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- SECTION 04720
-
- CAST STONE
- NOTE ** Continental Cast Stone Manufacturing, Inc.; precast
- components simulating natural stone.
- NOTE **
- NOTE ** Continental Cast Stone Manufacturing is located at
- the following address:
- NOTE ** 22001 West 83rd Street
- NOTE ** Shawnee, KS 66227
- NOTE ** Tel: (913) 422-7575
- NOTE ** Fax: (913) 422-7272
- NOTE ** email: info@continentalcaststone.com
- NOTE **
- NOTE ** Cast stone components are custom fabricated to each
- installation and allow the look, color, and texture
- of cut stone at lower cost.
- NOTE **
- NOTE ** SECTION 04720 - CAST STONE, Copyright 1997, The
- Architect's Catalog, Inc.
-
- PART 1 GENERAL
-
- 1.1 SECTION INCLUDES
- NOTE ** Delete items below not required for project. Add
- other items that may be required.
-
- A. Customized cast stone components for installation in
- masonry.
-
- B. Anchors and accessories.
-
- 1.2 RELATED SECTIONS
- NOTE ** Delete any sections below not relevant to this
- project; add others as required.
-
- A. Section 04065 - Mortar and Masonry Grout.
-
- B. Section 04810 - Unit Masonry Assemblies.
-
- C. Section 04820 - Reinforced Unit Masonry Assemblies.
-
- D. Section 07900 - Joint Sealers.
-
- 1.3 REFERENCES
- NOTE ** Delete references from the list below that are not
- actually required by the text of the edited
- section.
-
- A. ACI 318 - Building Code Requirements for Reinforced
- Concrete; American Concrete Institute.
-
- B. ASTM A 615/A 615M - Standard Specification for Deformed
- and Plain Billet-Steel Bars for Concrete Reinforcement.
-
- C. ASTM C 33 - Standard Specification for Concrete
- Aggregates.
-
- D. ASTM C 150 - Standard Specification for Portland Cement.
-
- E. ASTM C 270 - Standard Specification for Mortar for Unit
- Masonry.
-
- F. ASTM C 494 - Standard Specification for Chemical
- Admixtures for Concrete.
-
- G. ASTM C 642 - Standard Test Method for Specific Gravity,
- Absorption, and Voids in Hardened Concrete.
-
- H. ASTM C 979 - Standard Specification for Pigments for
- Integrally Colored Concrete.
-
- I. ASTM C 1194 - Standard Test Method for Compressive
- Strength of Architectural Cast Stone.
-
- J. ASTM C 1195 - Standard Test Method for Absorption of
- Architectural Cast Stone.
-
- K. ASTM D 2244 - Standard Test Method for Calculation of
- Color Differences From Instrumentally Measured Color
- Coordinates.
-
- L. Technical Manual; Cast Stone Institute.
-
- 1.4 SUBMITTALS
-
- A. Submit under provisions of Section 01300.
-
- B. Product Data: Test results of cast stone components made
- previously by the manufacturer.
-
- C. Shop Drawings: Include profiles, cross sections,
- reinforcement, exposed faces, arrangement of joints,
- anchoring methods, anchors, annotation of components, and
- their locations in project.
-
- D. Verification Samples: Pieces of actual cast stone
- components not less than 1 ft (305 mm) in length,
- illustrating range of color and texture to be anticipated
- in components furnished for the project.
-
- 1.5 QUALITY ASSURANCE
-
- A. Manufacturer Qualifications: A current producer member
- of the Cast Stone Institute, with a minimum of five years
- of experience in producing cast stone of the types
- required for this project.
- 1. Plant must have adequate capacity to furnish quality,
- sizes, and quantity of cast stone required without
- delaying progress of the Work.
- 2. Products previously produced by plant and exposed to
- weather must exhibit satisfactory appearance.
-
- B. Standards: Comply with requirements of current edition
- of Cast Stone Institute Technical Manual.
- NOTE ** Mock-ups are optional and will add expense to the
- project. Delete this article if mock-up is not
- required.
-
- C. Mock-Up: Provide full size cast stone components for
- installation in mock-up of exterior wall. Approved mock-
- up will become standard for appearance and workmanship.
- 1. Mock-up may remain as part of the completed Work.
- 2. Mock-up may not remain as part of the completed Work;
- at Architect's direction, demolish mock-up and remove
- debris from project site.
-
- 1.6 DELIVERY, STORAGE, AND HANDLING
-
- A. Delivery: Deliver cast stone components secured to
- shipping pallets and protected from damage and
- discoloration.
-
- B. Storage and Handling: Store cast stone components on
- project site to prevent contact with earth. Handle
- carefully to avoid chipping and cracking.
-
- PART 2 PRODUCTS
-
- 2.1 MANUFACTURERS
-
- A. Provide cast stone components fabricated by Continental
- Cast Stone Manufacturing, Inc.; Shawnee, Kansas 66227.
- ASD. Telephone 913-422-7575.
-
- B. Requests for substitutions will be considered in
- accordance with provisions of Section 01600.
- NOTE ** Delete paragraph above or below; coordinate with
- Division 1 requirements.
-
- C. Substitutions: Not permitted.
-
- 2.2 CAST STONE COMPONENTS
-
- A. Provide cast stone components with the following
- properties:
- 1. Compressive strength: 6500 psi (44.8 Mpa) minimum at
- 28 days, per ASTM C 1194.
- 2. Absorption: 6 percent maximum at 28 days, per ASTM C
- 1195 or ASTM C 642.
-
- B. Surface Texture: Fine grained, similar to natural stone.
- No bugholes or air voids are permitted.
-
- C. Color and Finish: Match sample on file at Architect's
- office.
- 1. Viewing conditions: Compare in direct daylight at 10
- feet (3 m), after subjecting to similar aging and
- weathering conditions.
- 2. Maximum variation: 2 percent hue and 6 percent
- lightness, chroma, and hue combined; test in
- accordance with ASTM D 2244.
-
- 2.3 MATERIALS
-
- A. Portland Cement: ASTM C 150, Type I or Type III, white
- or gray as required to match Architect's sample.
-
- B. Coarse Aggregate: ASTM C 33, except for gradation;
- granite, quartz, or limestone.
-
- C. Fine Aggregate: ASTM C 33, except for gradation; natural
- or manufactured sands.
-
- D. Pigments: ASTM C 979, inorganic iron oxides.
-
- E. Admixtures: ASTM C 494.
-
- F. Water: Potable.
-
- G. Reinforcing Bars: ASTM A 615/A 615M, galvanized or epoxy
- coated when covered by less than 1-1/2 inch (38 mm) of
- cast stone material.
-
- 2.4 ACCESSORY PRODUCTS
-
- A. Anchors: Non-corrosive type, sized for conditions.
- Provide of brass, hot-dip galvanized steel, or Type 304
- stainless steel.
-
- B. Mortar: ASTM C 270, Type N.
- NOTE ** Delete paragraph above or below.
-
- C. Mortar: As specified in Section 04065.
-
- D. Sealant: As specified in Section 07900.
-
- 2.5 FABRICATION
-
- A. Shapes: Unless otherwise indicated on drawings, provide:
- 1. suitable wash on exterior sills, copings, projecting
- courses, and components with exposed top surfaces.
- 2. drips on projecting components.
-
- B. Reinforcement: Provide reinforcement as required to
- withstand handling and structural stresses.
- 1. Comply with ACI 318.
- 2. Provide reinforcement of not less than 1/4 of one
- percent of cross section area.
-
- C. Curing and Finishing:
- 1. Cure components with a direct fired steam generator
- at a minimum temperature of 105 degrees F (41 degrees
- C) for a minimum of 6 hours, within 12 hours of
- fabrication.
- 2. Cure components in the presence of carbon monoxide
- and carbon dioxide to promote carbonation at the
- surface, for efflorescence control.
- 3. Remove cement film from exposed surfaces prior to
- packaging for shipment.
-
- D. Tolerances: Fabricate cast stone components within the
- following tolerances:
- 1. Plus or minus 1/8 inch in all dimensions.
- 2. Maximum bow, camber, or twist: length/360.
-
- E. Testing: Test compressive strength and absorption of
- specimens selected at random from plant production.
- 1. Test in accordance with referenced testing standards.
- 2. Select samples at rate of three per 500 cubic feet,
- but not less than three.
-
- PART 3 EXECUTION
-
- 3.1 INSTALLATION
-
- A. General: Install cast stone components in conjunction
- with masonry, complying with requirements of Section
- 04810.
-
- B. Setting:
- 1. Drench cast stone components with clear, running
- water immediately prior to installation.
- 2. Fill dowel holes and anchor slots completely with
- mortar or non-shrink grout.
- 3. Set cast stone components in a full bed of mortar
- unless otherwise detailed.
- 4. Fill vertical joints with mortar.
- 5. Make all joints 3/8 inch (9.5 mm), except as
- otherwise detailed.
- 6. Leave head joints in copings and similar components
- open for sealant.
- 7. Rake mortar joints 3/4 inch (19 mm) for pointing.
- Sponge the face of each stone to remove excess
- mortar.
- 8. Tuck point joints to a slight concave profile.
-
- C. Sealant Joints:
- 1. Comply with requirements of Section 07900.
- 2. Prime the ends of cast stone components, insert
- properly sized foam backing rod, and install sealant
- using sealant gun.
- 3. Provide sealant joints at the following locations and
- as otherwise detailed:
- a. Cast stone components with exposed tops.
- b. Joints under relieving angles.
- c. At control and expansion joints.
-
- 3.2 TOLERANCES
-
- A. Comply with requirements of Cast Stone Institute
- Technical Manual.
-
- B. Set cast stone components within 1/8 inch (3.2 mm) of
- plane of adjacent component.
-
- C. Make joints consistent within tolerance of plus 1/16 inch
- (1.6 mm) and minus 1/8 inch (3.2 mm).
-
- 3.3 ADJUSTING, CLEANING, AND PROTECTION
-
- A. Repair obvious chips with matching touchup material
- provided by the manufacturer.
-
- B. Clean cast stone components by wetting with clear running
- water.
-
- C. Apply a solution of Sure Clean 600 by ProSoCo Products,
- Inc. or equivalent, complying with manufacturer's
- instructions.
-
- D. Protect cast stone components from splashing and from
- damage by other operations at the project site.
-
-
- END OF SECTION
-