How to Choose the Right Floor Spring Machine for a Commericial Glass Door

A floor spring machine is one of the most important pieces of hardware in a glass door system. It controls the door’s opening, closing and movement, while supporting the door through the bottom pivot and patch fitting arrangement.

Choosing the right model is not simply about finding a floor spring with a suitable weight capacity. The door width, glass thickness, usage frequency, closing requirements and installation conditions all need to be considered.

Whether you are selecting hardware for an office entrance, commercial building, showroom or interior glass partition, here are the main things to check before choosing a floor spring machine.

1. Start With the Door Size and Weight

The first step is to determine the glass door width and approximate weight.

A larger glass door puts more load on the floor spring, particularly when the door is wide. Two doors may have similar weights but require different floor spring capacities because their widths are different.

For example, consider:

• Door width
• Door height
• Glass thickness
• Glass type
• Hardware weight

For a frameless glass door, the weight of the hardware should also be considered when calculating the overall load.

Do not select a floor spring only because its maximum weight rating appears to match the door. Door width and operating conditions are equally important.

2. Check the Glass Thickness

Glass thickness is another important consideration when selecting the complete door hardware system.

Common glass thicknesses for glass doors include 10 mm and 12 mm, but the actual requirement depends on the door design and project specification.

The floor spring itself works together with other components such as:

• Bottom patch fitting
• Top patch fitting
• Top pivot
• Bottom pivot
• Door handle
• Lock

Make sure the floor spring and associated fittings are compatible with the glass and door configuration.

3. Consider How Frequently the Door Will Be Used

Not every glass door needs the same level of durability.

An internal office door used occasionally has different requirements from a main entrance used throughout the day.

Low to moderate traffic

Suitable for applications such as:

• Internal office rooms
• Meeting rooms
• Residential areas
• Small commercial spaces

High traffic

A more robust floor spring should be considered for:

• Office building entrances
• Retail stores
• Hotels
• Commercial buildings
• Showrooms
• Public areas

For high-traffic applications, choosing a reliable floor spring with appropriate capacity can help reduce maintenance and premature replacement.

4. Think About the Door Width, Not Just Weight

This is one of the most commonly overlooked factors.

A wide glass door can place considerable stress on the floor spring mechanism because of the leverage created by the door leaf.

Therefore, when selecting a floor spring, check both the maximum door weight and maximum recommended door width specified for the particular model.

A floor spring that can carry the weight does not automatically mean it is suitable for a very wide door.

5. Decide How the Door Should Close

Different projects have different closing requirements.

Ask:

Should the door simply close automatically, or should it have a hold-open function?

Depending on the floor spring model, you may find options such as:

• Self-closing
• Hold-open
• Adjustable closing speed
• Adjustable latching speed
• Different opening-angle options

For example, a busy office entrance may benefit from controlled closing and easy operation, while a fire or safety-sensitive application may have specific requirements that must be followed.

6. Check the Opening Angle

The required opening angle should be considered before purchasing the floor spring.

Depending on the model, the door may be designed to open to a particular angle such as 90°, 105° or 120°.

Think about the actual site:

• Is the door next to a wall?
• Is there another door nearby?
• Does the door need to open fully?
• Is there enough clearance around the entrance?

Choosing the correct opening configuration helps prevent the door from hitting nearby walls, furniture or other fixtures.

7. Consider the Door Configuration

The floor spring must match the type of glass door being installed.

For example:

Single glass door

A single swing door generally uses one floor spring with the appropriate pivot and patch fittings.

Double glass door

A pair of doors may require additional consideration for the closing sequence and alignment of the two leaves.

Single-action door

The door opens in one direction and returns to the closed position.

Double-action door

The door can swing in both directions, depending on the floor spring system. The correct configuration should be confirmed before selecting the machine.

8. Check the Floor Condition Before Installation

A floor spring is installed inside the floor, so the existing floor construction needs to be checked before installation.

Consider:

• Available floor depth
• Floor material
• Concrete condition
• Waterproofing
• Finished floor level
• Drainage or services below the floor
• Space available for the floor box

This is particularly important during renovation projects where the floor has already been completed.

A suitable floor spring still cannot perform properly if the installation location is unsuitable.

9. Look at Adjustment Options

Adjustment capability can make a significant difference during installation and maintenance.

Depending on the model, adjustments may be available for:

• Closing speed
• Latching speed
• Door alignment
• Closing action
• Opening angle

Good adjustment capability allows the installer to fine-tune the door after installation and achieve smoother operation.

10. Match the Floor Spring With the Other Hardware

The floor spring should not be selected as an isolated component.

It forms part of a complete glass door system.

A typical frameless glass door may include:

Floor Spring → Bottom Patch → Glass Door → Top Patch/Pivot → Handle → Lock

All these components need to work together.

For example, the wrong bottom patch fitting or pivot arrangement can create installation problems even if the floor spring itself is suitable.

When Should You Replace a Floor Spring?

A floor spring may need inspection or replacement when you notice:

• Door no longer closes properly
• Door closes too quickly
• Door closes too slowly
• Door does not return to the correct position
• Door becomes difficult to operate
• Oil leakage from the floor spring
• Unusual noise during operation
• Door alignment problems
• Excessive movement around the bottom pivot

Before replacing the complete system, it is worth checking whether the issue can be corrected through adjustment, alignment or replacement of a compatible component.

Frequently Asked Questions

What is a floor spring machine used for?

A floor spring controls the movement and automatic closing of a swing glass door. It is installed into the floor and works with the door’s pivot and patch fittings.

How do I know what capacity floor spring I need?

Start with the door’s weight and width, then consider the usage frequency and door configuration. Always compare these details with the manufacturer’s recommended specifications.

Is a floor spring suitable for every glass door?

No. Floor springs are primarily used for swing or pivot-type doors. Sliding glass doors normally require a suitable track and roller system instead.

Does glass thickness affect floor spring selection?

Glass thickness affects the selection of the complete hardware system, including the compatible patch fittings and pivots. The complete assembly should be checked together.

What is more important: door weight or door width?

Both matter. A wide door can place additional stress on the mechanism even when its weight is within the floor spring’s stated capacity.

Can a floor spring be used for an office entrance?

Yes. Floor spring systems are commonly used for glass office entrances, particularly where controlled self-closing operation is required.

Looking for a floor spring machine for a glass door in Dubai or the UAE?

At ABL Mart, you can find glass door hardware including floor springs, patch fittings, pivots, handles, locks and other glass door accessories for office, commercial and interior glass applications.

Need help selecting the right model? Share the door width, height, glass thickness, approximate weight and door configuration with us, and the appropriate hardware can be determined more accurately.