch (61 cm) span with a permanent set of not more
than 0.010 inch (.254 mm). Stringers shall have sound deadening gaskets
heat cured and permanently bonded to the stringer at the factory.
Stringer fasteners, where specified, shall be a minimum #10-24 x 1 3/4
flat head machine screws.

D. Accessories: Provide the following manufacturer\'s accessories as
specified or as noted on contract drawings:

1\. Perforated Access Floor Panels: Provide 24 inch x 24 inch (61 cm x
61 cm) perforated access panels capable of supporting the same loads as
the regular floor panels. Panels shall have either a fixed or adjustable
slide damper as specified on the contract documents. Finish on
perforated floor panels shall match that of regular floor panels.

2\. Ramp Assemblies:

a\. Ramp understructure shall be of standard access floor panels filled
with a lightweight cementitious product and finished with a non-slip
bonded rubber covering and shall be in compliance with the UFAS.

b\. Ramp understructure shall be of a bolted stringer system attached to
swivel pedestal head assemblies.

3\. Step Assemblies: Step assemblies shall be manufacturer\'s standard
and shall be in compliance with UBC.

4\. Fascia Assemblies: Fascia assemblies shall be 1/16 inch (1.5875 mm)
thick aluminum.

5\. Handrails/Guardrails: Handrails and guardrails shall be fabricated
of polished aluminum pipe rail in accordance with requirements of the
UBC Sections 3306 and 1712, respectively.

a\. Top rail of handrail/guardrail shall be capable of withstanding the
following loads.

\(1\) Concentrated load of 300 pounds (136.08 kg) applied at any point
nonconcurrently, vertically downward or horizontally.

> \(2\) Uniform load of 100 pounds (45.36 kg) per linear foot vertically
> downward or horizontally.

6\. Pedestal Adhesive: Pedestal adhesive shall be as recommended by
manufacturer and shall be compatible with floor finishes.

7\. Suction Lifting Device: Provide one manufacturer\'s standard
suction-lifting device for every 1000 square feet (92.9 m2) of access
floor (minimum one per each separate access floor area) but not less
than two.

8\. Extra Panels: Provide 5% of extra panels for storage at job site.

9\. Seismic Braces: Provide one manufacturer\'s standard seismic brace
for every 144 square feet (13.38 m2) of floor area for floors over 21
inches (53.34 cm) high, and pedestals below ramps.

# PART 3 - EXECUTION

## 3.01 EXAMINATION

Verification of Existing Conditions: Examine subfloor for unevenness,
irregularities and dampness that could affect the quality and execution
of the work. If floor sealing is required elsewhere in contract
documents, verify that sealer has been installed and allowed to properly
dry prior to commencing work. Do not proceed with installation until
subfloor surfaces are clean, dry and clear of other trades and ready to
receive access flooring.

## 3.02 INSTALLATION

A. General: Install the complete access floor system according to
manufacturers\' recommended installation instructions using a 24 inch x
24 inch (61 cm x 61cm) pattern of stringers and install system grounding
if shown on contract documents.

B. Stringers: Stringers shall be snapped and bolted on except over
designated raceway areas indicated on drawings, where they shall be
snap-on installed only.

C. Tolerances: The access floor system shall be level within plus or
minus 0.060 inches (1.524 mm) in 10 feet (3.05 m) and plus or minus 0.10
inch (.254 mm) over the entire floor. The complete floor system shall be
sturdy, rigid, and free of squeaks.

D. Cutouts: Floor cutouts shall be made in panels where shown on
contract drawings, shop drawings, and as required to install mechanical,
electrical and communication items associated with project.

1\. Small holes 5 inches (12.7 cm) in diameter and smaller shall be cut
to accept manufacturer\'s standard grommeted trim.

2\. Larger cutouts shall be sized as required to accept the pipes,
cables, conduits, etc. specified on the contract documents.

E. Cutout Trim: Trim cutouts with manufacturer\'s standard grommeted
trim for cutouts 5 inches (12.7 cm) in diameter and smaller and with
manufacturer\'s standard extruded vinyl edge trim for larger cutouts.

F. Accessories: Install manufacturer\'s accessories in accordance with
approved shop drawing details. Panels for ramps shall be bolted in place
at all corners.

1\. Handrail/guardrail installed system shall be capable of withstanding
the following loads:

a\. Concentrated load of 200 pounds (90.72 kg) applied at any point
nonconcurrently, vertically down or horizontally.

b\. Uniform load of 50 pounds (22.68 kg) vertically or horizontally
applied.

G. Air Seals: Install manufacturer\'s standard air seals in areas where
underfloor space is used as an air plenum.

## 3.03 CLEANING

> A. Vacuuming: Vacuum under and above newly installed access floor,
> removing all debris and dirt.

B. Scuff Mark Removal: At project completion and prior to occupancy,
remove all scuff marks from newly installed access flooring using floor
manufacturer\'s approved cleaning solutions.

## 3.04 PROTECTION

Temporary Floor Covering: Cover and protect newly installed access floor
with taped down cardboard and/or plastic until project completion.
Damaged access flooring shall be replaced at no cost to Sandia National
Laboratories.

END OF SECTION