How Wide Should a Vehicle Entrance Gate Be? | Aremco Barriers

How Wide Should a Vehicle Entrance Gate Be?

One of the first questions you'll need to answer when ordering a manual swing gate is:

How wide does my gate need to be?

It might seem straightforward – measure the entrance and order a gate to match.

In practice, there are several things worth considering before deciding on the final width.

The vehicles using the entrance, turning angle, available space, gate configuration and even exactly where you take your measurement from can all affect the specification.

At Aremco Barriers, we've been manufacturing manual gates and barriers for more than 40 years. In this guide, we'll explain what to consider when deciding how wide a vehicle entrance gate should be.

What Is the Clear Opening of a Gate?

The clear opening is the usable space available for vehicles to pass through when the gate is fully open.

This is one of the most important measurements when planning a vehicle entrance.

It shouldn't be confused with the overall width of the complete gate installation, which may include:

• Gate posts
• Hinges
• Locking posts
• Stops
• Other components

When discussing a gate with Aremco, make sure we're both working from the same measurement.

Where Should I Measure a Swing Gate Opening?

For Aremco manual swing gates, an important measurement is the distance from the inside of one post to the inside of the opposite post.

If the posts haven't yet been installed, measure the proposed clear opening and tell us that the installation is new.

Don't simply measure the complete width of the available area and assume this is automatically the gate opening.

Posts and foundations also require space.

What Is a Typical Width for a Vehicle Gate?

There isn't one standard width suitable for every entrance.

Aremco standard single-leaf manual swing gates are generally available for openings from approximately:

3 metres to 6 metres

However, the correct width depends on the vehicles that need to use the entrance.

A gate suitable for cars may not provide enough practical room for delivery vehicles or HGVs.

Is a 3 Metre Gate Wide Enough for a Car?

A 3 metre opening may provide sufficient space for many normal cars where the vehicle can approach reasonably straight.

But vehicle width isn't the only consideration.

You also need to think about:

• Wing mirrors
• Turning angle
• Kerbs
• Walls
• Fencing
• Gate posts
• Driver visibility
• Approach road width

A vehicle may physically fit through an opening while still being awkward to manoeuvre through it safely.

Don't Design the Opening Around Vehicle Width Alone

Suppose a vehicle is approximately 2 metres wide.

That doesn't mean a 2.1 metre opening is sensible.

Drivers need clearance on both sides, and vehicles rarely approach every entrance perfectly straight.

Mirrors also extend beyond the body of many vehicles.

The gate opening should provide a practical operating clearance, not simply enough room for the vehicle to squeeze through.

Turning Vehicles Need More Space

Turning movements can make a major difference.

A vehicle approaching a gate in a straight line requires less usable space than one making a tight 90-degree turn immediately before entering.

This is particularly important where an entrance is:

• Directly off a narrow road
• Between buildings
• Close to parked vehicles
• Near a wall or fence
• Positioned on a tight corner

The wider and longer the vehicle, the more important its turning path becomes.

What About Vans?

Commercial vans vary considerably in size.

A small van may use an entrance almost as easily as a car, while a long-wheelbase van requires considerably more manoeuvring space.

If vans regularly use the entrance, don't design it solely around the cars on site.

Consider the largest vehicle that normally requires access.

What About HGVs?

HGV entrances require much more careful consideration.

The width of the vehicle is only part of the issue.

Vehicle length, trailer movement and turning radius can dramatically affect the space required.

A gate opening that looks extremely wide when viewed on foot can become surprisingly restrictive when an articulated vehicle tries to turn through it.

For entrances regularly used by HGVs, vehicle tracking or appropriate professional site-design advice may be required.

Don't Forget Emergency and Service Vehicles

Think beyond everyday traffic.

Could the entrance ever need to accommodate:

• Fire appliances
• Ambulances
• Refuse vehicles
• Delivery lorries
• Maintenance vehicles
• Construction plant
• Mobile cranes
• Large contractor vehicles

An entrance designed only around the smallest everyday vehicle can create problems later.

Single-Leaf or Double-Leaf Gate?

The required opening width can also determine whether a single or double-leaf swing gate is more appropriate.

A single-leaf gate uses one complete gate leaf hinged from one side.

A double-leaf gate divides the opening between two leaves, with one opening from each side.

For wider openings, a double-leaf arrangement can be more practical.

How Wide Can a Single-Leaf Swing Gate Be?

Aremco's standard single-leaf manual swing gates are generally available for openings between approximately 3m and 6m.

As a gate becomes wider, the leaf becomes larger and heavier.

The forces placed on the hanging post, hinges and foundations also increase.

There is therefore a practical limit to how large a single swinging leaf should become.

For wider entrances, speak to us about a double-leaf arrangement.

Why Not Just Make the Gate as Wide as Possible?

A very wide opening might sound like the safest solution, but unnecessarily increasing the gate size has consequences.

A larger gate can mean:

• More steel
• Greater weight
• Larger opening arc
• Increased wind loading
• Greater loads on the hanging post
• More substantial foundations
• Higher manufacturing cost

The aim should be to provide enough practical clearance for the vehicles using the entrance, rather than simply making the gate as large as the available site allows.

Remember the Gate Has to Open Somewhere

This is one of the easiest things to overlook.

A 5 metre single-leaf gate needs enough space for approximately a 5 metre gate leaf to swing through its opening arc.

Look for potential obstructions such as:

• Buildings
• Fences
• Parked vehicles
• Bollards
• Signs
• Landscaping
• Storage areas
• Raised kerbs

If there isn't enough space for a single leaf, a double-leaf arrangement may be worth considering.

Check the Ground Through the Opening Arc

The ground level also matters.

If the surface rises sharply in the direction the gate opens, the bottom of the gate may foul the ground.

This can happen on:

• Sloping entrances
• Uneven yards
• Ramps
• Poorly surfaced areas
• Sites with raised kerbs

Measure and consider the ground through the whole gate opening arc, not just underneath the gate when it is closed.

Which Direction Should the Gate Open?

The appropriate opening direction depends on the site layout.

You need to consider:

• Vehicle movements
• Pedestrian routes
• Public highways
• Available space
• Ground levels
• Buildings and fencing
• How the gate will be secured open

A gate shouldn't be positioned so that its normal operation creates an unnecessary obstruction or hazard.

Do I Need Space for the Posts?

Yes.

The clear vehicle opening isn't the complete installation width.

Posts sit outside the usable opening and require appropriate foundations.

If you're working within a restricted overall width between two buildings or boundaries, tell us the total available space, not just the desired vehicle opening.

This allows the posts to be taken into consideration.

What If I Already Have Gate Posts?

If you're replacing an existing gate and intend to retain the posts, provide accurate measurements and photographs.

Don't assume a new gate can automatically be attached to existing posts.

The posts need to be suitable for the size, weight and fixing arrangement of the new gate.

Their condition and foundations should also be considered.

How Accurately Do I Need to Measure?

Accurate measurements are particularly important when a gate is being manufactured to suit a specific opening.

Don't estimate an opening as "about 4 metres" if the gate is going to be manufactured specifically for it.

Use a suitable tape measure and record the dimensions clearly.

Where possible, measure more than once.

Should I Measure at the Top and Bottom?

If the gate is being installed between existing structures or posts, taking measurements at several positions can help identify whether everything is parallel.

For example, an opening may measure differently at ground level than it does higher up.

This could indicate that existing posts or walls aren't vertical.

What Measurements Should I Send Aremco?

When requesting a manual gate quotation, useful information includes:

• Clear opening required
• Overall available width
• Proposed gate height
• Single or double leaf
• Largest vehicle using the entrance
• Direction of approach
• Preferred opening direction
• Ground surface
• Ground slope
• Required finish
• Installation method

Photographs are extremely helpful.

A simple sketch showing the entrance dimensions can also make things much clearer.

Should I Measure Before or After Installing the Posts?

If you're ordering a complete gate and post system, speak to Aremco before installing the posts.

The gate, posts, hinges and required clear opening need to work together.

Installing posts first based on assumed dimensions can create unnecessary problems.

If posts already exist, provide their dimensions and the clear distance between them.

What If I'm Not Sure About the Width?

Don't guess.

Send us photographs and approximate measurements and explain what vehicles need to use the entrance.

We can then discuss what additional measurements may be required before manufacture.

It's much easier to resolve a measurement question before a gate is manufactured than after it arrives on site.

How Wide Should My Vehicle Gate Be? – Quick Guide

Before choosing the gate width, consider:

The largest vehicle requiring access

Not just the vehicle that uses the entrance most frequently.

The approach angle

A straight approach generally requires less manoeuvring room than a tight turn.

Usable clear opening

Make sure you're discussing the actual space available for vehicles.

The opening arc

The gate leaf needs somewhere to go.

Posts and foundations

These require space outside the clear opening.

Future access

Consider deliveries, maintenance and emergency vehicles.

Need Help Measuring for a Manual Swing Gate?

If you're unsure what size gate you need, Aremco Barriers can help.

Send us photographs of the entrance together with your measurements and details of the vehicles that need access.

Aremco manufactures manual steel swing gates for commercial, industrial and private applications throughout the UK, with standard and bespoke sizes available depending on the application.

With more than 40 years' experience manufacturing manual barriers and gates, we'd much rather help establish the correct dimensions before manufacture than discover a problem when the gate reaches site.

Frequently Asked Questions

What width should a vehicle gate be?

There isn't one width suitable for every entrance. The correct width depends on the vehicles using the site, their approach and turning movements and the available space.

Is a 3 metre gate wide enough for a car?

It can provide sufficient space for many cars where the approach is suitable, but the complete site layout and manoeuvring clearance should be considered.

How wide can an Aremco single-leaf swing gate be?

Aremco's standard single-leaf manual swing gates are generally available for openings from approximately 3m to 6m.

When should I use a double-leaf gate?

A double-leaf arrangement can be considered for wider entrances or where dividing the opening between two smaller leaves is more practical.

Where do I measure a gate opening?

For an Aremco swing gate, an important measurement is the clear opening from the inside of one post to the inside of the opposite post.

Should I include the posts in my gate measurement?

Be clear whether you're providing the required clear vehicle opening or the total available installation width. The posts occupy additional space outside the usable opening.

Can Aremco manufacture bespoke gate sizes?

Yes. Bespoke options are available depending on the product and application.