Steel-Look Pivot Doors: Floor Spring Load and Weight Limits

t442-33

A steel-look pivot door sits on a floor spring that carries the full weight of the leaf and turns it on a single pivot point, so the spring's rated load must exceed the actual door weight with a safety margin. Door size, glazing, and profile mass all push that weight up, and exact capacity values should be confirmed with the spring manufacturer and the structural engineer before the order is fixed.

How a Floor Spring Carries a Pivot Door

In a pivot door the leaf rotates around a pin set in the floor spring at the bottom and a top pivot in the frame. The floor spring therefore takes the vertical weight of the door, while the top pivot mainly guides alignment. This is why the spring rating matters more than almost any other hardware choice on a heavy entrance door.

When specifying, think of the spring as the load-bearing point of the whole leaf, not just a closing mechanism.

What Adds Weight to a Steel-Look Door

Steel-look profile doors are heavier than standard aluminum because of the profile section, the reinforcement, and the glazing or panel infill. Several factors add to the total mass:

Overall leaf height and width
Glass thickness and whether it is laminated
Infill panels and internal reinforcement
Hardware such as handles, locks, and closers

Calculate the final weight with all infill and hardware included, not the bare profile.

Reading the Spring Rating Correctly

Manufacturers publish a maximum door weight and sometimes a maximum width for each floor spring model. Treat that published figure as a ceiling, not a target. A door running close to the limit will wear the spring faster and may sag over time.

Ask for the rating in writing and compare it with the calculated leaf weight. Exact values depend on the chosen model, so confirm them directly with the supplier rather than relying on general figures.

Pivot Position and Balance

Where the pivot axis sits relative to the leaf changes how weight is distributed. An off-centre pivot can make a heavy door feel sluggish or cause it to swing closed unpredictably. Symmetrical placement and accurate balance are both important for a door that opens smoothly day after day.

Balance is set during installation, so the frame must be square and plumb before the spring is fixed in place.

Floor Construction and Anchoring

The floor spring transfers load into the slab or the sub-floor, so the anchoring must be solid. A thin screed, a hollow floor, or a finish that is not yet cured can all compromise the fixing. The spring pocket must be cut to the correct depth and the spring set level with the finished floor.

Coordinate the spring location with the flooring contractor early, before tiles or stone are laid.

Specifying with the Factory

Send the factory the overall dimensions, glazing and infill details, the chosen hardware, and the floor finish. We take the measurements on site, prepare a written specification, and agree the floor spring model before production begins. Confirmation of load values and fixing details is part of that approval step, so the door is designed around the real weight from the start.

Frequently asked questions

Can a steel-look pivot door use a standard floor spring?

Only if the spring's published maximum weight and width comfortably exceed the actual door weight. Heavy or wide steel-look leaves often need a higher-rated spring than a standard residential model.

How do I know the door weight before ordering?

Add up the weight of the profile, glazing or infill, reinforcement, and hardware based on the final drawing. Confirm the total with the factory and compare it with the spring rating.

Does glass thickness affect the spring choice?

Yes, thicker or laminated glass increases the leaf weight and can push the door past a spring's safe limit. Always recalculate the weight when the glazing specification changes.

Who should confirm the floor spring load?

The architect or structural engineer should confirm the load and anchoring together with the spring supplier and the factory. Exact capacity values are best checked in writing before installation.

Common mistakes to avoid

Choosing a floor spring based only on door size and ignoring the infill, glazing, and hardware weight is the most common error. Installing the spring before the floor finish is set can also lead to poor anchoring and a door that drops out of alignment.

Our recommendation

Calculate the final leaf weight with all glazing and hardware, select a spring rated well above that figure, and confirm the floor build-up before the spring pocket is cut. Share the drawing with the factory early so the balance and fixing are designed in, not adjusted later.

Summary

A steel-look pivot door depends on a floor spring rated for its full weight, with the pivot, floor, and glazing all considered together. Confirm the numbers early and the door will hang and close reliably.

השאירו פרטים ונחזור אליכם