SECTION 03 49 43 SECTION 10 74 00 Glass Fiber Reinforced Concrete Domes and Cupolas
PART 1 GENERAL
1.1 SECTION INCLUDES
- Glass fiber reinforced concrete (GFRC) dome fabrications as indicated on the drawings.
1.2 RELATED SECTIONS
- Section 05500 - Metal Fabrications: Supplementary supports for large items.
- Section 06100 - Rough Carpentry: Supplementary supports for large items.
- Section 09900 - Paints and Coatings: Field painting and sealing prior to painting.
- ASTM C 150 - Standard Specification for Portland Cement; 1999a.
- ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials; 1999.
- ASTM G 23 - Standard Practice for Operating Light-Exposure Apparatus (Carbon-Arc Type) With and Without Water for Exposure of Nonmetallic Materials; 1996.
- Submit under provisions of Section 01300.
- Product Data: Manufacturer's data sheets on each product to be used, including dimensions, finishes, storage and handling requirements and recommendations, and installation recommendations.
- Shop Drawings: For custom items, provide drawings showing dimensions, layout, joints, details, and interface with adjacent work; include field measured dimensions of the spaces where items are to be installed, if critical to proper installation.
- Samples: For each custom finish specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and patterns.
1.5 QUALITY ASSURANCE
- Manufacturer: Obtain GFRC dome(s) as manufactured by a firm specializing in the manufacture of GFRC domes, with a minimum of ten years experience.
- Provide a list of projects comparable in size, scope, and complexity as indicated.
- Provide verification that glass fiber reinforced concrete dome meets or exceeds products specified.
- Installer Qualifications: Regularly engaged and experienced in the installation of glass fiber reinforced concrete or precast concrete units.
1.6 DELIVERY, STORAGE, AND HANDLING
- Transport, lift, and handle units with care, avoiding excessive stress and preventing damage; use appropriate equipment.
- Store products in manufacturer's unopened packaging until ready for installation, in a clean dry area protected from weather, moisture and damage; store units upright and not stacked unless permitted by manufacturer. Product shall be stored clear of the ground on non-staining pallets or other temporary planking.
PART 2 PRODUCTS
- Acceptable Manufacturer: Stromberg Architectural Products Inc; PO Box 8036, I-30 West, 4400 Oneal, Greenville, TX 75404. ASD. Tel: (903) 454-0904. Fax: (903) 454-3642. Email: firstname.lastname@example.org. www.strombergarchitectural.com.
- Substitutions: Not permitted.
- Requests for substitutions will be considered in accordance with provisions of Section 01600.
Glass Fiber Reinforced Concrete Fabrications: High density concrete made of ASTM C 150 Portland cement, crushed stone, silica sand, and polymers reinforced with glass fiber and structural reinforcing as required; asbestos free.
- Color: As selected from manufacturer’s selection.
- Color: To match Architect’s sample.
- Density: 140 pcf (2240 kg/cu m).
- Shell Thickness: 3/8" to ¾ inch (9.5 mm), nominal.
- Surface Burning Characteristics: Flame spread index of 0, smoke developed index of 5; when tested in accordance with ASTM E 84. Fuel contribution of 3.
- Weather Resistance: No significant loss in strength or change in appearance after 200 hours accelerated weathering conducted in accordance with ASTM G 23.
- Flexural Strength: 1000 to 1800 psi (6.9 to 12.4 MPa).
- Modulus of Elasticity: 2 x 10^5 psi (1370 MPa).
- Compressive Strength: Over 5000 psi (34 MPa).
- Variation from Dimensions Indicated on Drawings: Plus and minus 1/8 inch (3 mm), maximum.
- Variation from Plane Along Edge or Surface: Plus and minus 1/16 inch per linear foot (1.5 mm in 300 mm), maximum.
- Outside Corner Radius: 1/16 inch to 1/8 inch (1.5 to 3 mm).
- Draft Angle: 3 degrees, minimum, on returns, setbacks, reveals, and grooves.
- Provide concealed anchorage points for plaster type wire anchors.
- Provide screwed or bolted anchors with reinforced holes through face of units.
- Provide anchors and reinforced anchoring points as indicated on drawings.
PART 3 EXECUTION
- Do not begin installation until substrates have been properly constructed; verify that substrates are plumb and true.
- If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
- Check field dimensions before beginning installation. If dimensions vary too much from design dimensions for proper installation, notify Architect and wait for instructions before beginning installation.
- Clean surfaces thoroughly prior to installation.
- Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
- Install supplementary temporary and permanent supports as required for proper installation.
- Install in accordance with applicable code and manufacturer’s recommendations, plumb and true to line; shim where necessary.
- Provide control joints at not more than 35 feet (10.5 m) on center if not indicated on drawings.
- Provide expansion joints where moving joints in substrate occur.
- Patch exposed anchor points to match color and texture of unit.
- Protect installed products until completion of project.
- Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION