Glass Balustrade Fixing: Base Shoe vs Spigot Systems

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A base shoe system clamps the glass panel along its bottom edge with a continuous channel fixed to the floor or slab edge, while a spigot system fixes each glass panel at points with round pins set into the floor or fascia. Base shoes give a continuous, robust edge and suit wide spans, whereas spigots give a nearly invisible, minimal look but depend heavily on precise setting out and substrate strength.

What a Base Shoe System Is

A base shoe is a continuous channel, usually in stainless steel or aluminum, that runs along the bottom of the glass. The glass sits inside the channel and is held by a gasket, resin or a structural adhesive, and the shoe is fixed to the floor, step or slab edge with anchors.

Because the load is spread along the full length of the glass, the system is forgiving of small variations in the floor. It also gives a clear, continuous line that many designers find clean and modern.

What a Spigot System Is

A spigot system uses short round pins, called spigots, that are fixed into the base and pass into bores drilled in the bottom of each glass panel. Each panel is supported at a few points rather than along its full edge.

The result is very little visible hardware, which suits frameless, open interiors and terraces where the view should stay uninterrupted. The trade-off is that the point loads are concentrated, so the glass and substrate must be designed for them.

Visual Impact and Design Intent

Choose base shoe when you want a defined horizontal line and a solid, architectural presence. The channel can be finished in a color or material that echoes other metalwork in the building.

Base shoe: visible continuous line, strong shadow detail, easy to align.
Spigot: almost invisible base, maximum transparency, minimal visual interruption.

Consider how the balustrade will look from inside and outside, and whether the base line should read as a feature or disappear.

Structural and Substrate Considerations

Confirm the substrate before choosing. A base shoe needs a continuous, level edge where anchors can be set reliably. Spigots need solid, correctly located concrete or steel where bores and fixings can take concentrated loads.

Panel thickness, glass type, span and handrail requirements all influence the decision. The Israeli railing standard SI 1142 sets the general framework, and exact values such as load and deflection should be verified with the structural engineer for each project.

Installation, Tolerances and Maintenance

Base shoe installation is generally more forgiving of small floor irregularities, since the channel can be packed and adjusted before the glass is set. Spigot installation demands accurate setting out, because bores in the glass must align with pins in the base. Errors are hard to correct once glass is cut.

Maintenance differs too. Base shoe channels collect dirt along the bottom, so they need regular cleaning. Spigot bases are easier to keep clean but require periodic checks that pins and fixings remain tight.

How to Choose Between Them

Start with the project brief: the look you want, the substrate, the expected use and the budget for both fabrication and site work. Ask the metalworker to review your drawings early, since they can flag clashes with floor finishes, drainage and waterproofing.

Choose base shoe for robust, continuous edges, uneven or retrofit floors, and public or high-traffic areas.
Choose spigot for frameless, minimal designs on sound, well-planned substrates.

Frequently asked questions

Is a spigot system less safe than a base shoe?

Not necessarily. Both can meet the required performance when designed and installed correctly. The safe choice depends on the glass specification, substrate strength and engineering check for the specific project.

Can I retrofit a base shoe onto an existing floor?

Often yes, since the channel can be fixed to an existing edge or step. The condition and thickness of the substrate must be checked on site before committing to a design.

Which system is easier to align on site?

Base shoe is generally more forgiving because the channel can be adjusted before the glass goes in. Spigot systems need very accurate setting out to match the bores in the glass.

Do I need an engineer for either system?

Yes. A structural engineer should confirm loads, fixings and glass specification for any balustrade, whichever fixing method you choose.

Common mistakes to avoid

Choosing the fixing method before checking the substrate, or leaving setting out too late, often causes costly changes. Involve the metalworker and engineer at the drawing stage, not after the floor is finished.

Our recommendation

For public or uneven spaces, a base shoe is usually the safer and more forgiving choice; reserve spigots for well-controlled interiors on solid substrates. Always confirm the final detail with a structural engineer.

Summary

Base shoes give a continuous, forgiving edge, while spigots give a nearly invisible, point-fixed look that demands precise setting out. Match the choice to the substrate, design intent and site conditions.

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