purlins

asteyert · 3 Oct 2008

I am about to do a loft conversion the inner purlins are not the same distance from the ridge and one is lower than the other this will cause a problem with head height .The purlins are also in three sections each one about 12 feet in length and propped on the joints.I would like to change them while the tiles are off the roof . The joints on the new purlins will be moved to new locations over internal walls the maximum span will be 17 feet which is the best type of beam to use steel/wood or glulam

Thanks

noseall · 3 Oct 2008

use steel.

Softus · 3 Oct 2008

Flitch beam.

asteyert · 6 Oct 2008

Thanks for that Guys would it be possible to do with the roof in place if i don't change the tiles

noseall · 6 Oct 2008

asteyert said:
Thanks for that Guys would it be possible to do with the roof in place if i don't change the tiles

possibly yes.

access is the obvious consideration, though with a bit if wrestling steel can be fed in from a gable or hip end.

if there is any sag in the current rafters then it may be a bit tricky getting the new purlin to take this sag up. jacking can be a little dangerous.

do you have room to feed the new purlins in whilst the existing are still in place?

asteyert · 7 Oct 2008

yes but as the roof needs replacing i think it will be better to do it with the roof off

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purlins

asteyert

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Softus

asteyert

noseall

asteyert

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