Thread: BARAP roof trusses
9th Dec 2004, 04:40 PM #1
BARAP roof trusses
Does anyone know what BARAP roof trusses are? I'm looking at a house that has this kind of roof construction. I vaguely understand the construction of a normal cut roof, but I have never heard of this kind of structure before.
My second question is then about the load bearing characteristics of the roof. If it is a truss, does that mean that the internal walls are not loadbearing?
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9th Dec 2004, 05:01 PM #2
I suggest you search on google for barrup truss.
I think it uses cables.no-one said on their death bed I wish I spent more time in the office!
9th Dec 2004, 05:02 PM #3
Each beam running perpendicular to the trusses includes a barrup truss which is made up of a strut and cable made of cast-iron on the underside. This works by placing the cables in tension, causing the strut to be in compression and creating an upward force in the middle of the beam, in effect creating a extra support in the centre of the beam. This enables a minimal section beam to span further or a beam section to be reduced for the same span.no-one said on their death bed I wish I spent more time in the office!
9th Dec 2004, 05:14 PM #4Originally Posted by jackiew
9th Dec 2004, 05:17 PM #5
Most roofs with a barrups in them will be the old stick built type ( built on site ), so there will be some internal walls that are load bearing.
9th Dec 2004, 06:03 PM #6
Barrups or bressumers were commonly used in a traditional cut and pitched roof where the floor plan was designed with no consideration for supporting the roof. (No wall conveniently located to carry a prop to an underpurlin.)
With the advent of customers wanting large living/family/kitchen areas, it was often necessary to beef up some of the main roof members. Usually the underpurlins and the hip rafters.
Lower pitched roofs were also becoming common and there was often insufficient space to fit a heavy strutting beam.
Barreps have become relatively rare now, because of the extensive use of factory manufactured roof trusses.
If you look in your roof space you should be able to figure out where the greatest roof loads are concentrated. Take great care if you are thinking of altering a section of wall carying heaps of load. (Especially if you have a tiled roof.)Ian
10th Dec 2004, 07:05 AM #7Originally Posted by ozwinnerno-one said on their death bed I wish I spent more time in the office!
10th Dec 2004, 07:52 AM #8
thanks all. Moral to this story is to get up in the roof and have a look
Have a good weekend.