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We cut glass shelves in 6, 8 or 10 mm with polished edges all round. Glass table tops are toughened, 10 or 12 mm thick, with square or rounded corners. For a shelf, the span between the supports decides the thickness. For a table top, measure the base, not the old glass.
What thickness should my glass shelf be?
Our glass thickness tool suggests a thickness from the span between the supports:
| Span between supports | Tool suggestion |
|---|---|
| Up to 500 mm | 6 mm toughened |
| 500 to 800 mm | 8 mm toughened |
| Over 800 mm | 10 mm toughened, and check the sag in the shelf load tool too |
These are planning suggestions, not a structural calculation. The span is bracket centre to bracket centre, or the clear distance between two channels.
How much weight will a glass shelf hold?
Our shelf load tool takes the span, depth, thickness and how the shelf is held, and gives the load it carries when that load is spread evenly along the shelf. It covers a shelf resting on a bracket at each end and a shelf held in a channel at each end.
Know its limits before you rely on it:
- It is a planning guide, not a structural certification and not a design to BS EN 16612.
- It assumes the load is spread evenly, the edges are clean and polished, and the brackets themselves carry the load.
- A heavy object in the middle, a chipped edge or a weak bracket all reduce what the shelf holds.
- It does not cover a shelf held along its whole back edge in a wall channel. That works differently, and the tool deliberately leaves it out.
If the load matters, ask us for a specification, and have anything load-bearing checked by an engineer.
How do I measure for a glass shelf?
Step 1: Measure the span between the supports
Bracket centre to bracket centre, or the clear distance between the two channels. This sets the thickness.
Step 2: Measure the alcove at three heights
Measure across the alcove at the height of the shelf, then 100 mm above and below. Keep all three readings to show any taper.
Step 3: Allow clearance to fit it
Confirm the clearance required for the supports and opening. Label opening measurements clearly; if you supply a finished glass size, identify the allowances already taken off.
Step 4: Say how it is held and what it will carry
Tell us whether it sits on brackets, in channels or on pins, and roughly what will go on it.
Our glass shelf measuring guide has the full version.
What glass table tops do you make?
Our table tops are toughened glass, 10 or 12 mm thick, with square or rounded corners. You can choose a polished or bevelled edge. Table tops and mirrors are the only pieces we bevel; see our guide to edge finishes. The Shape choice offers Rake: one sloping side, the other corners square. For two sloping sides or any other outline, choose "Send us a template or CAD drawing instead" under Rake; we price that by hand.
How do I measure for a glass table top?
Measure the base, not the old glass.
- Measure the frame or base at its widest and its longest.
- Decide the overhang. Most tops overhang the frame by 10 mm to 25 mm on each side. Add it to the base size to get the glass size.
- Measure both diagonals of the base. If they differ, the base is out of square, so send us both figures rather than an average.
- Tell us the corner radius and how the top is supported: pads, a recessed frame or brackets.
Identify the approved finished glass size clearly. Say whether you want a full glass top or a protector over an existing surface, because they are different jobs. Our table top measuring guide covers each step.
How heavy is a glass table top?
Every millimetre of thickness weighs 2.5 kg per square metre. A 1200 × 700 mm top is 0.84 square metres, so in 10 mm it weighs about 0.84 × 25 = 21 kg. Check your size in the glass weight calculator. A weight is not a safe lifting limit: whoever lifts it should assess the task, the load, the route and the person, as the HSE manual handling guidance explains.
Give the support geometry, not only the glass outline
Record supports, load and overhang alongside the outline. A thickness tool cannot approve unknown brackets or a damaged base. Keep the component limits with the order; see thickness and spans.
Where to go next
Price your shelf in the configurator.
Questions we get asked
Are your glass shelves toughened?
The shelf configurator does not offer toughening. Our thickness tool suggests toughened glass for shelves, so ask us if you need one.
Can I use the shelf load tool for a shelf in a back channel?
No. A shelf held along its back edge in a wall channel is a different case, and the tool does not cover it. Ask us for a specification.
Should I copy the size of my broken table top?
No. Measure the base it sat on and add the overhang you want. The old top may never have been right.
Can I have a bevelled table top?
Yes. Table tops can have polished or bevelled edges.
Contact the team with your order reference and the step you need help with, or search all help topics.