SECTION 08 6315
SOLAR TRACKING SKYLIGHTS
EDIT NOTES:
1.
SOLAR TRACKING SKYLIGHTS (4’x4’OR 4’X8’) ALLOW INTERIOR SPACES
TO REPLACE ARTIFICIAL LIGHTING WITH NATURAL DAYLIGHT DURING
THE DAY TIME BY CONTINUALLY TRACKING THE SUN’S POSITION AND
CONSISTENTLY REFLECTING ITS LIGHT INDOORS. SOLAR TRACKING
SKYLIGHTS ARE RECOMMENDED FOR LARGE SPACES SUCH AS
GYMNASIUMS, MULTI-PURPOSE ROOMS, CAFETERIAS AND LIBRARIES.
2.
THE ENERGY EFFICIENCY OBTAINED IS CONTINGENT ON THE LIGHTING
CONTROL SYSTEM USED. THE ARTIFICIAL LIGHTING IS REQUIRED TO
OPERATE IN CONJUCTION WITH THE SKYLIGHT(S). SPACES PROVIDED
WITH SKYLIGHTS SHALL BE EQUIPPED WITH DIMMABLE LIGHT
FIXTURES, AND DAYLIGHT AND MOTION SENSORS. REFER TO GUIDE
SPECIFICATION SECTION 26 0923, FOR APPROVED LIGHTING CONTROLS
SYSTEM.
PART 1 - GENERAL
1.01 SUMMARY
A.
Section Includes:
1.
Solar tracking skylights, including active daylighting system with solar powered GPS tracking unit, mirror array and mounting curbs.
EDIT NOTE: DELETE/ADD RELATED SECTIONS AS NEEDED.
B.
Related Requirements:
1.
Division 01 - General Requirements.
2.
Section 03 3000 – Cast-in-Place Concrete.
3.
Section 05 1200 – Structural Steel Framing.
4.
Section 06 1000 - Rough Carpentry.
5.
Section 07 2200 – Roof and Deck Insulation.
6.
Section 07 4000 – Metal Roof Panels.
7.
Section 07 5413 – Polyvinyl-Chloride Roofing (Mechanically Attached for
Existing Facilities).
PROJECT NAME
SCHOOL NAME
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8.
Section 07 5415 - Polyvinyl-Chloride Roofing Mechanically Attached.
9.
Section 07 5419 - Polyvinyl-Chloride Roofing Adhered.
10.
Section 07 6000 - Flashing and Sheet Metal.
11.
Section 07 9200 - Joint Sealants.
12.
Section 09 2900 – Gypsum Board.
13.
Section 09 5113 – Acoustical Panel Ceilings.
EDIT NOTE: DELETE REFERENCE TO DIVISION 26 IF
ELECTRICALLY OPERATED SHADE TO DARKEN ROOM IS NOT
USED IN PROJECT.
14.
Division 26 – Electrical.
1.02 REFERENCES
A.
Aluminum Association – AA:
1.
AA DAF45: Designation System for Aluminum Finishes.
B.
American Architectural Manufacturers Association – AAMA:
1.
AAMA/WDMA/CSA/I.S.2/A440 - Standard/Specification for Windows,
Doors and Unit Skylights.
2.
AAMA 611 - Voluntary Specification for Anodized Architectural Aluminum.
C.
American Society of Heating Refrigerating and Air Conditioning Engineers –
ASHRAE:
1.
ASHRAE 90.1 – Energy Standards for Buildings except Low-Rise Residential
Buildings.
D.
American Society for Testing and Materials International – ASTM:
1.
ASTM A653 – Standard Specification for Steel Sheet, Zinc Coated
(Galvanized) or Zinc Iron Alloy Coated (Galvannealed) by the Hot Dip
Process.
2.
ASTM B209 – Standard Specification for Aluminum and Aluminum-Alloy
Sheet Plate.
3.
4.
ASTM B221 – Standard Specification for Aluminum and Aluminum-Alloy
Extruded Bars, Rods, Wire, Profiles and Tubes.
ASTM C920 – Standard Specification for Elastomeric Joint Sealants.
PROJECT NAME
SCHOOL NAME
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08 6315-2

5.
ASTM D256 - Standard Test Methods for Determining the Izod Pendulum
Impact Resistance of Plastics.
6.
ASTM D635 - Standard Test Method for Rate of Burning and/or Extent and
Time of Burning Plastics in a Horizontal Position.
7.
ASTM D785 - Standard Test Method for Rockwell Hardness of Plastics and
Electrical Insulating Materials.
8.
ASTM D1929 – Standard Test Method for Determining Ignition Temperature of Plastics.
9.
ASTM D2843 – Standard Test Method for Density of Smoke from the Burning of Decomposition of Plastics.
10.
ASTM D4586 – Standard Specification for Asphalt Roof Cement, Asbestos-
Free.
11.
ASTM D4802 – Standard Specification for Poly (Methyl Methacrylate) Acrylic
Plastic Sheet.
12.
ASTM D1003 - Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics.
13.
ASTM E84 – Standard Test Method for Surface Burning Characteristics of
Building Materials.
14.
ASTM E283 – Standard Test Method for Determining Rate of Air Leakage through Exterior Windows, Curtain Walls, and Doors under Specified Pressure
Differences across the Specimen.
15.
ASTM E330 – Standard Test Method for Structural Performance of Exterior
Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure
Difference.
16.
ASTM E331 – Standard Test method for Water Penetration of Exterior
Windows, Skylights, Doors and Curtain Walls, by Uniform Static Air Pressure
Difference.
17.
ASTM E1651 – Standard Test Method for Total Luminous Reflectance Factor by Use of 30/t Integrating-Sphere Geometry.
E.
International Organization for Standardization – ISO:
1.
ISO 6603 - Determination of Puncture Impact Behavior of Rigid Plastics.
F.
National Association of Architectural Metal Manufacturers – NAAMM:
PROJECT NAME
SCHOOL NAME
11/01/2012
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1.
NAAMM – Metal Finishes Manual.
G.
National Fenestration Rating Council Incorporated – NFRC:
1.
NFRC 100 – Procedure for Determining Fenestration Products U-Factors.
2.
NFRC 200 - Procedure for Determining Fenestration Product Solar Heat Gain
Coefficients at Normal Incidents.
H.
Occupational Safety and Health Administration – OSHA:
I.
1.
Standard 29 CFR Part 1926 - Safety and Health Regulations for Construction.
Society for Protective Coatings – SSPC.
J.
1.
SSPC-Paint 12 - Cold-Applied Asphalt Mastic (Extra Thick Film).
Underwriters Laboratories – UL:
1.
UL 972 – Burglary Resisting Glazing Material.
1.03 PERFORMANCE REQUIREMENTS
A.
Solar Tracking Skylight shall conform to the performance requirements of
AAMA/WDMA/CSA/I.S.2/A440:
1.
Air Leakage per ASTM E283 at 6.2 psf: Maximum allowed 0.3 cfm/ft
2
.
2.
Water Penetration Resistance per ASTM E331: No leakage.
3.
4.
Uniform Load Deflection per ASTM E330 at 30 PSF: No limit.
Uniform Load Structural per ASTM E330 at 60 PSF: No damage, maximum permanent deformation of 0.153 inch.
B.
Solar Tracking Skylight Energy Performance when tested in accordance to NFRC 100 and NFRC 200:
1.
2.
U Factor: 0.40.
Solar Heat Gain Coefficient (SHGC): 0.32 or less.
3.
C.
Dome:
Visible Light Transmittance (VLT): 0.91.
1.
Light Transmission per ASTM D1003: a.
Acrylic Dome: 91 percent at 0.177 inch thickness.
PROJECT NAME
SCHOOL NAME b.
Polycarbonate Dome: 89 percent at 0.12 inch thickness.
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2.
Rockwell Hardness: M45 per ASTM D785: a.
Acrylic Dome: 45 (M Scale). b.
Polycarbonate Dome: 125R (R scale).
3.
Impact Strength: a.
Acrylic Dome: 1.2 at 73 degrees F and 0.5 at 0 degrees F per ASTM
D256 (IZOD): b.
Polycarbonate Dome: 117 lb. ft per ISO 6603/1 E50.
4.
Dome Surface Burning Characteristics: Class A per ASTM E84.
D.
Energy Requirements: Glazing material shall have a maximum light characteristic that maximizes the shading factor. The combined inner/outer lens target values shall be as follows:
1.
Light Transmittance: 67.8 percent minimum. Class 1 and Class 3 acrylic.
2.
Light Transmittance: 60.0 percent minimum. Clear Armor Polycarbonate.
3.
Diffusion/Haze Factor: 100%.
4.
Solar Heat Gain Coefficient (SHGC): 0.49 maximum per NFRC 200.
5.
Assembly U Factor: 0.82 or lower in accordance to NFRC 100 or “unlabeled skylight” default requirements of ASHRAE 90.1.
E.
Fire Test Response Characteristics of Plastic Glazing:
1.
Self-Ignition Temperature: 650 degrees F or greater for plastic sheets when tested per ASTM D1929.
2.
Smoke Production Characteristics: Comply with one of the standards listed below: a.
Smoke Developed Index: 450 or less or less when tested in accordance to ASTM E84. b.
Smoke Density: 75 or less when tested in accordance to ASTM D2843.
3.
Relative Burning Characteristics when tested in accordance to ASTM D635: a.
Acrylic Glazing: Class CC2, burning rate of 2.5 inches per minute or less for nominal thickness of 0.060 or thickness indicated for use. b.
Polycarbonate Glazing: Class CC1, burning extent of one inch or less for nominal thickness of 0.060 or thickness indicated for use.
PROJECT NAME
SCHOOL NAME
11/01/2012
SOLAR TRACKING SKYLIGHTS
08 6315-5

F.
Fall Protection Test: Skylight dome shall be capable of withstanding the following loads as required by the OSHA General Industry Standard 29 CFR 1910.23 (e) (8) and
Cal OSHA:
1.
200 lbs-ft (applied) load of at least 200 pounds applied perpendicularly at any one area on the screen: No Damage.
2.
400 lbs-ft (2’ drop height) impact to center of dome: No Damage.
1.04 SUBMITTALS
A.
Product Data: Submit manufacturer’s technical data, including specifications, factory finishing, preparation and installation instructions, and storage and handling recommendations.
B.
Shop Drawings: Submit roof and ceiling plans locating units and their relation to adjacent construction. Provide installation and fabrication details indicating flashings, connections, material types, gauges and finishes.
C.
Material Samples:
1.
Submit finish Samples for aluminum materials and flashings.
2.
Submit dome Material Samples, minimum 6-inch by 6-inch.
D.
Test Reports: Submit nationally recognized testing agency or evaluation service reports attesting compliance with specified performance requirements.
E.
Submit service/ maintenance recommendations and replacement parts lists.
1.05 QUALITY ASSURANCE
A.
Qualifications of Manufacturer: Minimum 3 years experience in the manufacture of specified products.
B.
Qualifications of Installer:
1.
Minimum 3 years experience installing solar tracking skylights.
2.
Trained and approved by manufacturer.
1.06 DELIVERY, STORAGE AND HANDLING
A.
Delivery: Deliver materials in manufacturer’s original, unopened, undamaged containers with identification labels intact.
B.
Store products in manufacturer's unopened packaging protected from weather conditions until ready for installation.
PROJECT NAME
SCHOOL NAME
11/01/2012
SOLAR TRACKING SKYLIGHTS
08 6315-6

1.07 WARRANTY
A.
Manufacturer: Ten year material warranty.
B.
Installer: Five year installation warranty.
PART 2 - PRODUCTS
2.01 MANUFACTURER
A.
Provide products and systems manufactured by:
1.
Ciralight Global Inc., SunTracker.
2.
Solar Tracking Skylights, Inc.
3.
Equal.
2.02 COMPONENTS
A.
Framework: Extruded aluminum retaining cap and curb cap, refer to Fabrication
Article below.
B.
Dome:
1.
Acrylic or polycarbonate, thickness 0.177 inch.
2.
ASTM D4802 thermoformable monolithic sheet Category as standard with manufacturer, type UVA formulated with UV absorber, Finish 1, smooth or polished.
3.
Colorless and transparent.
EDIT NOTE: EDIT NOTE BELOW TO INDICATE NUMBER OF MIRRORS.
UNITS 4’ X 4’ REQUIRE ONE MIRROR; UNITS 4 X 8 REQUIRE THREE.
C.
Mirror Array:
1.
Single Mirror: Single piece of highly reflective Alanod aluminum, 0.02 inch thick.
2.
Triple Mirror: Three pieces of aluminum reflector electrolytically brightened anodized and coated with a super reflective oxide-layer system on one side to reflect light.
3.
Mirror reflection per ASTM E1651: 95%.
4.
Mirror array shall rotate to track the sun across the sky.
PROJECT NAME
SCHOOL NAME
11/01/2012
SOLAR TRACKING SKYLIGHTS
08 6315-7

D.
Tracking Unit:
1.
Solar powered global positioning system (GPS) controller with capability to accurately calculate and track sun position at intervals of approximately five minutes regardless of weather condition.
2.
Motor powered by super capacitors charged by photovoltaic cell, and provided with precision gears and sealed bearing for maintenance free operation.
3.
Tracking unit may be installed within the dome or on the exterior.
E.
Light Well Liner: Four aluminum panels, 0.039 inch thick, with pre-coated white reflective material. Sealed at the corners with weather stripping and screwed together with self-tapping screws. Lengths shall be adjustable to accommodate shaft requirements from roof to ceiling with integral angle frame support for bottom lens.
F.
Light Well Diffuser Lenses:
1.
General: a.
Acrylic or polycarbonate diffuser lens glazing. b.
Thermoformable extruded monolithic sheets, UV resistant, burglar resistant per UL 972. c.
Impact strength of 12 to 16 ft-lb/in of width when tested in accordance to ASTM D256, test method A (Izod).
2.
3.
Lens at top of light well: Flat with an overall thickness of 3 mm and 91% translucence.
EDIT NOTE: SELECT ONE OF THE PARAGRAPHS BELOW;
DELETE UNUSED OPTION.
Lens at bottom of light well: Raised pyramid shape with an overall thickness of
3 mm and 91% translucence.
4.
Lens at bottom of light well: White flat acrylic lens with 70% translucence for low ceiling installation.
EDIT NOTES:
1. SHADING UNITS ARE REQUIRED AT LIBRARIES AND MULTI-
PURPOSE ROOMS. DELETE PARAGRAPH G FOR GYMNASIUMS.
2. PROVIDE ELECTRICAL POWER AND KEYED SWITCH FOR
SHADE OPERATION.
G.
Shade Unit: Electrically powered and controlled darkening fabric shade mounted at the top of the light well.
H.
Roof Curb:
1.
PROJECT NAME
SCHOOL NAME
Frame: 18 gage, 12 inches high with 2 inches mounting flange, fully welded construction, and fabricated to match roof slope, with plumb and level top
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I.
surface. Corners mitered and welded. Web internally reinforced with 12 gage galvanized steel angles.
2.
Finish: G90 galvanized steel per ASTM A653.
3.
Liner: 22 gage galvanized liner. Space between curb and liner shall be filled with 1 ½ inches 3 pound density rigid insulation topped by pressure treated 2 x
2 inches wood nailer.
Glazing Gaskets: Closed cell foam.
2.03 MATERIALS
A.
Aluminum:
1.
Components: a.
Sheets: ASTM B209 alloy and temper to forming operations and finish requirements but with not less than the strength and durability of alclad alloy 3005-H25. b.
Extruded Shapes: ASTM B221, alloy and temper to suit structural and finish requirements but with not less than the strength and durability of alloy 6063-T52.
2.
Finishes: a.
Comply with NAAMM Metal Finishes Manual recommendations for application and designation of finishes. b.
Clear anodize finish per Aluminum Association designation AA-
C22A41: etched, medium matte, clear anodic coating, Class I
Architectural, 0.7 mils thick in compliance to AAMA 611 standards.
B.
Installation Materials:
1.
Bituminous Coating: SSPC-Paint 12, solvent type, bituminous mastic, nominally free of sulfur and containing no asbestos fibers, formulated for 15mil dry film thickness per coating.
2.
Mastic Sealant: Polyisobutylene; nonhardening, nonskinning, nondrying, nonmigrating sealant.
3.
Elastomeric Sealant: ASTM C920, Type S, Grade NS, Class 25 and uses NT,
G, A and O.
4.
Roofing Cement: ASTM D4586, asbestos free, compatible with roofing system.
5.
Fasteners and Accessories: Manufacturer’s standard corrosion-resistant, nonstaining, non-bleeding fasteners and accessories, compatible with adjacent materials.
PROJECT NAME
SCHOOL NAME
11/01/2012
SOLAR TRACKING SKYLIGHTS
08 6315-9

6.
Wood Curb: As specified in Section 06 1000, Rough Carpentry.
2.04
FABRICATION
A.
Framework: Retaining cap and curb cap fabricated of extruded aluminum alloy 6063-
TS with mitered and welded corners, integral condensation gutters and gaskets with a factory mounted airtight acrylic or polycarbonate diffuser lens glazing secured in place with weatherstripping and aluminum bracket. Integral gutters shall be provided with non-clogging weeps to collect and drain condensation to the exterior.
B.
Skylight shall be capable of accommodating expansion and contraction of components resulting from an ambient temperature change of 200 degrees F without causing buckling, excessive stresses on glazing, structural elements or fasteners.
C.
Fabricate skylights with thermal barrier separating interior metal framing from materials exposed to outside temperatures.
PART 3 - EXECUTION
3.01 EXAMINATION AND PREPARATION
A.
Examine the Work to determine that structure and substrate to receive system are properly prepared and ready to receive the Work of this section. Do not proceed until unsatisfactory conditions are corrected.
B.
Surfaces to be sealed shall be completely cleaned and dry. Verify and follow sealant manufacturer's written recommendations for proper cleaning, priming, and installation procedures.
3.02 PREPARATION
A.
Coordinate skylight installation of substrates, roof insulation, roofing, wood framing, steel curbs and flashing as required to ensure that each element of the Work performs properly and that combined elements are waterproof and weather tight.
B.
Install skylight units per manufacturer’s written installation instructions.
C.
Incompatible materials, such as aluminum and steel, shall be isolated from each other.
Aluminum shall be furnished with one coat of zinc chromate, one coat bituminous coating, and further protected where required with isolation tape to prevent contact with incompatible materials.
3.03 INSTALLATION
A.
Install skylight components true in plane, accurately aligned, and without warp or rack.
Adjust framing as needed to comply with manufacturer’s installation tolerances.
PROJECT NAME
SCHOOL NAME
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B.
Set skylight flanges in thick bed of roofing cement to form a seal. Fasten to curb with stainless steel fasteners with neoprene washers as indicated on approved shop drawings.
C.
Touch-up, repair or replace damaged products.
3.04
CLEAN UP
A.
Clean skylights inside and outside immediately after installation and after sealants have cured.
B.
Remove temporary protective coverings, strippable coatings and markings from prefinished metal surfaces.
C.
Remove rubbish, debris and waste materials and legally dispose of off the Project site.
3.05
PROTECTION
A.
Protect the Work of this section until Substantial Completion.
END OF SECTION
PROJECT NAME
SCHOOL NAME
11/01/2012
SOLAR TRACKING SKYLIGHTS
08 6315-11