90 STRUCTURAL ELEMENTS
EARLY INVOLVEMENT OF A MASONRY DESIGN TEAM WILL ALLOW FOR THE SELECTION OF THE MOST APPROPRIATE SOLUTION FOR A SPECIFIC APPLICATION, ADDING VALUE TO THE PROJECT SOLUTION
barrier. Cavity trays are angled to ensure that any moisture in the cavity is directed away from the inner leaf. To enable the masonry support system, cavity barrier and cavity tray to all be accommodated at the edge of a fl oor slab needs very careful selection of components and a considered approach to the design. Without this, the masonry support system could end up penetrating the cavity barrier which could, in turn, compromise its integrity in a fi re. The location and performance
specifi cation of the horizontal fi re barrier will depend on the type of masonry support system specifi ed and how and where it is attached to the slab edge. There are many diverse types of masonry support systems available. The type of structure, the cladding material and system, width of the cavity, the masonry load, and the wind loading along with cost all need careful consideration when selecting an appropriate fi xing system as part of a holistic building
envelope solution.
Site tolerance is also a key consideration with many highly engineered masonry support products. That is because the concrete fl oor slab will have been built within a vertical tolerance of +/- 10 mm, as will the brickwork, which means the masonry support bracket will have to allow for vertical adjustment by up to 20 mm. This additional margin must be considered when working out the precise position of components and in assessing whether or not the support system will impinge on the cavity barrier.
It’s a complex picture and some manufacturers like us have a specialist masonry design team to provide specialist, unbiased advice to designers and contractors. The team can give impartial advice to both designers and contractors to help them fi nd the best performing and most cost effective solution for a particular application.
HBD LinkedIn QP_Golden QP 05/10/2021 09:36 Page 1 It is possible for some cavity barriers
to accommodate some level of penetration by the masonry support system. Where this is the case, we would recommend using a solution that has been tested to demonstrate compliance with the Building Regulations with supporting third party test evidence that the cavity barrier’s fi re performance will not be compromised.
Early involvement of a masonry design team will allow for the selection of the most appropriate solution for a specifi c application, adding value to the project solution. The team’s experience and expertise will enable them to break a scheme down into its component parts and to suggest alternative solutions and components to overcome particular challenges. Or, where a scheme has been over engineered, the team can also suggest alternatives to help save on cost.
Ben Williams is strategic masonry director at SIG
Understanding SterlingOSB Zero NowonLinkedIn
WWW.LINKEDIN.COM/SHOWCASE/ HOUSEBUILDER-DEVELOPER
All West Fraser’s Oriented Strand Board (OSB) products are manufactured using selected fibres of timber that are laid in cross directional layers and mechanically pressed to form a structurally-engineered panel, designed for construction and other industrial applications. OSB is
viewed by many as the natural successor to plywood because it is more eco-friendly, is home produced and far more affordable, while it contains none of the voids or knots which have historically weakened plywood. West Fraser’s SterlingOSB Zero OSB3, for example, is BBA-certified, as well as approved for load bearing in humid conditions – being manufactured to EN300 and EN 13986. The latest boards offer an exceptionally smooth surface, making it an ideal substrate which is easy to work with.
uk.westfraser.com New addition to the JJI-Joist product range HBD08_West Fraser_Structural Elements - Structural
Timber_Edit.indd 1 02/08/2023 16:50
James Jones & Sons Ltd has announced the addition of a new product – the JJI Wall Stud. The JJI Wall Stud offers a low carbon solution to the UK and European construction market. Angus Macfarlane, General Manager of Timber Systems Division, said: “The JJI Wall Stud has been developed to complement changes in Part L legislation that
requires more efficient insulation in timber frame and modular homes. More than ever there is a need for highly insulated, healthy homes and the JJI Wall Stud, in combination with different types of insulation, helps achieve this. We will manufacture the JJI Wall Stud in easy to handle and easy to cut lengths to offer flexibility to the off-site manufacturing process.”
01324 562 241
www.jamesjones.co.uk WWW.HBDONLINE.CO.UK HBD08_James Jones_Structural Elements - Structural
Timber_PR.indd 1 27/07/2023 10:49
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