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Stromberg Architectural GFRC Fabrications
SECTION 03 49 00
Copyright 2017 - 2020 ARCAT, Inc. - All rights reserved

          ** NOTE TO SPECIFIER ** Stromberg Architectural; GFRC Fabrications.
This section is based on the products of Stromberg Architectural, which is located at:
4400 Oneal St.
Greenville, TX 75402
Tel: 903-454-0904
Fax: 903-454-3642
Email: request info
[ Click Here ] for additional information.
Stromberg Architectural Products Inc is the world's leading producer of Glass Fiber-Reinforced Concrete. For more information, see
          PART 1GENERAL
          ** NOTE TO SPECIFIER ** Delete items below not required for project.
          A.Glass fiber reinforced concrete (GFRC) fabrications.
          ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
          A.Section 04 72 00 - Cast Stone Masonry.
          B.Section 05 50 00 - Metal Fabrications.
          C.Section 06 10 00 - Rough Carpentry.
          D.Section 06 63 00 - Plastic Railings.
          E.Section - .
          F.Section 09 90 00 - Painting and Coating.
          ** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
          A.ASTM C 150 - Standard Specification for Portland Cement.
          B.ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
          C.ASTM G 23 - Standard Practice for Operating Light-Exposure Apparatus (Carbon-Arc Type) With and Without Water for Exposure of Nonmetallic Materials.
          A.Submit under provisions of Section 01 30 00 - Administrative Requirements.
          B.Product Data: Manufacturer's data sheets on each product to be used, including:
          1.Preparation instructions and recommendations.
          2.Storage and handling requirements and recommendations.
          3.Installation methods.
          C.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.
          ** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.
          D.Selection Samples: For each custom finish specified, two complete sets of samples representing manufacturer's full range of available colors and patterns.
          E.Verification Samples: For each custom finish specified, two samples, minimum size 6 inches (150 mm) square, representing actual product, color, and patterns.
          A.Manufacturer Qualifications: Minimum 5 year experience manufacturing similar products.
          B.Installer Qualifications: Minimum 2 year experience installing similar products.
          1.Regularly engaged and experienced in the installation of glass fiber reinforced concrete or precast concrete units.
          ** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
          C.Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and application workmanship.
          1.Finish areas designated by Architect.
          2.Do not proceed with remaining work until workmanship is approved by Architect.
          3.Remodel mock-up area as required to produce acceptable work.
          A.Convene minimum two weeks prior to starting work of this section.
          A.Transport, lift, and handle units with care, avoiding excessive stress and preventing damage; use appropriate equipment.
          B.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.
          C.Handling: Handle materials to avoid damage.
          A.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.
          A.Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.
          PART 2PRODUCTS
          A.Acceptable Manufacturer: Stromberg Architectural, which is located at: 4400 Oneal St.; Greenville, TX 75402 ; Tel: 903-454-0904; Fax: 903-454-3642; Email: request info; Web:
          B.Email: Web:
          ** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
          C.Substitutions: Not permitted.
          D.Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
          A.SEQ level5Glass Fiber Reinforced Concrete Fabrications: High density concrete made of ASTM C 150 Portland cement, crushed stone, silica sand, and polymers reinforced with continuous filament glass fiber mat and structural reinforcing as required; asbestos free.
          ** NOTE TO SPECIFIER ** Delete color provision not required.
          1.Color: As selected from manufacturer's standard colors.
          2.Color: To match Architect's sample.
          3.Density: 140 pcf (2240 kg/cu m).
          4.Shell Thickness: 3/8 inch to 3/4 inch (9.5 mm to 19 mm), nominal.
          5.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.
          6.Weather Resistance: No significant loss in strength or change in appearance after 200 hours accelerated weathering conducted in accordance with ASTM G 23.
          7.Flexural Strength: 1000 to 1800 psi (6.9 to 12.4 MPa).
          8.Modulus of Elasticity: 1.4x106 to 2.9 x106.
          9.Compressive Strength: Over 5000 psi (34 MPa).
          10.Variation from Dimensions Indicated on Drawings: Plus and minus 1/8 inch (3 mm), maximum.
          11.Variation from Plane along Edge or Surface: Plus and minus 1/16 inch per linear foot (1.5 mm in 300 mm), maximum.
          12.Outside Corner Radius: 1/16 inch to 1/8 inch (1.5 mm to 3 mm).
          13.Draft Angle: 3 degrees, minimum, on returns, setbacks, reveals, and grooves.
          ** NOTE TO SPECIFIER ** Delete anchorage provision not required.
          14.Provide concealed anchorage points for plaster type wire anchors.
          15.Provide screwed or bolted anchors with reinforced holes through face of units.
          16.Provide anchors and reinforced anchoring points as indicated on drawings.
          A.Do not begin installation until substrates have been properly prepared.
          B.If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
          C.Check field dimensions before beginning installation. If dimensions vary from design dimensions for proper installation, notify Architect and wait for instructions before beginning installation.
          A.Clean surfaces thoroughly prior to installation.
          B.Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
          A.SEQ level4Install in accordance with applicable code and manufacturer's recommendations, plumb and true to line; shim where necessary.
          B.Provide control joints at not more than 35 feet (10.5 m) on center if not indicated on drawings.
          C.Provide expansion joints where moving joints in substrate occur.
          D.Patch exposed anchor points to match color and texture of unit.
          A.Protect installed products until completion of project.
          B.Touch-up, repair or replace damaged products before Substantial Completion.