ASTM C1464-21 PDF

Overview

ASTM C1464-21: Standard Specification for Bent Glass establishes recognized requirements for bent glass products used in general building construction, furniture, display, and a broad range of non-automotive applications. Developed by ASTM International, this standard covers terminology, material classification, fabrication requirements, tolerances, and test methods relevant to the production and quality assurance of bent glass. It ensures that bent glass used for architectural and design purposes meets consistent quality and safety standards.

Key Topics

• Scope: The specification applies to bent glass in architectural, furniture, and display settings, but excludes automotive uses.
• Glass Types: Defines multiple categories, including:
  • Annealed bent glass
  • Chemically strengthened bent glass
  • Fully tempered bent glass
  • Heat-strengthened bent glass
  • Laminated bent glass
  • Miscellaneous combinations
• Fabrication: All finishing processes, such as cutting and drilling, must occur before any chemical or thermal strengthening.
• Tolerances: Dimensional tolerances for height, girth, shape accuracy, cross-bend, and twist are provided to ensure precise manufacturing and fit.
• Visual and Physical Inspection: Includes requirements for maximum allowable blemishes, visual inspection distances, and specific evaluation criteria.
• Safety Glazing: Guidelines for impact testing and marking to comply with federal, ANSI, and building code safety regulations.
• Optical Quality: Discussion of surface distortion and anisotropy inherent to certain strengthening processes.

Applications

ASTM C1464-21 is crucial for architects, glass fabricators, contractors, and manufacturers specifying bent glass in building and interior environments. Its applications include:

• Building Construction: Curved glass walls, atriums, stairs, canopies, and balustrades.
• Furniture: Custom glass tables, cabinetry, or shelving featuring bent glass.
• Displays: Retail showcases, exhibit installations, and artistic architectural features.
• Non-Automotive Safety Glazing: Where impact resistance or compliance with safety glazing standards is required.
• Interior Design: Partitions, railing infill, and unique decorative installations making use of complex glass shapes.

In all cases, users should coordinate with fabricators to confirm feasibility, particularly for unusual or customized bend configurations.

Related Standards

ASTM C1464-21 references a set of related standards to clarify terminology and ensure compatibility with various glass processing and safety requirements:

• ASTM C162: Terminology of Glass and Glass Products
• ASTM C1036: Specification for Flat Glass
• ASTM C1048: Specification for Heat-Strengthened and Fully Tempered Flat Glass
• ASTM C1172: Specification for Laminated Architectural Flat Glass
• ASTM C1376: Specification for Coatings on Flat Glass
• ASTM C1422/C1422M: Specification for Chemically Strengthened Flat Glass
• ANSI Z97.1: Safety Glazing Materials Used in Buildings
• CPSC 16 CFR 1201: U.S. Federal Safety Standard for Architectural Glazing

Consult the current editions for the latest requirements and best practices to ensure compliance across the supply chain.

Keywords: ASTM C1464-21, bent glass, curved glass, architectural glass, safety glazing, laminated glass, tempered glass, glass tolerances, building glass standards, glass fabrication, non-automotive glass.