Long-Span Roofs: The Best Choice for Your Home

Are you looking to renovate your roofs? If so, you should know that roofs with a span of more than 12 metres are likely to be known as long-span roofs. It is possible to create interior spaces free of columns using these roofs. They can also reduce the costs of the substructure and the duration of production. Besides, they can be found on a wide range of construction types, including: 

  • Plants for manufacturing 
  • Warehouses 
  • Structures used for farming 
  • Buildings used to store aircraft 
  • Workshops 
  • Governmental buildings 
  • Gymnasiums and Auditoriums 

Long span roofs serve a similar purpose to traditional shelters. They are designed to keep the contents of a building safe from the elements. This reduces fire risk and provides thermal and sound insulation. Due to their role in supporting access routes and building services and lifting equipment and electrical systems may be the primary structural system for the building roofing contractor Perth


In general, long-span roofs come in a variety of materials. Various materials may be used to make these, such as aluminium alloy, steel, bolstered and precast concrete, and wood. Aluminium extrusion is frequently chosen because of its exceptional sturdiness. On the other hand, steel is preferred because it prevents fires from spreading. BS EN 1993, BS 5950, or BS 94 are commonly used to design long-span metal and steel-concrete composite columns. 

Entrance Framing

Here, two columns hold a light or rafter at each end of a portal frame. And, any warping movement is shifted to the columns due to the “rigid” connecting joints between the columns and beams. Meanwhile, the beam can be reduced in sectional size to cover large distances.

It is made rigid by attaching a bracket, a backside, or by deepening this same segment where the tendons meet the joint between the beam and the section. As such, glulam is a term used to describe portal frames made of reinforced precast, steel, or wood laminate. 

Truss Pitched at an Angle 

A pitched truss is formed with a triangulated plane frame with appropriate centres. A tie member is used to attach the beams that make up the truss’s top edge at their bases to limit its spreading. Struts and ties attach the grounds in a basic triangle, and roofing purlins are installed between the trusses. 

Pitched trusses help to ensure that rainwater drains away from the building. It’s also because of their shape that they allow for a lot of natural light to spread throughout the building. 

Steel sections are commonly used to build pitched trusses. Bolts or welds secure them to gusset plates, which are cast plates used to join them together. Meanwhile, angled sections of steel truss are the norm, while their low cost and capacity to endure compressive strength and compression forces are the main reasons for this. In addition to bolts and timber connectors, timber segments can also construct a structure. 

Deck of Space 

An architectural roofing system called a “space deck” consists of simple pyramidal units that can be assembled in many ways. Tube diagonals are commonly used in the construction of these products. Finally, the forming tray and the apex boss are joined together through welding. Clear spans of up to 22 m can be achieved with single-span designs, while two-way spans can cater to close to 33 m. 

You can transport a span deck’s components quickly to the worksite. They are assembled into beams once they arrive at their destination. The space roof is then constructed at ground level before hoisting at the top of perimeter supports. Roof coatings can be applied to any lightweight architectural decking. Moreover, you can add roof lights to the deck sections with square tops. 

Structures Made of Fabric 

Structured fabrics such as PVC polyester and PTFE glass are highly durable. They also can span long distances with a minimal amount of material. They’re usually held in place if they don’t have bracing structures, cables, or pressurised air. And typically, residential and commercial roofing is translucent in colour, allowing for a good amount of natural light to pass through them. 

Author name- Adams

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