Glass railing
A guard infilled with tempered glass panels instead of balusters.
A glass railing fills a guardrail with panels of tempered or laminated safety glass instead of vertical balusters, for an unobstructed view and a sleek, open look on stairs, landings, and balconies. Because a solid panel has no openings, it automatically satisfies the 4 in (102 mm) sphere rule that governs baluster spacing, so there is no spindle layout to calculate. The panel sits in a continuous base shoe along the run or is held by standoff clamps, usually with a handrail on top. Example: a 36 in (914 mm) guard along a flight uses tempered panels cut to the stair angle, each thick enough — typically 12 mm — to carry the code load. Glass needs no spacing math but is heavy, costly, and shows every fingerprint.
Related terms
Stair calculators
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Written by the Stairs Calc editorial team. Methodology and code references: see our methodology.
Built and maintained by builders, drafters and engineers who plan stairs for a living — every code limit is transcribed from the published standard and cited to its exact section.
Last reviewed 2026-06-20 against IRC 2021/2024
Stairs Calc gives accurate geometry and checks it against published building-code limits, but results are estimates for planning. Codes are adopted and amended locally and change over time. Always confirm dimensions against your local adopted code and a licensed professional before you build.