Base glass clamp

The Strofix base glass clamp (side round) is an AISI 304 stainless-steel side-mounted spigot with a Ø42.4 mm round profile, designed to hold 12–17.52 mm glass panels vertically in frameless glass railing and balustrade systems. Overall height is 325 mm. Supplied in satin finish.

The side-mount base glass clamp is attached to a wall, fascia, or structural edge rather than to the floor. The 325 mm height provides a substantial clamping length alongside the glass panel for structural stability. The Ø42.4 mm round body matches the standard railing tube diameter used across the Strofix product range, giving the clamp a consistent visual profile with Ø42.4 mm tube-based railing systems. The 12–17.52 mm glass thickness range covers standard toughened glass and common laminated safety glass buildups. AISI 304 stainless steel is suitable for standard interior and exterior installations.

This is the side-mount, round-profile variant. Side-mount clamps are used where floor mounting is not possible or where the glass panel is secured to the edge of a balcony slab, wall, or structural beam. The Strofix Spigot System range also includes a side-mount square variant (40 × 40 mm) and bottom-mount variants for floor-anchored installations.

Use cases:

• Wall-mounted frameless glass balustrades on balconies and terraces
• Fascia-mounted glass railings on the edge of concrete slabs or steel beams
• Staircase glass balustrades mounted to the stringer or wall side
• Railing systems combining frameless glass panels with Ø42.4 mm tube handrails
• Retrofit glass railings where floor anchoring is not feasible
• Commercial building exterior glass barriers mounted to structural edges

FAQ:

What glass thickness does this clamp accept?

The base glass clamp accepts glass panels from 12 to 17.52 mm thick. This range covers standard toughened glass and common laminated safety glass buildups used in glass balustrade systems.

What does "side" mounting mean?

Side mounting means the clamp is attached to a wall, fascia, slab edge, or structural beam — not to the floor surface. This is the key difference from "bottom" variants, which are floor-anchored. Side mounting is used when floor anchoring is not possible or when the glass is secured to the edge of a structural element.

Why is the body diameter Ø42.4 mm?

The Ø42.4 mm diameter matches the standard railing tube size used across the Strofix product range. This provides visual consistency when the side-mount glass clamp is used alongside Ø42.4 mm tube handrails and other round-profile railing components.

How does this differ from the side-mount square variant?

Both the side-round and side-square base glass clamps have the same 325 mm height and accept the same 12–17.52 mm glass range. The difference is the body profile: this product has a Ø42.4 mm round cylindrical profile, while the square variant has a 40 × 40 mm angular profile. Choose based on the desired aesthetic and whether the installation uses round or square railing components.

What is the overall height of the clamp?

The clamp has an overall height of 325 mm (H = 325 mm), the same as the side-mount square variant. The greater height compared to the 182 mm bottom-mount variants provides a longer clamping zone for structural stability from lateral attachment.

What steel grade and finish is used?

The clamp is manufactured from AISI 304 stainless steel with a satin finish. AISI 304 is suitable for standard interior and exterior installations.

About Spigot Systems

A spigot system is a base-mounted glass clamp that grips a glass panel along its bottom or side edge, anchoring the panel directly to a floor, deck or fascia without the need for vertical posts.

The result is a frameless glass balustrade where the glass itself forms the barrier and no intermediate posts interrupt the sightline.

Each spigot clamp consists of a solid base that bolts to the substrate and a clamping channel that holds the glass securely with internal pressure.

Strofix supplies base glass clamps in four configurations: bottom-mount round (Ø48 mm), bottom-mount square (50×50 mm), side-mount square (40×40 mm) and side-mount round (Ø42.4 mm) — all in AISI 304 stainless steel, with satin or matte black finishes.

The correct spigot depends on mounting orientation (bottom or side), base profile (round or square) and the desired finish.