Revised EN 16613: Overview of Changes and Impact on Glass Design

Overview of Changes and Impact on Glass Design

Abstract

EN 16613 Determination of interlayer viscoelastic properties was first published in 2019 as a complementary standard to EN 16612 Determination of the lateral load resistance of glass panes by calculation. Both standards were prepared by CEN TC129/WG8 Mechanical Strength. At the same time, work on the future Eurocode EN 19100 Design of Glass Structures was progressing in TC250/SC11/WG1. Like EN 16612, this standard series requires reliable interlayer modulus properties for structural design of laminated glass. This working group expressed concerns over the basic measurement methodology and data processing in the determination of modulus values of interlayers to EN 16613. Therefore, it was decided to revise EN 16613 relatively shortly after its publication. The revision was executed under the umbrella of TC129/WG3 Laminated Glass, where more of the required expertise was available. This resulted in publication of a revised EN 16613 in 2025. This revised standard is intended to serve as a basis for interlayer modulus properties in the EN 19100 series. This paper describes the background of the key improvements in EN 16613 between 2019 and 2025, as well as the impact on reliable glass design.