Heavy-Duty
Aluminum Access Floor
Architectural Specifications

Section 13270

1.00 GENERAL

A. The Maxcess Heavy-Duty Aluminum Access Floor system shall consist of a combined assembly of removable aluminum panels and/or gratings mounted on adjustable aluminum pedestals installed over a concrete sub-floor to provide space for the accommodation of electrical conduits, mechanical service lines, air supply and/or return plenums, or unobstructed passage for laminar air flow.

B. Finished access floor surface shall be smooth and uniform with all panels and gratings free of distortion. Completed floor system shall be rigid and free of unstable panels.

2.00 PRODUCT

2.01 MAXCESS HEAVY-DUTY ALUMINUM ACCESS FLOOR SYSTEM

A. CONCENTRATED DESIGN LOAD

Solid or perforated panels, when installed and functioning as part of the complete floor system, shall be capable of supporting a concentrated design load of the following magnitude on one square inch (25.4 mm2) anywhere on the top surface, with a maximum deflection of 0.080” (2.0 mm) and a permanent not exceed 0.010” (0.25 mm).

4,000 lb. (1,815 Kg)

B. UNIFORM DESIGN LIVE LOAD
Floor shall be capable of supporting a uniform design live load of the following magnitude, with a maximum deflection of 0.040” (1.0 mm).

800 lb./ft2 (3906 kg/M2)

C. ULTIMATE LOAD SAFETY FACTOR
Ultimate load safety factor of the HD24/60 or the HDP24/60 panel shall not be less than 2 times the design load.

D. ROLLING LOADS
Caster-mounted equipment, within specified load limits, shall be able to roll easily throughout the entire floor area. With regard to CISCA test procedures:

1) Permanent set on solid panels or perforated panels shall not exceed 0.020” (.50mm) local deformation or 0.040” (1.0 mm) overall deformation after 10,000 passes of a 3,500 lb. (1,360 kg) load on an 6” dia. x 1 1/2” wide (150 mm x 38 mm) caster.

2) Permanent set on solid panels or perforated panels shall not exceed 0.010” (.25 mm) local deformation or 0.020” (.50mm) overall deformation after 10 passes of a 5,500 lb. (1,360 kg) load on a 6” dia. x 1-1/2” wide (150 mm x 38 mm) caster.

E. All full-size panels shall be completely interchangeable and easily removed with appropriate lifting tools.

F. Standard pedestals shall conform to panel load-bearing characteristics and have a positive locking device to prevent accidental loss of finished floor height. Each standard pedestal will support an axial load of at least 5,000 lb. (2,268 kg). The standard pedestal base shall be 4.5” (114.3 mm) in diameter. Pedestal, when properly affixed to the concrete sub-floor, shall withstand a minimum overturning moment of 1,000 inch/pounds (113 Nm).

NOTE: Contact your Maxcess sales representative for special heavy-duty pedestals and seismic understructure.

G. Floor system shall be laterally stable in all directions with panels in place. Horizontal framing and/or stringers shall not be required for finished floor heights up to 24” (610 mm) provided access floor is laterally supported by “load-bearing” perimeter walls. For certain seismic zone applications, stringerless construction may require certification by a licensed State engineer.

H. Components shall be in direct contact for continuous electrical grounding of the entire floor systems. Maximum electrical resistance from the top of the panel, less wear surface, to the pedestal base shall be 1 ohm. Spring clips or other mechanical devices shall not be used for grounding.

I. The installed finished access floor height shall be ____ inches (_____mm), measured from the top of the sub-floor.

J. Results of independent laboratory flame spread test shall be in accordance with ASTM E84: Flame spread = 0, smoke density = 25.

2.02 DIE-CAST ALUMINUM PANELS

A. SOLID PANEL
HD24/60 panel shall be 24” x 24” or 600 mm x 600 mm aluminum alloy high pressure die casting conforming to Federal Specifications QQ-A-591-A383. The panel shall have an overall width and length, after finish coating, of 23.995” ± 0.005” (599.9 mm ± 0.13 mm). The overall height at the corners of the panel shall be 1.614 ± 0.010” (41 mm ± 0.25 mm). The panel shall be square to within 0.008” T.I.R. in 24 “ (.19 mm T.I.R. in 600 mm). Underside of panel at each corner shall have an integrally cast female socket to provide for interlocking with a raised male boss on the pedestal head.

B. AIR FLOW
Standard HDP24/60 perforated panel shall conform to all of the specifications set forth for the HD24/60 panel in section 2.02 A. The HDP24/60 panel shall be perforated with 384 rectangular holes to allow for 30.3% open area with a bare or epoxy finish and 24.7% with a tile finish. Holes shall be arranged in a pattern with an unobstructed air flow through the panel. Aluminum dampers may be used in conjunction with the perforated panels to reduce air flow for achieving overall air balancing in the room. All panels shall be supplied with eight 0.140” (3.56 mm) diameter holes on the bottom surface for damper mounting.

C. PVC EDGE TRIM
Panels with edge trim (if specified) shall have a trim groove machined inside the perimeter of all four sides. Vinyl edge trim will be pressure-fit into the machined recess.

D. FLOOR COVERING MATERIAL
Floor covering materials shall be factory applied with compatible high creep-resistant or conductive adhesives. Specify HPL (High Pressure Laminate) tile, conductive vinyl/rubber tile, or carpet (without edge trim).

E. FINISHES

1) Epoxy powder coating in standard colors; minimum average thickness of 2.5 mils.

2) Conductive epoxy powder coating in standard colors; minimum average thickness of 2.5 mils.

3) Nickel-chrome electro-deposited plating; minimum average of 0.000005” (0.000127 mm) chromium over a minimum average of .0006” (0.0152 mm) nickel, without copper or brass strike. Significant surfaces shall have complete coverage with matte metallic appearance.

2.03 UNDERSTRUCTURE

A. PEDESTALS
Standard pedestals are fabricated of aluminum alloy. The 4.5” (114.3 mm) diameter base, locking collar, external threaded adjusting stud, and pedestal head are of die cast aluminum alloy conforming to Federal Specification QQ-A-591-A380.

1) The standard 6” to 17” (152 mm to 432 mm) finished floor height (FFH) pedestal shall have a 7/8”-9 UNC (22.2 mm) threaded adjusting stud to provide leveling in increments of 0.028” (0.71 mm) and an overall height adjustment of 2” (51 mm). The vertical tube shall be 1” (25.4 mm) outside diameter with a 0.058” (1.47 mm) wall thickness.

2) Heavy-duty 18” to 24” (457 mm to 610 mm) FFH pedestals shall have a 1”-8 UNC (25.4 mm) threaded adjusting stud to provide leveling in increments of 0.031” (0.79 mm) and an overall height adjustment of 2” (51 mm). The vertical tube shall be 1-1/8” (28.6 mm) outside diameter with a 0.058” (1.47 mm) wall thickness.

3) Vertical tubes shall conform to Federal Specification QQ-A-200/8. The pedestal head shall provide positive interlocking of panels and pedestals to prevent lateral movement. Pedestal heads shall be equipped with a conductive-vinyl grounding pad to be installed with the aluminum screen facing up.

B ALUMINUM STRINGER
Stringers shall be aluminum channel, capable of supporting a 400 lb. (181 kg) load on 1 square inch (25.4 mm2) at mid-point of nominal 2' span or nominal 600 mm span, with a permanent set not to exceed 0.010” (0.25 mm). Stringers shall be fastened with 1/4-20 (6.4 mm) screws to each pedestal and shall provide positive electrical contact between stringer and pedestal.

2.04 ACCESSORIES

A. SLIDE DAMPERS
Slide dampers shall be fabricated of bare aluminum sheet conforming to Federal Specification QQ-A-250/8 with rack and pinion mechanism. Adjustments shall be made from the top of the panel, from full open (34% open area) to full closed and lockable from the top. Damper kit shall include eight 8-32 x 3/8” (4 mm x 9.5 mm) round head Phillips Type-F self-tapping stainless steel machine screws.

B. Other accessories shall be supplied by the Maxcess authorized dealer.

C. Provide _____ spare panels and _____ pedestal assemblies.

2.05 CLEANING PROTOCOL

Special cleaning and packaging shall be available upon request at additional cost.

3.00 INSTALLATION

A. The General Contractor (GC) shall be responsible for providing a level and dry sub-floor free of irregularities. The concrete sub-floor shall be cured a minimum of 28 days and covered with a sealant compatible with pedestal adhesive before installation of the access floor.

B. The GC shall provide a clean, dry and secure area for storage of access floor components in their original, unopened packaging and with clear access to the site to permit trucks to reach the building.

C. Installation area shall be free and clear of other trades at time of installation.

D. Installation shall be supervised by the manufacturer's authorized dealer or representative.

E. Before moving equipment across the panels, the access floor shall be protected, by others, to prevent possible damage to the top surface of the panels.

F. Access floor shall be accepted by the GC and/or Owner prior to allowing other trades on the floor.

G. Environmental requirements:
Building shall be enclosed and be maintained at normal ambient operating temperature and humidity due to the floor system's significant Coefficient of Thermal Expansion: 0.000012”/deg F./linear inch (0.0000231 mm/deg. C./linear mm).

3.01 WARRANTY

Maxcess Aluminum Floors Inc. warrants that its aluminum flooring products will be free from defective material and workmanship for a period of one (1) year form the date of delivery, provided the Owner does not subject floor to environmental, load or wear factors for which it was not designed. Floor covering materials are covered under separate warranty from the original manufacturer.

NOTE: All components and specifications are subject to change without notice.

Information pertains to HD24/60 solid panels unless otherwise stated.

THIS SPECIFICATION SUPERSEDES ALL PREVIOUS MAXCESS TECHNOLOGIES INC. OR HITACHI ALUMINUM ACCESS FLOOR SPECIFICATIONS.

Available worldwide through local Maxcess or ASP-Maxcess dealers.

© 2008