PART 1 — GENERAL
1.01 RELATED DOCUMENTS
- Drawings, conditions of the contract and Division 1 Specifications sections, apply to work of this section.
- Section Includes: Architectural Fiberglass Reinforced Polymer (FRP) Decorative Self-Supporting Dome for exterior application. (Insert interior dome if applicable.)
1.03 RELATED SECTIONS
- Section 05120 — Structural Steel: Attachment framing for architectural fiberglass dome.
- Section 06100 — Rough Carpentry: Framing of opening and blocking.
- Section 07900 — Joint sealants and field applied sealants.
- Section 07230 — Spray Applied Insulation.
1.04 DESIGN REQUIREMENTS
- Architectural fiberglass dome shall be designed as a self-supporting fiberglass structure with integral framing system. No additional skeleton structural framing shall be required to support the fiberglass dome.
- Installed architectural fiberglass dome and fastening systems shall be designed, engineered, fabricated, and installed to conform to the state codes, local codes, and the Architect's design.
- Shop Drawings: Include plans, elevations, sections, profiles, and details of dome sections. Illustrate dimensions, adjacent construction, materials, thickness, fabrications details, required clearances, field jointing, colors, finishes, methods of support, attachments, anchorage to substrates, integration of components, and list of part numbers that coordinate with labeled architectural fiberglass parts.
- Professional Engineering, if required, shall include calculations and stamped drawings by P.E. registered in the state of dome installation, to meet all state and local codes.
- Provide a list of dome projects demonstrating the capability of manufacturing domes comparable in size, scope, and complexity as indicated.
- Submit Manufacturer's current valid certification with the Certified Composites Technician (CCT) program created by the American Composites Manufacturers Association (ACMA).
- Submit Manufacturer's internal Quality Control & Assurance Procedures based upon provisions published in the "Guidelines and Recommended Practices for Fiberglass Reinforced Plastic Architectural Products" upon request.
- Product Data: Submit Manufacturer's product data and installation instructions.
- Product Samples: Submit minimum 3-inch x 5-inch samples in specified color, texture and finish when applicable.
1.06 QUALITY ASSURANCE
- Obtain architectural fiberglass dome from a single source manufacturer that has the ability and resources to comply with the requirements and schedule of the project.
- Manufacturer to comply with Quality Control & Assurance Procedures and fabricate architectural fiberglass based upon provisions published in the "Guidelines and Recommended Practices for Fiberglass Reinforced Plastic Architectural Products".
- Inspect each molded dome section to ensure that it complies with specified requirements, including nominal dimensions.
1.07 MANUFACTURER'S QUALIFICATIONS
- Manufacturer: Provide products manufactured by a firm specializing in the manufacture of fiberglass architectural domes, in the United States with a minimum of ten (10) years experience.
- Manufacturer shall demonstrate current valid certification and participation in the CCT program and fabricate material based upon provisions published in the "Guidelines and Recommended Practices for Fiberglass Reinforced Plastic Architectural Products".
- Provide verification that architectural fiberglass dome meets or exceeds products specified.
1.08 DELIVERY, STORAGE AND HANDLING
- Handle, store and transport architectural fiberglass dome according to Manufacturer's recommendations and in a manner that prevents damage.
- Protect architectural fiberglass from damage by retaining any shipping protection and store in a secure place until installation.
- Damage Responsibility: Except for damage caused by others, the installer is responsible for chipping, cracking, or other damage to fiberglass fabrications, after delivery to the jobsite and until installation is completed and inspected and approved by the Architect or Owner's representative.
- Warrant architectural fiberglass dome to be free from defect due to materials and workmanship for one year.
PART 2 — PRODUCTS
2.01 ACCEPTABLE MANUFACTURER
Architectural Fiberglass, Inc.
8300 Bessemer Ave., Cleveland, Ohio 44127
Toll Free 1-888-483-1775
2.02 FABRICATION PATTERNS/MOLDS
- Custom Pattern/Mockups: Patterns and mockups shall be hand-carved and/or CNC machined by skilled pattern makers with minimum of ten (10) years experience with architectural elements. Patterns and mockups shall be available at manufacturing facility for Architect's inspection and approval before molds are produced.
- Custom Molds: Molds shall be produced with ample layers of tooling resin, tooling gel-coat, glass fibers and/or flexible rubber by skilled mold makers with minimum of ten (10) years experience with architectural elements. Produced molds shall have rigidity and thickness to prevent distortion and deflection of molded architectural fiberglass.
2.03 MATERIALS CHARACTERISTICS
- MOLDED EXTERIOR SURFACE: U-V inhibited, NPG-ISO polyester gel coat, 18 to 22 mils thick. Color to match in texture and finish of sample supplied by Architect.
- BARRIER COAT: Specifically formulated backup polyester surface veil 18-20 mils thick to prevent glass print through and ultimate Class A finish.
- BACK UP LAMINATE:
- Resin: Polyester resin shall be fire retardant and meet Class 1 flame spread rating of 25 or less and smoke density under 450 without the use of antimony trioxide as characterized by the ASTM E-84 tunnel test at typical 1/8" glass mat laminate. General purpose resin will not be permitted.
- Filler: Functional filler to be added to resin matrix to minimize shrinkage, add stiffness, control opacity, add fire retardance, improve surface finish, minimize crazing, and control dimensional stability from weather extremes.
- Fiberglass Reinforcement: Type "E" fiberglass, glass cloth, matt and/or random chopped glass fibers. Glass content approximately 20% to 30%.
- Laminate Thickness: Nominal laminate shall be minimum 3/16" thickness. Larger dome sections shall be manufactured with additional core reinforcements and/or sandwich structure added as required for rigidity and structural integrity.
- Dome shall be fabricated with integral framing system without the need for additional skeleton framing after assembly.
- Dome sections shall be formed with assembly bolting flanges with sufficient depth to provide structural integrity and to accommodate gaskets, fasteners, and sealant.
- Dome sections shall be manufactured for proper panel-to-panel alignment and for weather-tight installation.
- Dome sections shall be manufactured as a single unit spanning entire profile from base of dome to top of dome.
- Connection flanges shall be reinforced with polywood or other treated rot-proof material for connection to building substrate.
- Dome sections shall be factory pre-drilled, labeled, and pre-assembled for field reassembly.
2.05 AVERAGE MECHANICAL PROPERTIES:
|PROPERTY ||VALUE ||TEST METHOD|
|Tensile Strength ||12,000 PSI ||ASTM D638|
|Flexural Strength ||20,000 PSI ||ASTM D790|
|Flexural Modulus ||0.9 x 106 PSI ||ASTM D790|
|Compressive Strength||17,000 PSI ||ASTM D695|
|Bearing Strength ||9,000 PSI ||ASTM D638|
|Thermal Expansion ||10 x 10-6 (°F) || |
|Specific Gravity ||1.5 || |
- Dome shall be finished with colored gel coat or Sherwin Williams Polane S Plus Polyurethane Enamel Coating as selected by Architect or Owner's representative. Surface texture / exposed side shall be smooth or textured based upon approved sample.
- Part Thickness: + or − 1/8 inch.
- Gel Coat Thickness: + or − 2.5 mils.
- Length: + or − 1/8.
- Variation from Square: 1/8 inch.
- Hardware Location Variation: + or − 1/4 inch.
- Identify each architectural fiberglass dome section to coordinate with shop drawings.
- Number dome sections showing sequence of assembly.
2.09 CURING AND CLEANING
- Cure and clean components prior to shipment and remove material which may be:
- Toxic to plant or animal life.
- Incompatible with adjacent building material.
2.10 ANCHORS AND FASTENERS
- Contractor to provide anchors, fasteners, gaskets, and other accessories for proper installation of architectural fiberglass dome as recommended and approved by fiberglass fabrication manufacturer. Dome manufacturer to specify the above accessories.
PART 3 — EXECUTION
3.01 PRE-INSTALLATION EXAMINATION
- Carefully observe and verify field conditions that substrates are ready for installation of architectural fiberglass dome. Contractor shall verify on-site dimensions with shop drawings and assume full responsibility for fitting the components to the structure.
- Verify that bearing surfaces are true and level.
- Verify that dome connection framing has been constructed to allow accurate placement, alignment and connection of architectural fiberglass dome to structure.
- Report discrepancies between design dimensions and field dimensions, which could adversely affect the dome installation, to the Architect and/or Owner's representative.
- Do not proceed with installation of dome until discrepancies are corrected, or until installation requirements are modified and approved by the Architect and/or Owner's representative.
- Beginning of installation means acceptance of existing conditions and fiberglass materials.
- Install architectural fiberglass dome in accordance with Manufacturer's instructions and approved shop drawings.
- Apply continuous run of sealant and expandable cellular foam gasket as recommended per Manufacturer's instructions and approved shop drawings to the bolting flanges of all sections for weather-tight installation.
- Dome to be assembled on level surface and raised into place.
- Exterior dome shall be field insulated for water tightness and to prevent condensation when installed on unfinished roof or when interior fiberglass dome is required. Field applied spray insulation to be sprayed on interior surface of exterior dome. Insulation shall be sprayed and encapsulate entire surface including attachment flanges, anchor bolts, assembly bolts, and perimeter bolting flange.
- Flashing shall be installed around the perimeter of the dome structure per Manufacturer's instructions and approved shop drawings.
- Exterior dome shall receive final sealant application on the exterior joints after installation.
- Interior dome joints (when applicable) shall be finished with polyester body filler and fiberglass mesh tape. Joints to be filled, sanded, primed and painted for monolithic appearance.
3.03 ALLOWABLE TOLERANCES FOR INSTALLED UNITS
- Maximum Offset from True Alignment: 1/4 inch in 20 feet.
- Maximum Variation from True Position: 1/2 inch in 20 feet.
- Clean installed architectural fiberglass dome using cleaning methods and material approved by Manufacturer.
3.05 PROTECTION OF INSTALLED FABRICATIONS
- Comply with Manufacturer's recommendations and instructions for protecting installed dome during construction activities.
END OF SECTION