MHB Steel Folding Systems
Exterior steel folding systems for projects where a wider opening, folding movement, steel profiles and glazed leaves need to work as one architectural composition. Royal Design Marbella represents MHB across the Costa del Sol and helps project teams review the opening, available drawings and the appropriate MHB route.
A folding system is not only about opening width. It is about how the leaves move within the architecture.
MHB steel folding systems are relevant when the project needs a wide opening but still wants the visual character, strength and profile language of steel.
The decision should start with the actual opening: how much of the façade needs to open, where the folded leaves should sit, whether the route folds outwards and how the system relates to nearby windows, doors or fixed glazed areas.
The system is best understood through its movement.
These renders show the folding route across three moments: completely closed, partially closed and completely opened. They help explain the relationship between the steel leaves and the final opening composition.



The folding route should be resolved around the usable opening and the parked leaves.
A folding system affects more than the glass line when closed. The project should also consider how the leaves stack when open, how the threshold and track are resolved and how the folded position interacts with the surrounding architecture.

The technical route should be reviewed from the real opening.
The documented folding door route is based around the SL30-ISO profile series and is intended for exterior steel folding applications where the system, glazing, leaf weight and movement need to be considered together.
The correct configuration should be reviewed for the specific project rather than assumed from a generic folding-door layout.
Published values and classifications depend on the documented configuration. The applicable system route should be confirmed for the individual project.
Folding movement should not weaken the architectural clarity of the elevation.
The steel lines, glass proportions, folding leaves and open position all affect the final composition. The system should be considered as part of the elevation, not only as a mechanism for creating a larger opening.


The strongest result comes when the folding movement, parked leaves and steel frame are developed as one architectural system.
Start with the opening. Then review the appropriate MHB folding route.
Royal Design Marbella represents MHB across the Costa del Sol, helping architects, designers and project teams review available project information and coordinate relevant drawings, quotations and technical conversations. The exact execution route depends on the system, project and MHB process.
Share the opening
Provide the available plans, elevations, dimensions and intended relationship between the interior and exterior spaces.
Review the folding route
The folding direction, sash arrangement, glazing and available project requirements can be reviewed in the context of the MHB system.
Coordinate the next information
Drawings, quotations and relevant technical conversations can then be coordinated according to the project and applicable MHB process.
Considering a steel folding system for a wide architectural opening? Start with the plans and movement route.
Share the project information currently available and Royal Design Marbella can help review the context and coordinate the appropriate next conversation for the MHB route.