Roof trusses provide an off-site manufactured structural framework, to support the roof coverings, ceilings and ﬂoors of buildings in both the domestic and commercial sectors. Our highly engineered products, manufactured in our state of the art factory, offer a huge range of beneﬁts. Using our 26 metre birch press, we have the ability to manufacture and deliver trusses up to 16 meters long. Our design team are always looking to save you valuable time on site and to keep your project cost effective. Incorporating high level designs, making sure your job goes smoothly and fits together seamlessly.
benefits of Roof trusses?
• SUITABLE FOR A WIDE RANGE OF ROOF STRUCTURES AND SHAPES
• CAN BE USED WITH MASONRY, TIMBER FRAME OR STEEl frAME CONSTRUCTION
• PREFABRICATED COMPONENTS MEAN REDUCED LABOUR COSTS
• SPEED OF CONSTRUCTION ALLOWS JUST-IN-TIME DELIVERY TO SITE
• MADE OF TIMBER, THE ONLY TRULY RENEWABLE BUILDING RESOURCE
• MINIMAL ENVIRONMENTAL IMPACT FOR MANUFACTURING AND INSTALLATION
• MANUFACTURED TO MEET THE REQUIREMENTS OF EUROCODE DESIGN
For normal roof spans, up to around 9m and larger spans with internal load bearing walls the truss members can be economically designed to carry domestic loading. For typical dormer windows, traditional purlins supported on multi-ply trusses carry the intermediate infilling over the dormer. The rafters and extension ceiling ties are nailed on, to form the flat roof over the dormer window.
For larger spans and those with intensive trimmed openings, latticed purlin beams are required. These are supported on end and transverse walls and provide maximum floor space.
Raised tie trusses allow the ceiling height to be increased without increasing the overall height of the building. Raising the ceiling cord above the wall plate, raised tie trusses are ideal for dormer roof designs and providing cottage style feature ceilings.
The design has evolved to reduce traditional infill at hipped ends to a minimum - thereby keeping site material and labour costs down. The main structural components consist of a multi-ply hip girder which supports the mono pitch trusses and hip rafters forming the hip.
Single hip girders are then used to infill up to the first full truss at the end of the ridge, generally at the same spacing as the full trusses for economic use of components. The mono-pitch trusses and the single hip girder trusses may be supplied with extended rafters for site fixing to the hip rafter.
Alternatively, the extension rafters may be omitted to allow for site fixing of loose, pre-cut jack rafters.
Truss shoes are used for supporting the mono pitch trusses on the hip
A fink truss is traditionally the most commonly used truss type, providing a simple, adaptable and cost-efficient design solution.
The webs in a fink truss form a ‘W’ to provide a high strength structure with good load-carrying capacity. Due to its design flexibility, fink trusses are the most frequently used truss in roof design. With a large variety of spans up to 14 metres and pitch range from 10° to 60°, the finks truss offers a cost effective and versatile roof solution.