Appendix B - Rigid Grid Access Flooring.pdf

UNCLASSIFIED – FOR OFFICIAL USE ONLY

SECTION 09 69 13

RIGID GRID ACCESS FLOORING

DATA CENTER MECHANICSBURG – APPENDIX B

EFFECTIVE DATE: 22 JULY 2020

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PART 1 GENERAL

1.1 SCOPE

This specification details the requirements for computer rooms with an accessible access floor system with sufficient accessible space between the finished working floor and structural floor to install service conduits, piping, wiring, and media for air plenum.

1.2 REFERENCES

The publications form a part of this specification to the extent referenced. The publications are referred within the text by the basic designation only. The current revision of the reference, including all issued updates, must be followed.

1.3 SUBMITTALS

DISA (Defense Information Systems Agency, Facilities Engineering Denver) approval is required for all submittals. Submit the following in accordance with Section 01 33 00, Submittal Procedures:

SD-02 Shop Drawings

Detailed Installation Drawings

SD-03 Product Data

Access Flooring System

SD-04 Samples

Floor Covering

Suspension System

SD-05 Design Data

Seismic Calculations

SD-06 Test Reports

Floor Panel Testing

SD-07 Certificates

Certificate of Compliance

Qualification of Manufacturer

SD-08 Manufacturer’s Instructions

Manufacturer’s Safety Data Sheets (SDS)

SD-10 Operation and Maintenance (O&M) Data

Operation and Maintenance Manuals.

Warranty.

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SD-11 Closeout Submittals

Record Drawings.

Lifting Devices.

1.3.1 Spare Parts

Provide four spare panels with identical floor covering, pedestals and stringers for each 1,000 square feet of access flooring and total of 10 linear feet of cut-out trim. Provide 1 spare perforated tile for every 10 installed. Store extra stock in same manner and location as project materials.

1.4 QUALITY CONTROL

1.4.1 Qualifications

1.4.1.1 General Contractor

The rigid grid access flooring Subcontractors must meet the following credentials:

• Have a minimum of 5 years of documented experience in the installation and commissioning of similar equipment.

• Provide a listing of product designs and installations that include at least five projects, similar to those proposed for use, in successful service for a minimum period of 5 years. Include approximate size of the controls scope of work (in dollars), project duration, name and address of installation, service organization, and date of installation on list.

• Provide resumes of the rigid grid access flooring Subcontractor’s project team.

1.5 DELIVERY, STORAGE, AND HANDLING

1.5.1 Delivery

Deliver materials to site in undamaged condition, in original containers or packages, complete with accessories and instructions. Label packages with manufacturer's name and brand designations.

Package materials covered by specific references bearing specification number, type and class as applicable.

A Manufacturer’s Safety Data Sheet (SDS) in accordance with 29 CFR 1910.1200 (g) must accompany each chemical delivered. At a minimum, this includes all sealants and adhesives.

1.5.2 Storage and Handling

Carefully handle, store, and protect components to prevent damage before and during installation in accordance with manufacturer's recommendations, and as approved by the Contracting Officer. Replace damaged or defective items. Protect all materials from the weather, humidity and temperature variation;

and dirt, dust, or other contaminants. Store all materials in original protective packaging in a safe, dry, and clean location. Store panels at temperatures between 50 and 90°F, and between 20 and 70% humidity.

Replace defective or damaged materials.

Storage of materials is not available inside DISA’s building.

Ensure onsite storage conditions meet the minimum requirements by the manufacturer to ensure warranty coverage. Provide physical installation to the final location inside the facility.

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1.6 WARRANTY

Provide a five-year, onsite, parts and labor manufacturer warranty, in writing, against defects in material and workmanship for 5 years after substantial project completion at no additional cost to the Government.

The manufacturer agrees to repair or replace components that fail in materials or workmanship. Failures include, but are not limited to, sagging and warping of panels; rusting and manufacturer’s defects of panels or support system. For high pressure laminate provide manufacturer's standard performance guarantees or warranties that extend beyond a one-year period for finish materials. Warranty must include all labor, travel, material, and related expenses to restore system and/or components from failures through the warranty period.

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

Provide new bolted stringer-type modular access flooring system with sufficient space, normally at least 2 feet between the finished working floor and structural floor to install service conduits, piping, wiring, and media for air plenum.

2.1.1 Design Requirements

The access flooring system must include the following design requirements:

a. Structural floor capacities.

b. Lateral stability of floor support system independent of panels.

c. Easily removable floor panels.

d. Self-alignment of floor panels.

e. Finished assembly that is rigid and free of vibration, noises, and rocking panels.

f. Adjustable pedestals, capable of supporting a 5000 pound axial load without permanent deformation, when tested in accordance with CISCA Access Floors for Pedestal Axial Load Test.

g. Design Load:

(1) Solid floor tiles capable of supporting a load of 2500 pounds on 1 square inch, at any point on panel, without a top-surface permanent set ≤ 0.01 inch when tested in accordance with CISCA Access Floors, Concentrated Loads with test panels supported by understructure to be used with installed system instead of steel support blocks.

(2) Perforated floor tiles capable of supporting a static load of 1250 pounds, at any point on panel, without a top-surface permanent set ≤ 0.01 inch when tested in accordance with CISCA Access Floors, Concentrated Loads with test panels supported by understructure to be used with installed system instead of steel support blocks.

h. Rolling Load: Solid panel tested on actual understructure system capable of withstanding the following rolling loads when applied at any location on the panel without failing (≤ 0.04 inch permanent set) when tested in accordance with CICSA Access Floors, Rolling Loads:

(1) 1500 pound rolling load applied through a hard rubber surfaced wheel 6 inch diameter by 2 inch wide for 10,000 passes

(2) 2000 pound rolling load applied through a hard rubber surfaced wheel 3 inch diameter by 1 13/16 inch wide caster for 10 passes.

i. Impact Load: Solid panel tested on actual understructure system capable of withstanding 150 pounds dropped from a height of 36 inches onto a 1 square inch area anywhere on the panel without failure of the system, according to CISCA Access Floors, Drop Impact Load Test.

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j. Ultimate Load: Solid panel must meet manufacturer’s published Ultimate Load rating of at least 5000 pounds when applied through a load indentor on a 1 square inch area at any location on the panel without failure, tested in accordance with CISCA Access Floors, Ultimate Loading.

k. Safety Factor: Solid panel must provide a minimum Safety Factor of 2 times the design load rating on a 1 square inch area anywhere on the panel without failure when tested in accordance with CISCA Access Floors, Ultimate Loading.

l. Panel Drop Test: Panel must be able to be dropped face up onto a concrete slab from a height of 36 inches, after which meeting all load performance requirements.

m. Panel Cutout: A panel with an 8 inch diameter interior cutout must maintain the design load strength with a minimum safety factor of 2 anywhere on the panel when tested on the actual understructure.

n. Flammability: Meet Class A flame spread requirements for flame spread and smoke development when tested in accordance with ASTM E-84.

o. Combustibility: All access floor system components must qualify as non-combustible when tested in accordance with ASTM E-136.

p. Axial Load: Pedestal support assemblies provides a 6000 pound axial load without permanent deformation when tested in accordance with CISCA Access Floors, Pedestal Axial Load Test.

q. Overturning Moment: Pedestal support assemblies provides an average overturning moment of 1000 in-lbs when adhered to a clean, level, uncoated concrete surface and tested in accordance with CISCA Access Floors, Pedestal Overturning Moment Test

r. Stringer Concentrated Load: Strings must withstand a concentrated load of 450 pounds placed in the midspan on a 1 square inch area using a round or square indentor with a permanent set ≤0.010 inch after load is removed and tested in accordance with CISCA Access Floors, Stringer Load Testing.

2.1.2 Performance Requirements

2.1.2.1 Seismic Performance

Units must withstand the effects of a seismic event. Provide all necessary bracing and supports to meet requirements for installation for the site seismic design category in accordance with IBC. Provide seismic calculations sealed by a Professional Engineer to confirm the installation meets the seismic requirement in accordance with IBC.

The term “withstand” means “the unit remains in place without separation of any parts when subject to the seismic forces specified and remain fully operational after the seismic event.”

2.2 COMPONENTS

Submit manufacturer's product data for access flooring system consisting of descriptive data, catalog cuts, and installation instructions. Include in the data information about any design and production techniques, total system including all accessories and finish coatings of under-floor components. Include cleaning and maintenance instructions. Systems which contain zinc electroplated anti-corrosion coatings are prohibited.

2.2.1 Standard Products

Provide materials and equipment which are the standard products of a manufacturer regularly engaged in the manufacture of such products which are of equal material, design and workmanship. Products must meet the following:

a. Satisfactorily used in commercial or industrial facilities for at least 5 years prior to bid opening.

b. Available for purchase in the commercial market through advertisements, manufacturer’s catalogs, or brochures for at least 5 years prior to bid opening.

c. Single manufacturer.

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2.2.2 Floor Panels

2.2.2.1 Floor System Drawings and Planer Quality

Provide the following:

a. Submit Fabrication Drawings for elevated floor systems consisting of fabrication and assembly details to be performed in the factory.

b. Indicate on Location Drawings exact location of pedestals, ventilation openings, cable cutouts, and the panel installation pattern.

c. Provide Detail Drawings showing details of the pedestals, pedestal-floor interlocks, floor panels, panel edging, floor openings, floor opening edging, floor registers, floor grilles, cable cutout treatment, perimeter base, expansion, and peripheral support facilities.

d. Design and workmanship of the floor, as installed, must be completely planar within ± 0.060 inch in 10 feet, 0.100 inch for the entire floor, and 0.030 inch across panel joints.

e. Floor-panel joint-width tolerances must not exceed 0.017 inch as measured with a feeler gauge at any point in any joint when the panels are installed.

2.2.2.2 Detailed Installation Drawings

Submit Detailed Installation Drawings which include the following, as a minimum:

a. Location of panels

b. Layout of supports, panels, and cutout locations

c. Stair, handrail, and ramp framing (if required)

d. Sizes and details of components

e. Details at floor perimeter and height above structural floor

f. Method of anchorage to structural subfloor

g. Lateral bracing

h. Typical cutout details

i. Gasketing, return air grilles, supply air registers, and perforated panels. Include air transfer capacity of grilles, registers and panels

j. Description of factory coating

k. Floor finishes

l. Location of connection to building grounding electrode

2.2.2.3 Panel Configuration

Base access floor system on a 24 by 24 inch square module matching the existing clearance between structural floor and finished working floor. Fabricate so accurate job cutting and fitting may be done using standard sizes for perimeters and around columns.

Do not expose metal on finished top surface of panels. Provide cutouts and cutout closures to accommodate utility systems and equipment intercabling. Reinforce cutouts to meet design load requirements. Provide extra support pedestals at each corner of cutout for cutout panels that do not meet specified design load requirements.

Panel design must provide for convenient panel removal for underfloor servicing and for openings for new equipment. Use panels of uniform dimensions within specified tolerances. Permanently mark underside of panels to indicate manufacturer and model number.

Machine square floor panels to within the following tolerances:

a. Floor Panel Length: ± 0.010 inch.

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b. Floor Panel Edge Straightness: ± 0.0025 inch.

c. Floor Panel Flatness: ± 0.035 inches on diagonal.

d. Floor Panel Squareness: ± 0.030 inch in panel length.

2.2.2.4 Lightweight Concrete Filled Panels (Exposed Concrete)

Provide floor panels in accordance with the following:

a. Lightweight structural concrete fully encased in top sheet steel with either structural reinforcing or a die-formed, hot dipped galvanized steel bottom pan.

b. All ferrous exposed materials must have a factory applied corrosion resistant finish. Zinc electroplating is prohibited

c. Interchangeable

d. Laminate covering in accordance with paragraph 2.2.2.6.1, High Pressure Laminate.

2.2.2.5 Air Supply Panels

Provide the manufacturer's standard registers, grilles, perforated panels, and plenum dividers type where indicated.

Provide perforated air supply floor panels in accordance with the following:

a. Fabricated of 14-gauge perforated steel sheet welded to minimum 16-gauge side channels

b. Laminate covering in accordance with paragraph 2.2.2.6.1, High Pressure Laminate

c. Perforations must meet the following, unless otherwise specified in Contract documents:

(1) 25% open area

(2) Uniform pattern

d. Dampers and flow-controlled perforated floor tiles are not permitted

e. Rated for loads up to 1250 pounds

f. Class A flame spread rating

2.2.2.6 Floor Covering

Provide floor panels with factory applied finish materials firmly bonded in place with waterproof adhesive.

Bolt heads or similar attachments must not rise above the traffic surface. Submit three separate samples of each specified floor covering finish and color.

2.2.2.6.1 High Pressure Laminate (HPL)

Provide factory applied low-sheen matte HPL surfacing in accordance with ANSI/NEMA LD 3, High-Wear type, Grade HDH, 1/8 inch (3 mm) thickness. Finish material must consist of one piece to cover the face of the panel, with an edge detail integral to the finish material. The total system electrical resistance from the wearing surface of the floor must be between 1,000,000 ohms (1.0 x 10⁶) and 2,000,000,000 ohms (2 x 10¹⁰) surface to ground resistance when tested at 500 volts, 50% relative humidity and 72°F.

HPL color must be Gray Starlite. The conductive properties of the Nevamar Standard Grade HPL are acceptable.

Bond strength of floor covering must be sufficient to permit handling of the panels by use of the panel lifting device, and to withstand moving caster loads up to 2000 pounds, without separation of the covering from the panel.

Refurbished panels are not permitted.

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2.2.2.7 Accessories

Use air-sealing brushed grommets where panels are cut. Proposed cuts must be on the edges of the floor panels to support installation with existing cabling. All cuts where existing cabling is permitted to be disconnected must be on the interior of the panel.

2.2.3 Floor Panel Support System

Design support system to allow for 360 degree clearance in laying out cable and cutouts for equipment connections and so that panel and stringer together take up maximum of 2 inches. Submit one sample of the suspension system proposed for use.

Zinc electroplating is prohibited on all components of the floor panel support system.

2.2.3.1 Pedestals

Provide pedestals in accordance with the following:

a. Fabricated of all-welded steel.

(1) Ferrous materials must have a factory-applied corrosion-resistant finish.

b. Base plates:

(1) Minimum of 16 square inches of bearing surface

(2) Minimum of 1/8 inch thickness.

c. Threaded shafts to permit height adjustment within a range of approximately 2 inches, overall floor adjustment within ± 0.10 inch of the required elevation, and to permit leveling of the finished floor surface within 0.062 inch in 10 feet in all directions.

d. Locking devices to positively lock the final pedestal vertical adjustments in place.

e. Pedestal caps must interlock with stringers to preclude tilting or rocking of the panels.

Support panels by adjustable pedestal assemblies which positively locate, engage and secure panels and which accommodate horizontal stringer members. Provide pedestals of steel or aluminum capable of carrying a 5,000 pound axial load without permanent deformation.

Ensure adhesive used to secure pedestals is compatible with existing concrete surface.

2.2.3.2 Stringers

Provide 4 foot long stringers of rolled steel or extruded aluminum, to interlock with the pedestal heads to prevent lateral movement. Provide stringers that can be added or removed after floor is in place. Stringers must support each edge of the floor tile.

2.2.3.3 Gaskets

Provide continuous gasketing at contact surfaces between panel and stringers to deaden sound and seal off the underfloor cavity from above for air tightness, and to maintain panel alignment.

2.2.4 Grounding

Ground the access flooring to the Signal Reference Grid in accordance with Appendix C, Signal Reference Grid for Grounding.

2.2.5 Existing Smoke Detection

The existing smoke detection system shall be removed and reinstalled as required and remain operational during this project.

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2.2.6 Existing Drainage and Leak Detection

The existing drainage and leak detection system shall be removed and reinstalled as required and remain operational during this project.

2.2.7 Existing Clean Agent System

The existing clean agent system (tanks, tank stands, piping and other compounds) shall be removed and reinstalled as required and remain operational during this project.

2.2.8 Existing Other Systems

All other existing systems under the access floor and inside the data center shall be removed and reinstalled as required and remain operational during this project.

2.3 TESTS, INSPECTIONS, AND VERIFICATIONS

2.3.1 Certificate of Compliance

Submit certificate of compliance attesting that the installed access floor system meets specification requirements, including all special equipment loads and specific electrical and or cable requirements for the complete access flooring system including, but not limited to the following:

a. Compliance with ICC-ES AC300 and Compliance with ICC IBC Acceptance Criteria for Access Floors.

b. Load-bearing capabilities of pedestals, floor panels, and pedestal adhesive resisting force.

c. Supporting independent laboratory test reports. For panel, stringer and pedestal load test results include concentrated loads at center of panel, panel edge midpoint, ultimate loads and uniform loads.

d. Floor electrical characteristics.

e. Material requirements.

f. An elevated floor system free of defects in materials, fabrication, finish, and installation that will remain so for a period of not less than 5 years after substantial project completion.

PART 3 EXECUTION

3.1 EXAMINATION

After becoming familiar with all details of the work, verify all dimensions in the field, and advise the Contracting Officer Representative (COR) of any discrepancy before performing the work.

3.2 PREPARATION

3.2.1 Surface Preparation

Ensure the subfloor is level, prep floor and ensure existing concrete slab has been sealed before installing the access floor pedestals. If existing concrete slab is not compatible with the adhesive, install pedestals with fasteners into the existing concrete slab in accordance with the manufacturer’s recommended installation instructions.

3.3 INSTALLATION

Install access flooring at the location and elevation and in the arrangement shown on the approved detailed installation drawings and in accordance with the manufacturer's instructions. Open ends of the floor, where the floor system does not abut wall or other obstruction, must have positive anchorage and

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3.3.1 Preparation for Installation

Clear out all debris in the area in which the floor system is to be installed. Thoroughly clean structural floor surfaces and remove all dust, and maintain this cleanliness. Install floor coatings, required for dust or vapor control, prior to installation of pedestals. If the existing epoxy coating and adhesive are not compatible, apply additional epoxy coating after the pedestals have been installed and the adhesive has cured.

3.3.2 Pedestals

Pedestals must be accurately spaced, and set plumb and in true alignment, in accordance with approved installation drawings. Set base plates in full and firm contact with the structural floor, and secured to the structural floor with adhesive or steel expansion anchors in accordance with manufacturer's instructions. If using expansion anchors to secure, seal the pedestal base and anchors after installation of pedestal.

Allow pedestal adhesive to cure for at least 24 hours before continuing the installation.

Use additional pedestals to support panels where the floor is disrupted by columns, walls, and cutouts.

Floor panels shall be continuously supported along all edges.

3.3.3 Stringers

Interlock stringers with the pedestal caps to preclude lateral movement, spaced uniformly in parallel lines at the indicated elevation. Ensure stringers are installed in a basket weave configuration.

Partially complete floors must be braced against shifting, as required.

3.3.4 Auxiliary Framing

Provide auxiliary framing or pedestals around columns and other permanent obstructions, at sides of ramps, at open ends of the floor, and beneath panels that are substantially cut to accommodate utility systems. Use special framing for additional lateral support as shown on the approved detailed installation drawings. Provide additional pedestals and stringers designed to specific heights and lengths to meet structural irregularities and design loads. Connect auxiliary framing to main framing.

3.3.5 Panels

Interlock panels with supports in a manner that will preclude lateral movement. Fasten perimeter panels, cutout panels, and panels adjoining columns, stairs, and ramps to the supporting components to form a rigid boundary for the interior panels. Level floors within the specified tolerances.

All concrete surfaces, including those resulting from field cuts, must be sealed with the manufacturer's standard sealer before covering the surfaces with other materials.

All uncut panels must be interchangeable. Finished floor must be level, within 0.062 inches in 10 feet or

0.125 inches overall.

3.3.6 Repair of Damaged Components

Any component of the access flooring system which cannot be repaired must be replaced at Contractor expense.

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3.4 CLEANING AND PROTECTION

3.4.1 Cleaning

Thoroughly clean subfloor, access floor, and adjacent surfaces soiled as a result of the work. Incorporate housekeeping for field work which leaves the access floor and subfloor in the affected area free of generated dust and debris; and all floor surfaces vacuum-swept clean throughout the installation process.

Maintain this clean condition for all access flooring installed and associated subfloor until close out documentation is received and accepted, the project is completed, and the building has been documented as beneficially occupied.

When cleaning the access floor, do not permit seepage of cleaner between individual panels. Cleaning of ferrous surfaces must be in accordance with FS TT-C-490.

The building’s existing central vacuum systems is not available for the contractor’s use.

The access flooring must be cleaned before any traffic or other work on the completed floor is started.

3.4.2 Protection

Protect traffic areas of raised floor systems with a covering of building paper, fiberboard, or other suitable material to prevent damage to the surface. Cover cutouts with material of sufficient strength to support the loads to be encountered. Place plywood or similar material on the floor to serve as runways for installation of heavy equipment not in excess of design load capacity. Maintain protection until the raised floor system is accepted.

Any damaged floor panel must be replaced at Contractor expense.

3.4.3 Surplus Material Removal

Remove all Surplus materials into approved storage locations in accordance with paragraph 1.5, DELIVERY, STORAGE, AND HANDLING. Remove all rubbish from the work site.

3.5 CLOSEOUT ACTIVITIES

3.5.1 Operation and Maintenance Manuals

Provide the operating and maintenance manuals, including instructions for proper care of the floor surface.

3.5.2 Record Drawings

Upon completion, and before final acceptance of the work, submit a complete set record drawings.

Provide record working drawings in accordance with DISA’s CAD standards in .pdf and AutoCAD electronic format.

3.5.3 Lifting Devices

Provide a minimum of four (4) of each of the following at project turn-over:

a. Suction cup lifter with extended handle

b. Suction cup lifter

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1.6 WARRANTY

2.2.2.7 Accessories