ARCAT

 SECTION 08 62 23 - Tubular SkylightsTUBULAR SKYLIGHTS Display hidden notes to specifier. (Don't know how? Click Here) Copyright 2012 - 2015 ARCAT, Inc. - All rights reserved** NOTE TO SPECIFIER ** DERBIGUM Americas, Inc.; tubular skylights.This section is based on the products of DERBIGUM Americas, Inc., which is located at: 4800 Blue Parkway. Kansas City, MO 64130. Toll Free Tel: (800) 727-9872. Tel: (816) 921-0221. Fax: (816) 924-1542. Email: elizabeth@derbigum.us. Web: derbigum.usDERBIGUM Americas, Inc. made its introduction to the United States roofing market in 1979 when a group of roofing contractors-turned-investors purchased the marketing and manufacturing rights to DERBIGUM in North America. Known then as DERBIGUM America Corporation, DERBIGUM offered American building owners a durable alternative to failing built-up roofs and flimsy EPDM and PVC single ply membranes. Its success and acceptance was immediate.Today, DERBIGUM is an undisputed industry leader. With 350 employees worldwide, the company is present across the United States, Europe, Africa and Asia. Three production sites - two in Belgium and one in the US - turn out over 161 million square feet of DERBIGUM membranes and 77 million lbs of liquid products annually.

GENERAL

SECTION INCLUDES

Tubular skylight system consisting of collector dome, roof flashing unit, light pipe, and diffuser assembly.

RELATED SECTIONS

** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.

Section 06 10 00 - Rough Carpentry.

Section 07 31 29.13 - Wood Shingles.

Section 07 50 00 - Membrane Roofing.

Section 07 60 00 - Flashing and Sheet Metal.

Section 08 60 00 - Roof Windows and Skylights.

REFERENCES

** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.

American Architectural Manufacturers Association (AAMA): AAMA/WDMA/CSA 101/I.S. 2/A440 - Specification for Windows, Doors and Unit Skylights.

American National Standards Institute (ANSI): ANSI Z97.1 - Safety Glazing Materials Used in Buildings - Safety Performance Specifications and Methods of Test.

ASTM International (ASTM):

ASTM B 209 - Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate.

ASTM B 221 - Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes.

ASTM D 256 - Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics.

ASTM D 542 - Standard Test Method for Index of Refraction of Transparent Organic Plastics.

ASTM D 635 - Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position.

ASTM D 638 - Standard Test Method for Tensile Properties of Plastics.

ASTM D 696 - Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics between -30 Degrees C and 30 Degrees C with a Vitreous Silica Dilatometer.

ASTM D 785 - Standard Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials.

ASTM D 790 - Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials.

ASTM D 792 - Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement.

ASTM D 1003 - Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics.

ASTM D 1925 - Test Method for Yellowness Index of Plastics.

ASTM D 1929 - Standard Test Method for Determining Ignition Temperature of Plastics.

ASTM D 4586 - Standard Specification for Asphalt Roof Cement, Asbestos-Free.

SUBMITTALS

Submit under provisions of Section 01 30 00 - Administrative Requirements.

Product Data: Manufacturer's data sheets on each product to be used, including:

Preparation instructions and recommendations.

Storage and handling requirements and recommendations.

Cleaning methods.

Shop Drawings: Submit shop drawings showing layout, profiles, product components, anchorage, flashing, accessories, including sections, details of connections to roof and other adjoining work to ensure structural integrity and interference avoidance with other building systems and reflected ceiling plans.

** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.

Selection Samples: Two complete sets of samples, representing manufacturer's full range of available products and finishes.

Verification Samples: For each product and finish specified, two samples representing actual products and finishes.

QUALITY ASSURANCE

Manufacturer Qualifications: Manufacturer capable of fabricating tubular skylight systems that meet or exceed performance requirements as indicated.

Installer Qualifications: Certified roofing contractor for roofing system in place trained by manufacturer in installation of specified tubular skylights.

DELIVERY, STORAGE, AND HANDLING

Do not scratch or damage collection dome. Protect surface from damage.

Deliver, store and handle materials and products in strict compliance with manufacturer's instructions and recommendations and industry standards.

Store materials in manufacturer's original sealed, labeled packaging until ready for installation and in accordance with manufacturer's instructions. Protect from damage.

PROJECT CONDITIONS

Maintain environmental conditions (temperature, humidity and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's recommended limits.

SEQUENCING AND SCHEDULING

Conference: Convene a pre-installation conference to establish procedures to maintain optimum working conditions and to coordinate this work with related and adjacent work.

WARRANTY

Manufacturer's Standard Warranty: Limited warranty to repair or replace any tubular skylight that fails in materials or workmanship.

Warranty Period: 10 years.

PRODUCTS

MANUFACTURERS

Acceptable Manufacturer: DERBIGUM Americas, Inc., which is located at: 4800 Blue Pkwy.; Kansas City, MO 64130; Toll Free Tel: 800-727-9872; Tel: 816-921-0221; Fax: 816-924-1542; Email: elizabeth@derbigum.us; Web: derbigum.us

** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.

Substitutions: Not permitted.

Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.

TUBULAR SKYLIGHT FABRlCATlON

Dimensions:

Internal Diameter: 22.25 inches (565 mm).

Length below Top of Flashing Unit: 7.75 inches (197 mm).

System Performance:

Tubular skylights shall be factory assembled and delivered to project ready to install with no additional assembly required.

Dome shall securely attach to flashing in a manner fully supporting dome with no stress concentrations in dome or fastening system.

Tubular skylight seals shall be tested prior to shipment. If any seals are broken or damaged, entire unit must be replaced. No field repairs of any components are allowed except dome replacement. Instructions for dome replacement are shipped with replacement domes.

Fully assembled tubular skylights shall meet or exceed the following requirements when tested in accordance with AAMA/WDMA/CSA 101/I.S. 2/A440:

Air Infiltration Test: Air infiltration will not exceed 0.10 cfm/sq.ft. across aperture with a chamber pressure of +01.57 and -1.57 psf.

Water Penetration Test: No water shall flow over interior face during 4 five minute cycles and 1 fifteen minute cycle with a chamber pressure of 12.00 psf.

Uniform Load Deflection Test: Deflection on unit shall be less than L/175 with a chamber pressure of +50 and -50 psf.

Structural Load Test: Permanent set shall be less than 0.3 percent L with a chamber pressure of +100 and -100 psf.

Material Compliance: Values listed below apply to typical 0.250 inch (6 mm) thickness.

Specific Gravity (ASTM D 792): 1.19.

Tensile Strength (ASTM D 638): 9,800 psi.

Elongation, Rupture: 4 - 6 percent.

Modulus of Elasticity: 470,000 psi.

Flexural Strength (ASTM D 790): 17,000 psi.

Modulus of Elasticity: 490,000 psi.

Impact Strength, Izod Milled Notch (ASTM D 256): 0.36 ftlbs/inch of notch.

Rockwell Hardness (ASTM D 785): M-95.

Refractive Index (ASTM D 542): 1.49.

Yellowness Index (ASTM D 1925): Less than 1.

Haze (ASTM D 1003): Less than 1 percent.

Light Transmission, Total (ASTM D 1003): 92 percent.

Maximum Recommended Continuous Service Temperature: 160 degrees F (71 degrees C).

Coefficient of Linear Thermal Expansion (ASTM D 696): 0.000040 in/in - degree F.

Flammability, Burning Rate (0.060 inch - 0.25 inches) (ASTM D 635): CC2.

Self Ignition Temperature (ASTM D 1929): 850 degrees F (454 degrees C).

Upper Collection Domes:

Colorless dome shall have visible light transmission rating of no less than 92 percent.

Fabricate dome from 0.160 inch thick (4 mm) colorless, optical grade material with crystal clear forming capabilities.

Seals:

Dome seal shall allow for breathing to outside but remain water-resistant.

Seal gasket materials shall be polyester fiber ultrasonically welded to polypropylene backing.

Seal shall keep warm moist building air from entering into tubular unit and condensing on upper dome.

Light Pipes:

Sheets: ASTM B 209 alloy and temper to suit forming operations and finish requirements but not less than strength and durability of alclad Alloy 3005-H25.

Extruded Shapes: ASTM B 221 alloy and temper to suit structural and finish requirements but not less than strength and durability of Alloy 6063-T52.

Aluminum components shall have no galvanic corrosion from dissimilar metals or rust streaking. Steel and plastic components are not allowed.

Light pipe construction shall be rolled, mechanically riveted, and aluminum taped.

Light pipe tube material shall be manufactured with total reflectivity of no less than 98 percent, forming cylindrical light pipe.

Lower Light Diffuser Domes: Dome material shall be 100 percent virgin acrylic, inverted pattern-12 geometry for maximum light delivery and minimizing wasted high angle light in upper portions of the space.

FLASHING

Roof flashing shall be an integral, seamless, aluminum unit designed for optimal waterproof installation creating a 8-1/2 inch (216 mm) curb above existing finished rooftop.

Factory-applied closed-cell urethane foam between inside of roof flashing unit and external surface of light pipe; eliminates warm building air reaching or condensing on roof flashing.

INSTALLATION MATERIALS

Roofing sealants and waterproofing systems as required by roofing contractor and Owner's roof assembly system.

Joint Sealants: As required for compatibility with Owner's roof assembly system.

Mastic Sealant: Polyisobutylene; nonhardening, nonskinning, nondrying, nonmigrating sealant.

Roofing Cement: ASTM D 4586, asbestos free, designed for trowel application or other adhesive compatible with roofing system.

EXECUTION

EXAMINATION AND PREPARATION

Prepare substrates and openings using the methods recommended by the manufacturer for achieving best result for the substrates under project conditions.

Do not begin installation until all locations have been verified for appropriate placement. Do not proceed with installation until substrates and openings have been prepared using the methods recommended by the manufacturer and deviations from manufacturer's recommended tolerances are corrected. Commencement of installation constitutes acceptance of conditions.

Take necessary precautions and field verify that installed units will not interfere with roof top units, accessories, hatches, vents, stacks, access to equipment requiring maintenance, and the like.

Field verify that tubular skylights will not be blocked from direct sun light due to changes in roof height, firewalls, parapets, or equipment. If a potential conflict arises, resolve with Owner prior to installation.

Field verify, inside facility, that no obstructions are within roof structure or facility below unit locations including, but not limited to, structural members, gas lines, water or sewer pipes, suspended HVAC equipment, electrical distribution, owner process equipment, conveyors, or any other item that may interfere with safe and effective installation.

When installing an array of tubular skylights, take care to strike a consistent and square grid so units align cleanly in facility where possible. If an obstruction is encountered requiring an offset from array, consult with Owner to confirm alternate locations prior to proceeding with installation.

If preparation is the responsibility of another installer, notify Architect in writing of deviations from manufacturer's recommended installation tolerances and conditions.

INSTALLATION

Install in accordance with manufacturer's instructions and in proper relationship with adjacent construction. Comply with the following:

Tubular skylights shall be and look identical to each other after installation.

No dents or deformation of flashing or light pipe are allowed.

Do not paint or coat tubular skylight.

Do not substitute fasteners installed on pre-assembled unit.

Do not attach unit to building structure. Tubular skylight shall move with roofing system for long-term seal integrity.

Flash on the vertical surface of cylinder and past mounting flange to create monolithic water proofing system.

Inspect for watertight and weathertight installation. Adjust until satisfactory results are obtained.

CLEAN-UP AND PROTECTION

Clean exposed dome surfaces using a soft damp cloth and water as required leaving a clean dome.

Remove all packaging, materials, and debris from rooftop to leave job site in a clean and professional manner.

Protect installed products until completion of project. Do not scratch or damage collection dome. Protect surface from damage.

Touch-up, repair or replace damaged products before Substantial Completion.

END OF SECTION ................
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