Large Cart Lodge
This cart lodge had been approved by planning before we were able to have any input. So we looked at how an oak frame could be incorporated into the approved design. Within these visual constraints we refined a simple design that satisfied both the requirements of both the client and structural engineer:
To the left on the above image is a utility space, to the right a triple workshop/garage and office space above. The green elements on the drawings here represent softwood rafters, whereas the beige elements represent the oak frame.
From the front; an open car port to the left with feature beams and loft space above. To the right, double garage doors and utility space. The space within the garage has a raised ceiling in order to facilitate a vehicle lift.
From these representative isometric drawings we produce workshop drawings that are then passed to a structural engineer for approval. Like this: Old.Cart.Lodge.COtf.Final3 Once approved, any refinements are added to the design and we make a start in the workshop. The following two images were taken during manufatcure.
Above: One of the main cross-frames.
Above: Half of the clasp purlin roof frame.
We decided upon a clasp purlin design roof as it’s basically our favourite and an elegant roof truss design. To expand on this a little we also ‘tweaked’ the traditional design in order to show as much timber as possible; With a clasp purlin roof the rafter typically is reduced to half its depth above the collar height. This means when the common rafters sit on the back of the purlin the effective finish interior plaster board covers the upper section of the oak rafter. So what we have done is increase the purlin depth by 50mm and house the upper face into the belly of the primary rafter, effectively pushing the finished plasterboard back and exposing the oak. If you are not confused by now, you should be! This illustration may help…
When the individual sections have been made, they are then packed and taken to site – just under 9 tons of oak in this job! In just three days we have the frame and softwood trusses assembled. Pictures here courtesy of Matt D from the cab of the JCB…
It’s quite hard to see, but the following picture is the open car port section with feature beams. When it has been finished, just oak will be visible from beneath.
Actually, just found this picture which is better…
And the large office space above the workshops:
Unbelievably the structural engineer thought the cross-rail timbers ought to be bigger to support the upper floor, so we introduced some heavy duty curved braces to reduce the span.
Finally the overall effect, before being ruined with tiles, cladding etc… 🙂