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What Is The Strongest Roof Truss Design?

Trusses provide stronger, well-engineered rafters and joists, allowing easy joining into a unit. Prefabricated trusses have changed roof truss design and framing.


The truss is the roof’s frame, designed to provide support and strength. The arrangement of these bridges occurs at regular intervals above rooms. Spacing of the Longitudinal posts supports them. Their purpose is to ensure that the roof stays intact through their triangular wooden structures.


There are many variations of timber roof trusses from which to choose. They all have their strengths and benefits. So which roof truss design is the best and strongest option for your construction project?

What makes a strong roof truss design?

Well designed roof trusses make them stronger than any other arrangement of structural elements in your roof. That’s because they can stand huge forces of tension and compression. It matters what material you use. Timber, for example, is extremely strong when assembled into a prefabricated roof truss.


When roof trusses support a roof, it is both healthy and functional. That means a roof can properly reflect UV rays and ward off condensation and mould.

What are the different roof truss designs, and which is the strongest?

Different roof truss designs have various strengths. However, the one most appropriate for a particular application will be the strongest. Roof truss design has five basic categories: dropped chord, raised chord, parallel chord, raised heel and scissors.


Raised chord roof truss design

A raised chord is the most common roof truss design used in housing. It simplifies attic ventilation and leaves space above the exterior wall top plates for insulation. The benefits of raising the truss higher are twofold.


Dropped chord roof truss design

With the dropped chord, a conventional truss is topped with a second chord truss to minimise uplift. This type of truss creates a vapour barrier similar to the raised heel truss. Dropped chord designs also have great insulation properties. At the intersection of walls and ceilings, vapour barriers require additional blocking and siding. That can increase construction costs.

Parallel chords.

Due to the use of steel elements, the cost of this design is higher. However, it is aesthetically pleasing due to its parallel placement of elements. Because this design uses steel, there is thermal bridging, which makes it less energy efficient. High ceiling buildings use this because it is durable and reliable.

Raised heel

A raised heel is an excellent option when you are looking for an energy-efficient truss design. The arrangement of the elements of this truss design creates a vapour barrier. That eliminates condensation problems in humid areas. Due to the truss’ insulation, the cost increases, but the design protects the elements from the environment. Houses and buildings with attic space commonly use this design.


Vaulted ceilings often feature this design. As the trusses provide plenty of support, no bare beams are needed. The scissor roof truss gets its name from the way it slopes inward. The drawback of this design is that it’s difficult to insulate.


All truss designs provide a sturdy foundation for the roof. Moreover, trusses have been tested and improved for years so it all comes down to which option is best for your project.

If you would like to learn more about roof trusses and which solution is best for you contact us for a fast quote.


We can provide quotes, budgets, and advice. Contact us today on (02) 4351 2616 and speak to one of our experts. You can visit us at www.heydenframeandtruss.com.au, if you need additional information about our products and services.


We service the regions of Sydney, Gosford, Newcastle, Central Coast, and surrounding areas.

We supply and deliver all over Northern Sydney, Newcastle and the Central Coast.

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