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Guide

Glass Deflection Calculator Guide

Glass deflection checks help engineers review serviceability, movement, appearance, drainage, and user comfort under service loads.

What Affects Deflection

Deflection depends on pane dimensions, glass thickness, support condition, load magnitude, glass build-up, and laminated glass assumptions.

SLS Review

Serviceability checks are normally reviewed separately from ULS stress checks because a pane can be strong enough but still too flexible for the project brief.

Support Conditions

Four-edge, two-edge, and one-edge support conditions can produce very different deflected shapes and governing spans.

Using VitraLab

Enter the pane size, build-up, support condition, and load values, then review the SLS deflection output and utilization ratio.