03_11_00_Concrete_Forms_and_Accessories.pdf
PDF 113 KB Posted
- Solicitation number
- 25/26-0019
- Issued by
- San Bernardino County, California
About this file
This is a technical specification document for concrete forms and accessories prepared by Fontana Unified School District, establishing standards for formwork used in cast-in-place concrete construction projects. The specification covers formwork materials, embedded items such as anchor bolts and inserts, and related accessories required for the district's construction projects. The document references industry standards including ACI 318 and ACI 347, American Plywood Association guidelines, and California Building Code requirements. Key products specified include construction-grade form lumber, exterior-grade plywood (minimum 3/4 inch thick for exposed locations and 5/8 inch for unexposed), tube forms, coated form plywood with release agents, glass-fiber-reinforced plastic forms, steel forms, and form ties that do not leave metal within 1-1/2 inches of the concrete surface. Specific brand recommendations are provided for form coatings (Formshield, Release, or Cast-Off), form liners (L.M. Scofield, Symons, or Greenstreak), and void forms (SureVoid Products). The specification establishes stringent quality standards for exposed concrete finishes, including Class A through Class D surface tolerances ranging from 1/8 inch to 1 inch irregularities measured within 5 feet.
The execution section establishes detailed requirements for form installation, removal timelines, and concrete curing protocols. Forms for columns and walls cannot be removed until a minimum of 5 days after placement, floor slabs require 7 days, and beams and girders require 15 days minimum. Formwork must maintain proper alignment with horizontal joints level and vertical joints plumb, chamfer strips of 3/4 inch by 3/4 inch must be provided for all exposed concrete corners, and reused formwork must be thoroughly cleaned and oiled before reinstallation. Submittals require detailed structural calculations and drawings signed by California-registered civil engineers for falsework exceeding 14 feet in height or 16-foot horizontal spans, with copies maintained at the jobsite. The specification mandates compliance with California Construction Safety Orders and CBC Chapter 19A, and requires testing of field-cured concrete specimens to determine when forms and shoring can be safely removed based on compressive strength verification.
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Fontana Unified School District CONCRETE FORMS and ACCESSORIES
03 11 00
Revised: 01/07/22 Page 1 of 5
Concrete Forms & Accessories
03 11 00
PART 1 - GENERAL
1.01 SUMMARY
A. Provisions of Division 01 apply to this section
B. Section Includes:
1. Formwork for cast-in-place concrete as indicated.
2. Installation of items to be embedded in concrete, such as anchor bolts, inserts, embeds, and sleeves.
C. Related Sections:
1. Section 03 20 00: Concrete Reinforcement.
2. Section 03 30 00: Cast-In-Place Concrete.
1.02 REFERENCES
A. American Concrete Institute (ACI) Publication:
1. ACI 318 – Building Code Requirements for Structural Concrete, Chapter 6, Formwork, Embedded Pipes, and Construction Joints.
2. ACI 347 – Guide to Formwork for Concrete.
B. American Plywood Association (APA):
1. Form No. V345 - Concrete Forming Design/Construction Guide.
C. National Institute of Standards and Technology (NIST):
1. NIST Voluntary Product Standard PS 1.
1.03 SUBMITTALS
A. Submit detailed structural calculations and drawings approved and signed by a California registered Civil Engineer where the height of the falsework or vertical shoring, as measured from the top of the sills to the soffit of the superstructure exceeds 14 feet, or where individual horizontal span lengths exceed 16 feet, or where provision for vehicular traffic through falsework or shoring occurs. For all other falsework and shoring submit layout signed by California registered Civil Engineer, manufacturer’s authorized representative or a licensed contractor experienced in the usage and erection of falsework and vertical shoring.
A copy of the plans and calculation shall be available at the jobsite at all times.
B. Shop Drawings: Submit Shop Drawings indicating locations of forms, construction and expansion joints, embedded items, and accessories.
C. Product Data: Submit manufacturer's Product Data for form materials and accessories.
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Concrete Forms & Accessories
03 11 00
1.04 REGULATORY REQUIREMENTS
A. California Building Code (CBC), Chapter 19A.
B. California Code of Regulations, Title 8, Division 1, Chapter 4, Subchapter 4, Construction Safety Orders, Article 6, Excavations, Sections 1713 and 1717.
1.05 DELIVERY, STORAGE AND HANDLING
A. Storage shall prevent damage and permit access to materials for inspection and identification.
PART 2 - PRODUCTS
2.01 GENERAL
A. Form materials may be reused during progress of the Work provided they are completely cleaned and reconditioned, recoated for each use, capable of producing formwork of required quality, and are structurally sound.
B. Form Lumber: WCLIB Construction Grade or Better, WWPA No. 1 or Better.
C. Plywood: NIST Voluntary Product Standard PS 1, Group 1, Exterior Grade
B-B Plyform or better, minimum 5-ply and 3/4 inch thick for exposed locations and at least 5/8 inch thick for unexposed locations, grade marked, not mill oiled. Furnished plywood with medium or high density overlay is permitted.
D. Coated Form Plywood: For exposed painted concrete, plastic overlaid plywood of grade specified above, factory coated with a form coating and release agent Nox-crete", or equal.
E. Tube Forms: Sonoco "Seamless Sonotubes,” or equal, of the type leaving no marks in concrete, one-piece lengths for required heights.
F. Joist Forms: Code recognized steel or molded plastic types as required.
G. Special Forms: For exposed integrally-colored concrete, plywood as above with high density overlay, plywood with integral structural hardboard facing or fibrous glass reinforced plastic facing, providing specified finish.
H. For Exposed Concrete Finish:
1. Plywood: New, waterproof, synthetic resin bonded, exterior type
Douglas fir or Southern pine plywood manufactured especially for concrete formwork and conforming to NIST Voluntary Product
Standard PS 1, Grade B-B grade, Class I.
2. Glass-Fiber-Fabric Reinforced Plastic Forms: Matched, tight fitting, stiffened to support weight of concrete without deflection detrimental to structural tolerances and appearance of finished concrete surfaces.
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Concrete Forms & Accessories
03 11 00
3. Steel: Minimum 16 gage sheet, well matched, tight fitting, stiffened to support weight of concrete, without deflection detrimental to tolerances and appearances of finished concrete surfaces.
4. Plywood: "Finland Form or "Combi Form" distributed by North
American Plywood Corporation. The material shall be furnished with hard smooth birch face veneers with phenolic resin thermally fused onto panel sides. Edges shall be factory sealed.
I. Form Ties: Prefabricated rod, flat band, wire, internally threaded disconnecting type, not leaving metal within 1-1/2 inch of concrete surface.
J. Form Coating: Non-staining clear coating free from oil, silicone, wax, not grain-raising, "Formshield" by A.C. Horn, Inc., "Release" by Edoco/Dayton
Superior, or "Cast-Off" by Sonneborn/BASF Building Systems. Where form liners are furnished, provide form coatings recommended by form liner manufacturer.
K. Form Liner: Rigid or resilient type by L.M. Scofield, Symons, or Greenstreak.
L. Void Forms: Manufactured by SureVoid Products, Inc., or equal. Forms shall be "WallVoid" for temporary support of concrete walls and grade beams spanning between supports, and "SlabVoid" for creating gaps between concrete slabs or steps and underlying soils. Void forms shall be fabricated of corrugated paper with moisture resistant exterior, and shall be capable of withstanding working load of 1,500 psf. Provide accessories as required.
PART 3 - EXECUTION
3.01 GENERAL
A. Forms shall be constructed so as to shape final concrete structure conforming to shape, lines and dimensions of members required by
Drawings and Specifications, and shall be sufficiently tight to prevent leakage of mortar. They shall be properly braced or tied together to maintain position and shape. Forms and their supports shall be designed so that previously placed structures will not be damaged.
3.02 TOLERANCES
A. Permitted abrupt or gradual irregularities in formed surfaces as measured within a 5 feet length with a straightedge shall per ACI 347, Table 3.1:
Class of Surface
A B C D
1/8 inch 1/4 inch 1/2 inch 1 inch
Note To Specifier: Edit tolerances indicated below for project specifics.
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Concrete Forms & Accessories
03 11 00
1. Class A: Use for concrete surfaces prominently exposed to public view.
2. Class B: Use for coarse-textured concrete-formed surfaces intended to receive plaster, stucco or wainscoting.
3. Class C: Use as a general standard for permanently exposed surfaces where other finishes are not specified.
4. Class D: Use for surfaces where roughness is not objectionable and will be permanently concealed.
3.03 ERECTION
A. Plywood shall be installed with horizontal joints level, vertical joints plumb and with joints tight. Back joints by studs or solid blocking, and fill where necessary for smoothness. Reused plywood shall be thoroughly cleaned, damaged edges or surfaces repaired and both sides and edges oiled with colorless form oil. Nail plywood along edges, and to intermediate supports, with common wire nails spaced as necessary to maintain alignment and prevent warping.
B. Openings for Cleaning: Provide temporary openings at points in formwork to facilitate cleaning and inspection. At base of walls and wide piers, bottom form board on one face for entire length shall be omitted until form has been cleaned and inspected.
C. Chamfers: Provide 3/4 inch by 3/4 inch chamfer strips for all exposed concrete corners and edges unless otherwise indicated.
D. Reglets and Rebates: As specified in Section 03 30 00: Cast-In-Place
Concrete.
3.04 REMOVAL OF FORMS
A. Forms shall not be removed until concrete has sufficiently hydrated to maintain its integrity and not be damaged by form removal operations.
Unless noted otherwise and/or permitted by the Architect, columns and wall forms shall not be removed in less than 5 days, floor slabs in less than 7 days, beams and girders in less than 15 days, pan forms for joists may be removed after 3 days, but joist centering shall not be removed until after
15 days, and ramp, landing, steps and floor slabs shall not be removed in less than 7 days. Shoring shall not be removed until member has acquired sufficient strength to support its weight, load upon it, and added load of construction.
B. Compressive strength of in-place concrete shall be determined by testing field-cured specimens representative of concrete location or members, as specified in Section 03 30 00: Cast-In-Place Concrete.
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Concrete Forms & Accessories
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3.04 PROTECTION
A. Protect the Work of this section until Substantial Completion.
3.05 CLEAN UP
A. Remove rubbish, debris and waste materials and legally dispose of off the
Project site.
END OF SECTION
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