Types of Oak Truss Design
King Post Truss
A classic functional oak truss
- The king post is the large central post running vertically up to form the apex of the truss, it can incorporate weight bearing struts or not.
- The tie beam carries the weight transferred by the king post easily as it is working under tension.
- Often employed at the gable end of the building where cladding or glazing is to be installed or where it is unlikely that a second floor would be required.
Queen Post Truss
- Queens posts trusses have a pair of symmetrical posts on either side of the truss linking the principal rafter to the tie beam. Often these are positioned in-line with a purlin run to transfer the load down to the tie beam.
- They can be used with or without a king post or collar.
- Queen posts are traditionally curved, but this is not compulsory.
- Queens positioned towards the outside of the truss will create the perfect opportunity for usable space in the attic.
Half or Mono Truss
- As the name suggests this is one side of the truss.
- Often incorporating half the king and queen posts if the span requires it, or that style is desired.
- Half trusses are used for lean-to style extensions or garden rooms.
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