BSP KW4 PAS – VENTILATED CLADDING SYSTEM – PASSIVE SUBSTRUCTURE

1. SYSTEM

The BSP KW4 PAS passive substructure system is a versatile substructure system for fixing a wide variety of cladding types to external façades using ventilated façade technology. The system consists of BSP KW4 PAS passive brackets and vertical aluminium profiles, most commonly BSP KWR1 and KWR2. All aluminium components of the BSP KW4 PAS system are manufactured from extruded aluminium alloy EN AW 6060 T66 or EN AW 6063 T6.

2. CONSOLES

The BSP KW4 PAS passive brackets have been designed to meet the increasingly stringent regulations regarding the thermal insulation performance of external partitions. These components serve a structural function, transferring vertical and horizontal loads from the façade to the building structure. There are two types of brackets: load-bearing brackets, which transfer both vertical and horizontal loads and are fixed to two anchors, and wind brackets, which transfer only horizontal forces and are fixed to a single anchor. The specially designed shape of the brackets and the carefully selected materials from which they are manufactured allow for a relatively high load-bearing capacity whilst maintaining very favourable thermal insulation parameters. By using BSP passive brackets, the effect of ‘thermal bridges’ in the thermal insulation layer of the external façade can be significantly reduced.

The KW4 PAS console is made up of aluminium components and a plastic chambered spacer with excellent thermal insulation properties. The chambers of the spacer are enclosed within a layer of thermal insulation wool, creating an unventilated air space, which also enhances thermal insulation. The spacer is clamped into the sockets of the aluminium components and is thus permanently connected to them. The brackets feature a specially designed 1.5 mm thick pocket, which significantly facilitates the fixing of profiles and the alignment of their planes. The holes in the brackets for fixing the profiles allow for their free thermal expansion. Anchoring elements selected on the basis of structural calculations are used to fix the brackets to the building structure. Special BSP HDPE system washers (alternatively EPDM or PVC) are used under the brackets to prevent corrosion at the point of contact between the aluminium and the substrate and to achieve better thermal insulation performance.

The console is classified as non-fire-spreading when exposed to external fire. In terms of fire performance, it has a B-s3,d0 rating. It also has a positive ITB opinion regarding its use above 25 m and in fire separation zones. 

3. PROFILES

T-profiles are used to join façade panels. Angle profiles, on the other hand, are used as support profiles in the central section of the panels. The flange thickness of the profiles is 1.75 or 2 mm. The flange width of 60 or 70 mm ensures high rigidity of the profiles, allowing them to be fixed at wide spacings. Angle profiles have a front wall 40 or 50 mm wide. T-profiles, on the other hand, have a front wall width of 100, 120 or 140 mm, which allows for relatively significant horizontal adjustment at the panel joints and enables the fixing of panels where a large fixing distance from the edge (<50 mm). The surface of the front walls of the profiles is grooved, which provides a larger bonding surface for the panels. The profiles are fixed to the brackets using 4.8x19 A2 self-tapping screws.

4. GENERAL

The aluminium components of the BSP substructure are classified, without testing, as Class A1 for reaction to fire in accordance with standard PN-EN 13501-1+A1:2010, on the basis of European Commission Decision No 96/603/EC, 2000/605/EC and 2003/424/EC.

The BSP KW4 PAS substructure system is classified as durability class B in accordance with PN-EN 1999-1-1:2011 and, without protective coatings, can be used in environments with atmospheric corrosion categories C1, C2 and C3 according to PN-EN ISO 12944-2:2001. Following an additional protective treatment – anodising of the aluminium components – it may also be used in environments with atmospheric corrosion categories C4 and C5.

Furthermore, the system has been approved by the ITB in accordance with Section 225 of the Regulation of the Minister of Infrastructure as maintaining its integrity under fire conditions for a period of not less than 60 minutes.

The BSP substructure should be installed in accordance with a detailed design drawn up by designers with appropriate expertise in the field of structural engineering and construction. The layout of the substructure and the spacing of the components (the strength of the entire system) should be verified by structural calculations prepared by a structural engineer with qualifications in the field of structural engineering and construction. 

Panel types available for this system:

• Architectural concrete
• Porcelain stoneware
• HPL
• Stone
• Steel panels
• Aluminium composite – panels
• Aluminium composite – flat panels
• Rockpanel
• Quartz sintered
• Glass
• Fibre cement
• Aluminium blinds

https://www.bspsystem.com/systemy/system-pasywny-bsp-kw4-pas/

Dimensions of the brackets

A tutorial video demonstrating how to use the system in Revit!

This instructional animation demonstrates the application of the BSP KW4 PAS ventilated façade system using an existing architectural design in Revit as an example. Modelling based on parametric 3D system solutions and detailed 2D drawings, taking into account the main components of the system.

We invite you to watch. 

A file containing downloadable footage from the film