Structural window installation bracket for pre-wall installation of aluminium, timber or composite windows in double-skin facades, rainscreen cladding systems, and cavity wall constructions.

Designed for cantilevered applications where the window sits outside the structural wall line, typically used in new-build commercial and residential projects requiring high thermal performance and precise load transfer.

Can be used on the following wall types:

• Concrete.
• Lime/ sandstone blocks.
• Timber.
• Aerated concrete.
• Hollow brick clay block (HLZ).
• Light gauge Steel Framing (SFS)

The SFS JB-D® Plus is a pre-wall window installation bracket system engineered for structurally secure, cantilevered window positioning in double-skin facades, rainscreen systems, and cavity wall constructions.

Designed for aluminium, timber and composite window frames, it enables accurate, load-tested fixing of windows outside the structural line, supporting high-performance thermal detailing and streamlined site logistics.

JB-D® Plus brackets are available in multiple sizes and adjustment ranges to accommodate different wall constructions and insulation depths. The system includes vertical and lateral adjustment features and is supplied with tested load-bearing data in accordance with IFT MO-02/1. Ideal for commercial and residential new build and retrofit projects.

Features and benefits:

- In front of the wall installation:

• A fastening system for in front of the wall installation with national technical approval – which also satisfies building components with safety barrier characteristics.
• Reduced number of fastening points required due to this solution catering for both load transfer and the installation of safety barriers (e.g. Juliet balconies).
• Structurally certifiable solution with documented component load capacities.
• Point load transfer of all the forces from the installed elements through rigid brackets.
• 3D adjustability for simple and quick alignment.
• Suitable for use on all cantilevers up to 150 mm.
• Universal application, including double-skin brick wall with wall opening edge strips.
• Flexible installation – can be installed from the interior of the building.
• Steel-based system, non-combustible material in accordance with DIN 4102-1 class A.

- Connection at the sides and top:

• High load capacity through rigid steel brackets.
• Ideal for installation in double-skin walls.
• Stepless adjustable.
• Pre-assembly in the factory possible.
• Suitable for connection to all commonly available frame materials.

- Connection at the bottom:

• Highest possible load transfer capacity ensured by the rectangular tube, even with large cantilevers.
• As the fastener connection boasts a low profile and sits flat on the reveal, it provides the optimum conditions for the completion of follow-on-trades such as sealing and external thermal insulation composite system (ETICS) installation.
• The stable and flat bearing surface transmits loads from the installed windows.
• Simple height adjustment using commonly available spacers, similar to soffit mounting.
• Quick and secure attachment of window sill connection (FBA) profile using system angles.
• Increased load transfer capacity from brackets for hollow bricks and weak wall substrates.

Approvals:

• Tested and approved National Technical Approval (abZ), Z-14.4-806 (DIBt).
• MO-02/1 – usability in accordance with IFT guideline.
• Fastenings in accordance with Austrian standard ÖNORM B 5320.
• IFT certified.
• RC2 – burglary resistance class in accordance with DIN EN 1627.