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Why Stonewear

Why GFRC

StoneForm™

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DOS Specification

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Models:

Decorative Security Barrier System

A. Section Includes:

1. Factory Finished Units: Provide Stonewear finished glass fiber reinforced concrete (GFRC) precast planters with StoneForm™ enclosure around preengineered reinforcing steel cage for complete installation.

A. American Society for Testing and Materials (ASTM):

1. ASTM C 33-86: Concrete Aggregates.

2. ASTM C 150-86: Portland Cement.

3. ASTM C 979-82(1986): Pigments for Integrally Colored Concrete.

B. American Welding Society (AWS) D1.1-88: Structural Welding Code, Steel.

C. Prestressed Concrete Institute (PCI) MNL-128-87: Recommended Practice for Glass Fiber Reinforced Concrete Panels.

D. Prestressed Concrete Institute (PCI) MNL-117-77: Manual for Quality Control for Plants and Production of Architectural Precast Concrete Products.

A. Fire Rating: Provide units conforming with Underwriters Laboratories (UL), Class A. maximum 25 flame spread; maximum 25 smoke contributed, ASTME 84-89.

B. Installer Qualifications: Firm with minimum five years successful experience installation of precast concrete planters, concrete placement, and acceptable to planter manufacturer.

A. Handling: Handle site amenities in positions consistent with their shape and design; lift and support only from points under planter unless specific lift embeds are specified in shop drawings.

B. Protection: Protect site amenities to prevent staining, chipping, and spalling; damaged units will be rejected.

A. Services: Do not install units until mechanical and electrical services located behind units are completed, tested, and approved.

B. Subsurface excavation and foundations per plans and specifications if applicable.

A. GFRC site amenities:

1. Site Amenities: Glass fiber reinforced concrete (GFRC) precast site amenities suitable for interior/exterior and high traffic applications.

a. Cement: ASTM C 150, use only one brand and type of cement throughout Project.

b. Glass Fibers: Alkali resistant (AR) glass fibers produced specifically for use in glass fiber reinforced concrete; manufacturer's standard types.

1) Glass Content of GFRC unit to be minimum 3% in minimum 1" - 1 1/2" length.

c. Aggregates: Clear silica sand passing No. 16 (1.18mm) sieve; washed, dried, and free from deleterious materials; provide type with successful history of use in GFRC or as specified by manufacturer.

d. Compressive Strength: Minimum 3000 psi.

e. Shell Thickness: 3/8" to 5/8", or as specified per plans and specifications.

f. Density: Approximately 120 pcf.

g. Polymer Admixture: Stonewear’s standard acrylic thermoplastic copolymer.

h. All planters are water tight. No membranes are required or used with GFRC planters.

2. Finishes:

a. Factory Finished Units: Stonewear’s standard finish as selected by Architect and indicated on Drawings.

1) Cement: White or grey as consistent with final finish.

2) Facing Aggregates: ASTM C 33 (less gradation), clean, hard, durable, inert, and free of staining and deleterious materials; as required to match approved samples.

3) Color: ASTM C 979, pure, non-fading mineral oxides which do not impair strength of GFRC designed and mixed to provide color matching approved samples; maximum 10% cement weight.

4) Applied finishes: ASTMD 4060 waterborne crosslinked acrylic 49.5 +/- 2% solids by weight providing 1000 cycles per .001 inch resistance to abrasion.

B. Accessories: Stonewear’s standard materials and accessories as required for planters as indicated on drawings.

C. Brackets and Anchors: Unexposed plates, angles and supports may be galvanized steel; separate dissimilar materials to prevent electrolytic action.

D. Fasteners: Type required for specific usage; provide concealed fasteners except where specifically approved.

A. Standard: Comply with PCI MNL-128 recommended practice for glass fiber reinforced concrete panels, including Appendix G, Polymer Modified Glass Fiber Reinforced Concrete Panels.

B. Units: Manufacture and cure units to ensure similarity of dimension and finish throughout, free from casting joint marks, grain, and obvious defects.

C. Inserts and Embedments: Embed into units in manner to develop full strength required for insert and embedment without weakening unit; maintain sufficient embedment for design requirements.

D. Fabrication Tolerances: Prefabricate site amenities within following maximum differences from dimensions indicated in Contract Documents;

1. Dimension: Plus of minus 1/8" in any direction, noncumulative.

2. Material Thickness: Plus 1/4" and minus 0".

3. Total Unit Thickness: Plus 1/4" and minus 1/8".

4. Insert Locations: Plus or minus 1/4".

A. Factory Quality Control Program: Stonewear shall maintain quality control program throughout fabrication of site amenities.

B. Standard: Conform with requirements of PCI MNL-117 for quality control.

C. Testing: Quality control program shall include twenty-four hour water test of all units with records maintained at place of manufacture.

A. Inspection: Check Project dimensions affecting installation; beginning of work signifies acceptance of conditions.

A. Placement: Install units in accordance with manufacturer's instructions, including methods for moving and placement provided by manufacturer.

A. Clean soiled units using methods recommended by unit manufacturer; use extreme care to prevent damage to unit surfaces and surrounding materials.

A. Protection: Repair or replace items damaged or marred during construction.

B. Patching:

1. Factory Finished Units: Mix and place patching mixtures to match color and texture of surrounding finish; replace units which cannot be acceptably patched.

a. Patch Acceptance: Patches noticeable from a distance of 5'-0" are not acceptable.