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G'day,
Simple question from a novice...The engineer says 250UB37.3 (spanning 6m, supported at the ends) "to be supported on triple timber studs." So how should the studs be placed? Side by side or in line?
And this doesn't look like much to hold this thing up? Any advice gratefully received.
McFangus
I would say that the studs should joined together and it would be better if they were bolted together in a couple of places and then be nogged at the centre if 2400 high or in thirds if they are 2700mm high
Assuming your running with 90mm studs, I would be tempted to go with two 90x45s face to face for a 90x90 block, and a third 90x45 with a face to the seam of the pair. In this way, there is always a face bracing an edge and preventing it from flexing.
I would be worried about distributing three studs over maybe 250mm and nogging between them as all studs would have there thinnest dimension oriented the same way, (lower resistance to flex) and the structure would be difficult to brace adequately.
Maybe confirm with designer exactly what they mean.
that is a very vague documentation - supported on triple timber studs.
At the very least it should be " 3/90*45 mgp12 studs nail laminated. min. 30 mm end bearing of beam". [or whatever]
Generally there will be 3 studs under the beam - a 250UB37.3 has a flange width of 146mm - & then another stud either side for lateral support or trimmers either side of the beam with noggins at the bottom flange height or a plate under the beam to studs either side with the 3 load carrying studs under.
I thought it was a given that unless noted otherwise studs would be the same size and grade as used in the rest of the construction.Quote:
Originally Posted by ausdesign
Mick
With any point loads I would normally nominate the timbers separately for clarification, but yes Mick if the standard studs were say mgp10 & the studs supporting the ub were the same required strength then you could just nominate the size required.
I've just got into the habit of nominating size & stress grade for load points under beams, girder trusses etc.
Thanks for all the contributions:! :) I'm starting to get a picture. Studs are 90x45 mgp10. And if there are 3 under the beam and studs either side for lateral support should there be a bolt through side studs and UB?
Not necessarily [normally]. The bolt/s would have been detailed if required.
The studs would usually be nail laminated though to create a structural strength of 90*135 under the beam.
It means as triple laminated studs. That is joined to make a solid cross section of timber that would be 90mm x 135mm. They would only need to be nail laminated and have a noggin at half height on a wall less than 2700mm.