File: Grid Spec Without Filters Rev. #1; 04/19/96
SECTION 13038
UG-1 CLEANROOM CEILING GRID
· Grid
· Blanks
· Lights
PART 1 - GENERAL
1.1 SUMMARY
A. Section includes design, materials, hardware, installation, supervision and testing, complete in all aspects necessary for installation of a laminar flow ceiling grid.
1.2 QUALITY ASSURANCE
A. Performance: The resultant ceiling grid shall be capable of providing cleanroom class conditions indicated for the specific area installed, support all live loads, dead loads, and hanging loads as indicated.
1.3 SUBMITTALS
A. Product data: Submit manufacturer's published specifications, recommendations and installation instructions for intended use.
B. Shop drawings shall be prepared by the ceiling system manufacturer. Show details of all finished work as indicated on drawings including the following items: attachments, anchors, reinforcements, assemblies and closing connections between members and with adjacent construction; location of all joints, joinery techniques and materials, fastening and sealing methods; and sealant materials and sealant systems. Identify all materials, including metal alloys, fasteners, all shop and field sealants by product name and locate on shop drawings. Shop drawings shall include instructions and explanatory details for sequence of installation of all materials. Show relative layout of all adjacent construction, all correctly dimensioned. Provide isometric or other drawings which explain or define certain interconnections when requested by the Architect.
1. Special requirement: Each ULPA filter framing system and framing system hanger for cleanroom ceilings shall be capable of carrying a working load of 220 lbs. at any point along the ceiling grid, a live load of 15 lbs./sq. ft. and a system dead load of 12 lbs./sq. ft.
Design working loads, minimum ultimate loads (yield), deflection and permanent set at working loads shall be as shown below for components or assemblies:
Design Min.
Component/ Working Ultimate Deflection/Set
Assembly Load Load (Yld.) (Working Load)
Lower rod to 800 lbs. 3,600 lbs. .0310”/.0000"
tee connection
Cross to main 800 lbs. 3,600 lbs. .0480”/.0100"
tee (load at
cross tee)
Tee profile 220 lbs. 1,800 lbs. .0630”/.0000"
4'’-0” span
(load mid-span)
Tee profile 220 lbs. 1,600 lbs. .0600”/.0000"
4'’-0” span
spliced,
(load mid-span)
Utility clip 220 lbs. 3,600 lbs. .0000”/.0000"
Provide laboratory test reports on load testing and ultimate loading of component assemblies. Submit calculations certified by a registered structural engineer.
C. Samples: Submit samples of each material and finish. Identify production processes and materials on each sample. Finish samples for all materials should be submitted in sets which shall include a minimum of two samples which show extreme dark and light color range for each finish. Color range and textures of production material shall conform to reviewed range samples.
D. Mock up: Provide a representative mock-up with a minimum of 2 pieces of each component assembled per manufacturer's instructions with all applicable grid accessories.
1.4 TRANSPORTATION AND PROTECTION
A. Grid:
1. Main tee components shall be pre-assembled prior to shipping. Pack tees in manufacturer's standard molded packing blocks, skid and shrink wrap bundles for shipping.
2. All cross tees to be packed in manufacturer's standard molded packing blocks, skid and shrink wrap bundles for shipping.
3. Components, crossovers, splices, hold down clips, etc., shall be boxed and shrink wrapped for shipping.
1.5 SPECIAL PACKAGING (Specify as required)
1.6 TESTING (Grid)
A. Provide manufacturers testing data stating that grid system and components meet all working loads, ultimate loads, and deflection and permanent set requirements as set forth in 1.3.B.1
1.7 SUPERVISION
A. Factory representative shall supervise entire cleanroom ceiling installation.
1.8 MAINTENANCE STOCK
A. Provide extra main tees; extra 4' and 2' cross tees; extra splices and crossovers; extra filter hold down clips; extra blank hold down clips.
PART 2 - PRODUCTS
2.1 FRAMING SYSTEM
A. UG-1 inverted T-grid system as manufactured by F.H. Chase, Inc., 120 Forbes Boulevard, Mansfield, MA 02048-1150. All tee members and components shall be extruded aluminum 6063-T5. All components shall be fabricated and/or machined to specified lengths and tolerances prior to anodizing.
1. System design allows for grid suspension points @ 4'-0" o.c. along main tee. Each suspension point along main tee shall be with a 3/8" dia. x 1/2" stainless steel cross dowel nut inserted thru the tee section. The cross dowel nut accepts a 1/4" dia. threaded stainless steel rod. Load bearing shall not be dependent on extruded aluminum screw slot. The ultimate load capacity of each suspension point shall be 3,600 lbs.
2. Cope each end of cross tee component for direct bearing of cross tee members on main tee.
3. Components:
a. Main tee: 2 1/2" deep x 2" wide lower flange in profile as shown. Top portion shall provide a continuous screw slot for assembly and component attachments. Lower portion shall provide continuous slots for utility component attachments. Hanger points shall incorporate cross dowel inserts with factory assembled lower hanging components and splice assemblies. Overall length shall be 12'-0" with tolerances + .000", - .010" (or length as shown on drawings).
b. Cross tee: Same profile as main tee with ends coped to provide full bearing on main tees. Nominal lengths: 8'-0", 4'-0", 3'-0”, 2'-0" (or as shown) on drawings. Length tolerances shall be + .000", - .010".
c. Perimeter components: Half tee or three quarter tee profile with telescoping wall molding insert and retaining clip as detailed; full tee profile with flush extrusion filler as detailed; or full tee profile with retaining clips as detailed.
d. Closures: Column enclosure frames shall be extruded aluminum profiles to provide a flat surface in line with the exposed lower face of the tee, and shop fabricated prior to anodizing.
e. Sprinkler pans (100% filter areas): Extruded aluminum profiles to provide a flat surface in line with the exposed lower face of the tee, shop fabricated and punched for dia. sprinkler head prior to anodizing.
f. Assembly components:
1. Crossover: At intersection of cross tee to main, an 8" long extruded member which mates with the upper profile of the tee members shall be fully bolted in place. Member shall contain a machined notch to capture the main tee and, when fully engaged, shall be capable of eliminating any lateral or torsional movements of the assembled joint. Where cross tees are not continuous, provide a half crossover.
2. Splices: At ends of main tees, provide a fully bolted splice assembly capable of developing the loading requirements of the system.
3. All assembly components are to be 6063-T5 aluminum, anodized after fabrication.
g. Clamping components: Provide filter and blank hold down clip assemblies designated to secure filter units, blank panels and flow thru lighting modules within the grid system.
1. Filter clips (minimum 4 per filter module) shall be fabricated to interface with the grid components and filter frame to prevent lateral movement and to seat when filter gasket is compressed to 50%. Clips shall be spring loaded to allow for tee deflection.
2. Blank panel clips (minimum 4 per blank panel) shall be fabricated to interface with the grid components and blank panel to prevent lateral movement and to seat when the blank panel gasket material is compressed to 50%. Clips shall be spring loaded to allow for tee deflection.
3. Flow thru lighting fixtures/filter assemblies shall be clamped utilizing an anodized aluminum yoke assembly at each end of the fixture, spring loaded and attached to the upper tee screw slots
4. All aluminum clamping components shall be anodized after fabrication.
B. Utility components: Shall be provided to interface within the inverted T-grid lower attachment slots. All utility components shall be fabricated of aluminum and anodized after machining and fabrication.
1. Utility clip: 4" long sliding dovetail locking clip with 2 each stainless steel fasteners and 3/8" dia. hole (to accept hanging device by others).
2. Access clip: 3" aluminum sliding dovetail locking clip with 2 each stainless steel fasteners, stainless locking plate, bolt and plastic thumb screw. Provide 4 each clip assemblies at each access panel.
3. Light mounting clip: 5" aluminum sliding dovetail light clip with 2 each stainless steel fasteners fabricated to accept surface mounted light fixture.
4. Partition clip: 4" wide extruded aluminum clip anchors to side slot of tee. Secures to each side of partition head track. Notched partition clip occurs at areas of grid intersection.
C. Finish: All aluminum components to be clear anodized after fabrication, prior to assembly; exposed components @ R204-R1, 8 min. etch.; assembly components (top side hardware) @ R204-R1, lite etch.
D. Fasteners:
1. All assembly fasteners shall be ¼”-20 full thread hex washer head machine bolts, zinc plated, Grade 2, unless noted.
2. Turnbuckle body 3/8”-16 shall be forged steel, zinc plated or galvanized.
3. Lower threaded rod with integral upper stop and locking nuts shall be ¼”-20 stainless steel.
4. Cross dowel nuts shall be 3/8" dia. x 1/2" with ¼”-20 to internal thread, stainless steel.
5. Robotic/utility clip fasteners shall be 10-24 x 5/8” flat head socket cap screw, stainless steel, 2/clip.
6. Self tapping machine bolts or thread forming screws are not acceptable.
E. Plenum dividers: Provide air-tight plenum dividers above ceiling grid (top of tee to underside of deck, etc.) as shown on drawings. Provide extruded aluminum plenum adapter to interface with ceiling tee properly notched to accommodate all splices, hangers, hold down clips, etc.
F. Leveling: Overall ceiling shall be level within +/-0.10" and shall be within +/-0.062" in 10'-0".
2.2 SOLID OR BLANK-OUT CEILING PANELS
A. Provide blanks, pre-fabricated of sizes shown on drawings, manufactured by
______, gasketed prior to installation.
1. Overall thickness shall be constructed of .032" aluminum face and backer sheet laminated .
2. Finish shall be .
3. Gasket shall be shop applied with staggered saw tooth mitered corners.
4. Sprinkler blanks at core areas - nominal 24" x 48" shall be factory punched in locations shown on drawings. Dia. to be coordinated with sprinkler drop.
2.3 FIXTURES (FLOW THRU)
A. Lighting fixture to be flow thru type suitable for mounting in custom grid profiles and accepting nominal 24" x 42" long filter terminal unit to provide a clamped unitized gasketed assembly.
1. Fixture to accept four 4'-0" 40 watt/277 volt lamps with shields. Wired and switched as single unit.
Lamps and shields to be provided by others under Section .
2. Fluorescent ballasts are to be mounted within a ballast cover/enclosure along the 48" dimension of the fixture, accessible and serviceable from the downstream (room side) of the fixture.
a. Ballasts shall be high frequency Triad-Utrad #B-240R277 or equal.
3. Fixture to be shop wired to external connector (reloc Lithonia: MSR). Connector to be provided by electrical contractor to fixture manufacturer. All penetrations shall be air tight.
4. All components shall be UL listed.
5. Lens shall be 1/2" cube egg-crate acrylic, sized to fixture and contained within a removable anodized aluminum lens frame.
a. Lens finish to be "White" acrylic.
6. All power, final wiring of light fixtures to be by others. Refer to Section .
B. Lamps: Refer to Electrical Fixture Schedule.
2.4 GASKET/SEALANTS
A. Gasket 1/4" x 3/8" pressure sensitive one-side, applied with staggered saw tooth mitered corners to filters, blank panels and flow thru lighting fixtures.
1. Color: Gray
2. Material: Gray "poly-B"
B. Caulking shall be Dow Corning #732 clear/aluminum and applied as follows:
1. In conjunction with tape sealants as shown on drawings at (wall) perimeter and other vertical intersections.
2. Grid assembly: Intersection of cross tees to main tee or wall details will receive a bedding of #732 on the upstream sections of the joints.
Excess will be wiped flush or removed with razor tool prior to installation of filters or blanks.
C. Garlite inserts shall be installed in tee slots (robotics groove) at all intersections.
PART 3 - EXECUTION
3.1 INSTALLATION
A. General: Install cleanroom ceiling system and light fixtures in accordance with manufacturer's published installation instructions.
B. Tolerances: Overall ceiling shall be level within +/-0.10". and shall be level within +/- 0.062" in 10'-0".
C. The interface of the framing system at the perimeter walls shall provide a finished, architecturally integrated appearance.
END - SECTION 13038 - CLEANROOM CEILING GRID
F.H. Chase, Inc.
120 Forbes Boulevard
Mansfield, MA 02048-1150
U.S.A.
Tel: (508) 339-3309 Section 13038
Fax: (508) 339-3306 Cleanroom Ceiling Grid
E-Mail: Page 1 of 9