Measuring Floor-Mounted vs Fascia-Mounted Glass Railings

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A floor-mounted glass railing is measured from the finished floor level along its full run, while a fascia-mounted railing is measured from the edge of the slab or fascia where the base profile is fixed. The mounting method changes the height reference, the fixing points and the allowance for the base, so both must be measured on site before production.

Why the mounting method changes the measurement

The two mounting methods look similar once installed, but they start from different reference points. A floor-mounted railing stands on the finished floor, usually with a base shoe or channel bolted down through the tile or concrete. A fascia-mounted railing is fixed to the outer edge of a slab, balcony or stair stringer, so the glass sits slightly outside the structure.

This difference affects the total height, the position of the first glass panel and the number of fixing points. Measuring the wrong reference is one of the most common reasons for a railing that does not fit.

What to measure on site

Before anything is ordered, the measurement should capture the real conditions at the location, not just the drawings. Note the following for each run:

Total length of each straight section and each corner
Height from the finished floor or the top of the slab to the required top of the glass
Thickness of any tiles, screed or finishing layers that will be added later
Width and condition of the fascia or edge where the base will sit
Any steps, slopes or level changes along the run

Take readings at more than one point, because floors and slabs are rarely perfectly level.

Floor-mounted specifics

For floor-mounted railings, confirm the final floor finish before measuring. If tiles are still to be laid, measure to the planned finished level and say so in the specification, otherwise the railing may end up too low or too high once the floor is complete. Check the position of the base channel relative to the edge of the floor, and note any cable runs, drains or reinforcement that could limit where anchors can go.

Plan the base anchors in the drawing so the glass panels line up with the posts or clamps.

Fascia-mounted specifics

For fascia-mounted railings, the key is the condition and dimensions of the fascia itself. Measure its thickness, check that it is sound and flat enough to take the base profile, and confirm the distance from the fascia face to the inside edge where the glass should sit. Any overhang or chamfer on the slab edge must be recorded, since it changes how the base sits and how the glass is positioned.

Also confirm whether the fixing will be bolted through the fascia or into the side of the slab, as this decides the type of anchor required.

From measurement to production

Once the site measurements are complete, the information is turned into a drawing and written specification. The drawing shows each run, the mounting method, glass thickness, handrail type and finish. The client reviews and approves it before production starts, which avoids changes later.

In the factory, components are cut and assembled to the approved measurements, then finished, typically with hot-dip galvanizing or powder coating for steel parts, before delivery.

Installation and final checks

On installation day, the base is fixed first and checked for level and alignment. Glass panels and handrails are then fitted and tightened. Confirm the final height and alignment against the approved drawing, and check that the railing meets the Israeli railing standard SI 1142 in general terms. Exact values for height, loads and spacing should be checked with the engineer for your building, not assumed.

A final inspection with the client before the work is signed off helps catch small issues early.

Frequently asked questions

Do I measure a floor-mounted railing from the slab or from the finished floor?

Measure from the finished floor level, including any tiles or screed still to be added. If the finish is not yet laid, record the planned level so the railing height is right once the floor is complete.

Can a fascia-mounted railing be fixed to any balcony edge?

It depends on the condition, thickness and flatness of the fascia or slab edge. The site should be checked to confirm it can take the base profile and the chosen anchors.

Why do I need to measure in more than one spot?

Floors and slabs are rarely perfectly level, so a single reading can give the wrong height or length. Multiple readings show the true variation along the run.

Who confirms the exact height and fixing details?

The exact height, loads and fixing details should be confirmed with the structural or building engineer, and the railing should be checked against SI 1142 in general terms.

Common mistakes to avoid

The most frequent errors are measuring before the final floor finish is decided and assuming the fascia can take any fixing without checking it. Both can force costly changes after production has started.

Our recommendation

Before ordering, record the mounting method, the reference level and the final floor or fascia condition on a simple sketch, then have the factory confirm the drawing. Taking this extra step at the start prevents most fit problems during installation.

Summary

Floor-mounted and fascia-mounted glass railings use different reference points, so measure from the correct level and record the base conditions carefully. A clear drawing and client approval before production help ensure a railing that fits the first time.

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