The American Society of Testing Materials (ASTM) International has published the revised edition of ASTMC1036Standard Specification for Flat Glass, developed by subcommittee C14.08. The revisions came as part of the document’s five-year review cycle. This specification covers the requirements for annealed, monolithic flat soda-lime glass supplied as cut sizes or stock sheets.

According to Steve Thomas with Guardian Glass, who served as the ASTM C1036 technical chair, along with the standard specification’s periodic review cycle, the updates included a range of minor clarifications. These include:

  • Clarification of the publication’s scope of coverage
  • Improvement of the content regarding chips
  • Inclusion of a lighting intensity limit amidst blemish examination
  • Introduction of a glass flatness requirement, keyed to a new non-mandatory appendix on available measurement techniques.

According to ASTM, C1036 “covers the quality requirements of flat, transparent, clear, and tinted glass … intended to be used primarily for architectural glazing products including: coated glass, insulating glass units, laminated glass, mirrors, spandrel glass or similar uses.”

Additional information is available through the ASTM website.