Measuring Gate Opening Width for Automatic Parking Barriers

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To measure for an automatic parking barrier, record the clear opening width between the posts or walls at the lowest and highest points, plus the height and surface conditions on both sides. The arm and housing must fit that clear width with the correct clearances, so the final specification is confirmed on site before production begins.

Why the Clear Opening Matters

The clear opening is the free space a vehicle passes through, measured from one inner face to the other. For an automatic parking barrier, this width determines the arm length, the housing position and whether the barrier can open and close without striking walls, posts or curbs.

Many entrances are not perfectly square. Walls can lean, pavement can slope and surfaces can differ on each side. For this reason, a single number taken from plans is not enough, and the measurement should be taken directly at the installation point.

What to Measure On Site

Take measurements at several heights and points, and write each one down clearly:

Clear width at the bottom, middle and top of the opening
Distance from the face of the post or wall to the centre line where the barrier will sit
Height of the entrance and any overhead obstructions
Slope and level of the pavement on both sides
Location of drains, cables, sensors and existing ducts

Photos of the opening from several angles help the team review the site accurately before drawing the barrier.

How the Planning Stage Works

After the site visit, the measurements are transferred to a drawing that shows the barrier position, the arm length, the housing location and the clearances on each side. The written specification lists the materials, the finish and the installation details so that the client can review them before work starts.

The client approves the drawing and specification in writing. Any change requested at this stage is simpler and quicker to make than a change after production has started.

Production in the Factory

Once the drawing is approved, the barrier components are cut and assembled in the factory at Rival Street 37 in Tel Aviv. Steel parts are prepared to the drawing, and the arm and housing are fitted to the confirmed clear width so that they match the site and not a general standard.

Finishing follows production. Steel components can be hot-dip galvanized and then powder coated, which protects them in outdoor conditions where they are exposed to weather and traffic.

Installation and Final Checks

On installation day, the housing is fixed to a level base, the arm is aligned with the centre line and the opening is checked for free movement through its full travel. Cabling and safety sensors are tested together with the operator.

Standard values for railings and safety elements, such as those in Israeli standard SI 1142, are checked with the project engineer as part of the approval, so that the final installation meets the requirements that apply to the site.

Tips for Owners Checking Their Entrance

Before contacting a supplier, owners can prepare a few items to speed up the process:

A simple sketch of the entrance with measurements noted on it
Clear photos of both posts or walls and the surrounding pavement
Information about the expected traffic, such as the number of vehicles per day
Any existing barrier or gate that is being replaced

With this information, the supplier can plan the visit more precisely and avoid unnecessary repeat trips.

Frequently asked questions

Should I measure the width at one point or several?

Measure at several points, including the bottom, middle and top of the opening. Walls are often not perfectly parallel, so the narrowest point is the one that controls the barrier fit.

Do I need to measure the height as well?

Yes. The height of the entrance and any overhead obstructions affect the barrier housing position and the arm movement, so they should be recorded together with the width.

Can I send measurements by photo instead of a site visit?

Photos help with the first review, but a site measurement is needed before the drawing is finalized, because small differences in level and alignment directly affect the installation.

What happens if the measurements change after approval?

Changes can be made at the drawing stage before production begins. Once parts are manufactured, changes are more costly, which is why the approval step is important.

Common mistakes to avoid

Measuring only once at the centre of the opening and ignoring the narrowest point or the surface slope is the most common error. Recording the width without noting the height, obstructions and cable routes can also lead to a barrier that does not fit the site.

Our recommendation

Take the clear width at three heights, note the narrowest value, and confirm the pavement level on both sides before approving the drawing. Ask for the written specification to be checked on site together with the arm length and housing position.

Summary

Correct measurement of the clear opening, combined with a site-confirmed drawing and a written approval, is what makes an automatic parking barrier fit and work reliably.

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