Design your oak roof truss

Choose a truss, set the span and pitch, and see it in 3D. When you are happy, send it to us and we will reply with a quotation.

Tie beam0

Principal rafters0

King post0

Truss height0

Span between walls0

Length inside end walls0

Oak volume0

Size and shape

Span between the walls

Inside face to inside face of the walls the trusses sit on.

Bearing on each wall

How far the tie beam runs onto each wall, beyond the span.

Roof pitch

Number of trusses

Spacing between trusses

Centre to centre. Tell us if you would like a ridge and purlins between them.

Truss details

Fluted king post

Full width at the head and foot where the rafters and struts join it, slimmed 50 each side between.

Struts meet the rafters

Strut curve

0 is a straight strut. Curved struts are cut from a wider board.

Raised tie beam, with the rafters running down past it onto the walls

Tie beam above the wall tops

Tie beam curve

How far the tie arches up in the middle, top and bottom, up to 125. 0 is a straight tie. A curved tie is cut from a deeper board.

Ridge, purlins and walls

Ridge

Purlins each side

One end

Other end

The ridge and purlins run truss to truss. A gable wall stands one spacing beyond the end truss and they bed into it. A hipped end finishes half the span beyond the end truss, so the hips meet on that truss.

Oak wall plates on the side walls and any hipped end

Wall plate size

The tie beams are housed into the plates.

Timber sizes

Choose my own sizes

Tie beam width

Tie beam depth

Rafter and king post thickness

Rafter depth

King post width

Queen post width

Strut thickness

Strut depth

Ridge width

Ridge depth

Purlin width

Purlin depth

Hip rafter width

Hip rafter depth

Timber list staff only

Member	No.	Length	Section

Send us your design

Name

Email

Phone

Site postcode

Where did you hear about us?

Anything else we should know

I already have structural calculations from an engineer

Not sure how ordering works?

Our step by step guide explains the design, quotation and order process, and what's included in the price.

Read the guide

Many more styles and sizes...

We manufacture custom trusses and complete roof systems in solid or engineered oak, fir, glulam, KVH and CLS, with spans possible up to 11 metres across a wide range of configurations, including raised tie, loft, restricted height and scissor trusses.

All components are designed using 3D CAD/CAM for millimetre-accurate CNC manufacture and supplied as coordinated packs for efficient site assembly. For more inspiration, explore the Roofs & Trusses gallery on our main website.

See more examples

The technical stuff...

Our configurator tool is intended as a first step to help you visualise your requirements and get a fast-track price for your project.

Trusses are structural, so it’s important to get them right. Please read our guide to the technical aspects of truss design.

If you need a second opinion, your builder or engineer can advise - or you’re welcome to call us and talk it through.

Find out more...

Assembly & delivery

As a rule we supply trusses in kit form to be assembled on site. Prior to delivery it's important to ensure transport vehicles have good access to your building site. You or your contractor will also need to arrange suitable lifting equipment to move the structures to their final location.

However, if you require the truss to be supplied assembled before transportation to site, so that it can be lifted straight into place by crane, this can be arranged for an extra cost.

Oakmasters does not offer installation services. You will need to find your own independent building contractor for all general building work such as groundworks, foundations, wall building, roofing, services, insulation, rendering and any other construction work.

With that said - we are here to help and would be delighted to advise and assist you with any step of the process.

Ask for advice