Glass Balustrade Design

Review of loading codes, standards and design guidance

Overview

Abstract

Glass handrail design in the United States lags behind best practice in other parts of the world. There can be as much as a factor of four (4) difference between the design loads in USA and much of the world and they lack requirements for residual capacity. With this in mind, this paper reviews international design practices with a discussion of their basis and the implications for design of balustrades in brittle materials. Improvements are possible for the design load, residual capacity and damage-event loading, each of which could be based on occupancy. Alternate configurations for improved robustness at similar size and cost are presented.


Authors

Photo of Richard Green, PE, SE, P.Eng, CPEng IntPE(Aust), APEC Engineer

Richard Green, PE, SE, P.Eng, CPEng IntPE(Aust), APEC Engineer

Principal/Owner

Green Facades LLC

richard@greenfacadesllc.com

Photo of Andrew Crosby, PEng

Andrew Crosby, PEng

Principal

Read Jones Christoffersen Ltd.

acrosby@rjc.ca

Photo of Terrence McDonnell S.E., P.E., P.Eng., SECB

Terrence McDonnell S.E., P.E., P.Eng., SECB

Associate Principal

Klein & Hoffman

trmcdonnell@kleinandhoffman.com


Keywords

Paper content

1. Design Loads for Balustrades

In the United States glass balustrades are governed by IBC9, ASCE 73 and ASTM E23585, with ASTM E23534, (although the ASTM standards are notable in

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Footnotes

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Acknowledgements

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Rights and Permissions

AS1170.0 - Australian Standard: Structural design actions

Part 0: General principles

Part 1: Permanent, imposed and other actions

AS1288 – Australian Standard: Glass in buildings—Selection and installation, Standards Australia

CEN/TS 19100:2021 "Design of glass structures"

EN1991.1 Eurocode 1: Actions on structures - Part 1-1: General actions -Densities, self-weight, imposed loads for buildings

EN16612 Glass in building - Determination of the lateral load resistance of glass panes by calculation

ASCE7 (ASCE/SEI 7) Minimum Design Loads and Associated Criteria for Buildings and Other Structures (American Society of Civil Engineers

Structural Glass Design Manual (Public draft 2024) Green R, Crosby A, McDonnell T www.structglass.org

A Tale of Three Cities – and Lots of Broken Glass – Megan Headley US Glass, Metal and Glazing October 2011

Balustrade Design Loads: Failures, Fatalities, Research and Global Design Practices Green R., Crosby A., McDonnell T. Facade Techtonics World Congress 2024

Fundamentals of Spontaneous Breakage Mechanism Caused by Nickel Sulfide - Dr. Andreas Kasper Glass Processing Days 2003

Factors That Influence Spontaneous Failure in Thermally Treated Glass – Nickel Sulphide - Dr Leon Jacob Glass Processing Days 1997

NiS in HS Glass - Dr. Andreas Kasper; John Colvin; Frank Rubbert; Francis Serruys https://www.saint-gobain-glass.com/nis-in-heat-strengthened-glass

Design of glass balustrades to CEN/TS 19100Chris O’Reagan and Peter Lenk, The Structural Engineer January 2024.

A simplified approach to the dynamic effective thickness of laminated glass for ships and passenger yachts Vergassola and Boote, International Journal on Interactive Design and Manufacturing DOI: 10.1007/s12008-019-00614-2

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Author Comments

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