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Understanding Low Pitch Roof Truss Design
Understanding Low Pitch Roof Truss Design

There are three factors that most affect the strength of low pitch trusses: pitch, span and wind speed.

Combine these three at their most extreme, i.e. low pitch, large span and high wind speeds, and this is where you’ll find a truss ‘working’ the hardest. I design trusses for many roofs around NZ that have these characteristics, your typical 5 degree longrun roof spanning over the lounge & dining rooms.

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Cove Truss Design Tips
Cove Truss Design Tips

Here are a few ideas to consider when incorporating cove trusses in your next building.

Top chord cove trusses are a commonly used design feature in many kiwi homes, particularly where the building heights are affected by proximity to the boundary. Bottom chord coves are less prevalent, but are handy where box gutters are used.

Cove distance

Where possible, it is best to keep the cove distance as short as possible. 400 to 600mm is an optimal distance for most cove truss designs.

Roof Pitch

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Truss Design for Additions/Alterations
Truss Design for Additions/Alterations

House alterations and additions have proved popular over the past couple of years, and we have seen many plans where girder trusses are incorporated in the roof.

 

 

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Internal Loadbearing Walls
Internal Loadbearing Walls

Internal loadbearing walls supporting trusses can have quite a big impact on the design of a roof, so let's look at a few of the key considerations here.

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Designing Trusses, Lintels and Tie-Downs
Designing Trusses, Lintels and Tie-Downs

In this post, let's look at the interaction between trusses, the lintels that support them, and the tie-downs for these lintels. 

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What Information is Needed to Get a Truss PS1?
What Information is Needed to Get a Truss PS1?

In this blog post, I'll discuss some of the key pieces of information that truss designers look for when creating a truss design PS1.

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Cantilevered Trusses
Cantilevered Trusses

Considerations when incorporating a cantilever in your roof.

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