SIST EN 1863-1:2012/oprA1:2015

Overview

Standard reference: EN 1863-1:2011/prA1
Title: Glass in building - Heat strengthened soda lime silicate glass - Part 1: Definition and description
Status: Draft amendment submitted to CEN enquiry (modifies EN 1863-1:2011).
This amendment from CEN/TC 129 updates definitions and test/marking requirements for heat strengthened soda lime silicate glass used in buildings. It clarifies how this category of glass is described, how some tests are performed, and what marking information is required.

Key topics and technical changes

• Scope and status
  • This document is a draft amendment; it is distributed for review and comment and is not (yet) a final European Standard.
• Edgework and laminated safety glass (modification to Clause 7.1)
  • Clarifies that when heat strengthened glass is incorporated into laminated safety glass and the manufacturer performs edgework on the laminated unit, the heat strengthened glass remains covered by the standard provided the manufacturer has internal evidence that its properties (notably mechanical strength) remain in conformity.
• Limitations on hole positions (modification to Clause 7.4.3)
  • A previous sentence limiting recommendations to panes with a maximum of four holes has been deleted, removing that particular numerical limitation from the guidance.
• Test procedure updates (modification to Clause 8.3)
  • The impact test point for a pointed steel tool is specified at 20 mm in from the longest edge at the midpoint (replacing the previous 13 mm figure). Several paragraphs and the associated figure in the original clause are deleted/updated.
• Marking requirements (modification to Clause 10)
  • The marking requirement is revised: the standard now states “The marking shall give the following information:”, removing the explicit requirement that the marking be visible after installation.

Practical applications

• Use this standard when specifying or manufacturing heat strengthened soda lime silicate glass for façades, windows, balustrades, doors and other architectural applications where enhanced strength but not full tempering is required.
• Guides testing laboratories on impact-test placement and informs quality assurance for manufacturers integrating heat strengthened glass into laminated safety glass.
• Useful for product documentation, conformity assessment, and factory production control.

Who should use this standard

• Glass manufacturers and laminators
• Product designers, façade engineers and architects
• Testing laboratories and certification/inspection bodies
• Specifiers, procurement teams and building regulators

Related standards

• This amendment sits within the broader family of European glass standards for safety glass, laminated glass and testing protocols. Consult other EN standards on glass in building for complementary requirements and testing methods.