MHB steel folding system integrated into an exterior architectural opening
MHB · Exterior steel folding systems

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.

Folding movement Closed · Partial · Open
3-sash & 5-sash routes Documented system options
Project-specific review Opening · Drawings · Requirements
01 · The folding system
Steel · Glass · Movement · Opening

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.

MHB steel folding system within an exterior glazed opening
Closed · In motion · Open

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.

Render of an MHB steel folding system completely closed
01 Completely closed
Render of an MHB steel folding system three quarters closed
02 Three quarters closed
Render of an MHB steel folding system completely opened
03 Completely opened

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.

02 · System information
MHB steel folding system viewed as part of an exterior architectural project
SL30-ISO · Folding route

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.

Profile series SL30-ISO
Movement Documented route folded outwards
Configurations 3-sash and 5-sash routes documented
Dimensions Height 1500–3000 mm · sash width 500–1000 mm
Weight Maximum documented sash weight of 100 kg
Security Burglary resistance class RC2 possible, depending on configuration

Published values and classifications depend on the documented configuration. The applicable system route should be confirmed for the individual project.

Architectural integration

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.

MHB steel folding system integrated into exterior architecture
MHB steel folding system and glazed exterior opening
03 · One system

The strongest result comes when the folding movement, parked leaves and steel frame are developed as one architectural system.

04 · Your project
From opening to folding route

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.

01

Share the opening

Provide the available plans, elevations, dimensions and intended relationship between the interior and exterior spaces.

02

Review the folding route

The folding direction, sash arrangement, glazing and available project requirements can be reviewed in the context of the MHB system.

03

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.