When installing a frameless glass balustrade or pool fence, one of the most frequently asked questions is how many spigots per glass panel are required? The proper number and location of spigots (also known as glass clamps or standoffs) is critical for safety, code compliance, and aesthetics.
This article will explain how many spigots are required per panel, the elements that influence spacing, and advice for a secure and visually appealing installation.
What are Spigots?
Spigots are small vertical support components that hold glass panels in place. They are often used in frameless balustrade and fencing systems. Typically made of stainless steel or aluminium, they can be core-drilled into concrete or base-plated for surface mounting.
They provide a basic and elegant appearance while sustaining the entire weight of the glass panel, eliminating the need for heavy frames.
Standard Rule: Two Spigots per Glass Panel
In most residential installations, the standard is two spigots per glass panel. This includes glass panels up to 1200mm wide and 12mm thick, which is a common requirement for frameless glass installations in staircases, balconies, and pool fencing.
As a general rule, one panel can support two spigots (if it meets conventional size and weight requirements).
Factors That Influence the Number of Spigots Needed
Although two spigots per panel are common, several significant factors may increase or change the number required:
1. Panel dimensions and thickness
Panels wider than 1300mm may need an extra central spigot to prevent deflection or bowing.
Thicker glass (15mm or more) is heavier and may necessitate additional support or closer spacing.
2. Wind load and environmental conditions
High-wind zones or elevated installations (e.g., coastal locations or high-rise balconies) may necessitate closer spacing or more spigots for added support.
3. Mounting surface
A weak or uneven basis (such as timber decking) may be unable to hold broad panels with only two spigots.
Standard spacing is frequently better supported on concrete or steel bases.
4. Local Building Codes
Always consult the local construction codes or an engineer. South African and Australian standards, for example, frequently include stringent requirements for fall protection or pool safety fence.
Spigot Spacing Guidelines
To retain both strength and symmetry, use these common spacing practices:
- Glass panel width and recommended number of spigots. Spacing (approx.
- Up to 1000 mm 2. 100mm-150mm from each edge.
- 1200mm-1500mm 3 (optional centre spigot). Equal spacing across the panel.
- Over 1500mm: Not suitable for frameless. Use two tiny panels.
Spigots should be placed no more than 150mm from either edge of the panel to ensure even support.
Can You Use More than Two Spigots?
Yes, you can. For increased safety or to meet specific engineering criteria, you may choose to add a third (or even fourth) spigot, notably:
- Commercial or public places
- Glass exceeding a specific thickness or weight
- Areas susceptible to high impact or vibration
However, excessive usage of spigots can detract from the clean appearance of frameless glass and increase installation costs.
DIY vs. Professional Installation
While some homeowners prefer to install their own spigots and panels, professional installation is usually suggested. Misaligned spigots, poor spacing, or bad installation might result in:
- Cracked glass
- Structural instability
- Failed inspections
A qualified installer will assure compliance with local legislation, optimal assistance, and long-term results.
Frequently Asked Questions (FAQs): Spigots and Glass Panels
Can I use just one spigot per panel?
No. Even small panels will require more than one spigot to give proper support and stability. Two is the absolute minimum.
Do thicker glass panels require additional spigots?
Not necessarily, but thicker panels are heavier and may necessitate closer spacing or strengthened mounts depending on the base material.
What happens if I place spigots too far apart?
This can cause stretching in the glass, resulting in stress fractures, impaired structural integrity, or panel failure.
Can I combine spigot styles (core-drilled and base-plated)?
Mixing is not suggested. Consistency in mounting type promotes equal weight distribution and structural uniformity.
Are spigots equipped with rubber gaskets or padding?
Yes. Quality spigots have rubber inserts to avoid glass-to-metal contact, lowering the danger of breakage or vibration.
Final Thoughts
Choosing the appropriate number of spigots per glass panel is critical to a safe, compliant, and visually appealing frameless glass installation. While two spigots per panel is the basic norm for most residential applications, always consider size, location, and local requirements before proceeding.
For large or complex projects, contact with a structural engineer or glass installation specialist to ensure that your arrangement meets both safety and aesthetic requirements.
Contact EZRails for more information.
See also:
Spigots: Everything You Need to Know
