Why does it depend on system type?

Different attachments transfer load differently. Spigots cantilever load up through the glass. Standoffs distribute load differently. Top-rails use the rail itself as a structural member.

Typical spigot spacing?

4.5 to 5 feet between pairs for 4-foot-tall panels in 1/2" tempered. Two spigots per panel is standard.

Typical standoff spacing?

24 to 36 inches between standoffs on a single panel. The standoff group acts as a single rigid mount.

Typical top-rail spacing?

6 to 8 feet between posts. The continuous top rail bears load and caps the glass.

What’s the Right Post Spacing for a Glass Railing?

Post spacing on a glass railing is driven by three things: code load requirements, the maximum panel size the chosen glass can span without flexing, and the look you want. For residential balcony and deck railings in Ontario with 1/2″ tempered or 9/16″ tempered-laminated glass, typical post spacing is 4 to 6 feet on centre. Spigot-and-clamp systems often use 4 to 4.5 feet. Standoff systems sometimes go wider. Frameless top-rail systems can push to 8 feet between supports with engineered glass. Below is how we set the spacing on each system type.

What does “post spacing” mean exactly?

The distance from the centre of one post (or spigot pair, or standoff group) to the centre of the next. Code and engineering tables work in this measurement. Smaller spacing means more posts and a busier visual; wider spacing means fewer posts and a cleaner look but heavier engineering demand.

Why does it depend on the system?

Different attachment methods transfer load differently. A spigot grabs the glass at the bottom only – wind and lean loads cantilever up through the glass back to the spigot, so spacing has to keep glass span within rated limits. A standoff bolts through the glass and into the rim or wall – different load path, often wider allowable spans. A top-rail system uses the rail itself as a structural member, so posts can be further apart and the glass is partly there for infill.

What’s typical for a spigot system?

For a deck or balcony with 4-foot-tall panels in 1/2″ tempered, spigot spacing usually lands at 4.5 to 5 feet between pairs of spigots. Two spigots per panel is standard. The panel itself spans between the spigot pair plus the joint to the next panel.

What’s typical for standoffs?

Wall- or fascia-mount standoffs supporting a glass panel: 24 to 36 inches between standoffs on a single panel is normal. The standoff group acts as a single rigid mount; panel-to-panel joints are typically 1/4″ to 3/8″ wide.

What’s typical for a top-rail system?

With a continuous top rail bearing the load, posts can be 6 to 8 feet apart. The glass is held in a bottom channel and the top rail caps everything. This is structurally efficient and visually clean.

Does post material matter?

Yes for engineering, not for the spacing math itself once you’ve chosen. Stainless steel posts (typically 1.5″ or 2″ square) are the most common for premium residential work. Aluminum posts are lighter and cheaper but with appropriate sizing. Glass-only spigot installs eliminate vertical posts entirely.

What about windy locations?

Lakeshore and high-floor balconies pick up much more wind load. Engineering may require closer post spacing, thicker glass, or both. Burlington’s lakefront is the textbook case — our glass deck railings in Burlington page shows how exposure changes the spec. We discuss wind exposure on the consult – see our wind-load page for detail.

How do you decide between fewer wide-spaced posts and more closely-spaced ones?

Honest answer: aesthetics often drive it as much as engineering. Some homeowners want the cleanest possible look with maximum glass and minimal hardware. Others prefer a more traditional post-rhythm. We show both options and let you pick once we know the engineering allows either.

Have a project you’re sizing up?

We do free in-home consults across the GTA. Call 416-897-0767 or message luxglass.com.