Looking for structural timber strength data.
 

Hi,

Can anybody recommend a handbook or web resource where I can find strength
data for structural timber.

I'm specifically looking for loading recommendations for posts (ie
supporting the roof of a verandah)....and variances between different
materials (eg Pine/Oak).

david

Vortex wrote:
Hi,

Can anybody recommend a handbook or web resource where I can find strength
data for structural timber.

I'm specifically looking for loading recommendations for posts (ie
supporting the roof of a verandah)....and variances between different
materials (eg Pine/Oak).

david

sagulator is good for horizontal timber, but not uprights.

NT

The trouble with the strength tables is they require a bit of
experience on the part of the timber grader. Two pieces of the the
same kind of wood may have very different strengths because of knots
and other defects. Since you are building a verandah rather than a
multistorey carpark just use a bit of common sence and err on the side
of overkill. I built a verandah recently with 6 inch square oak posts.
Plenty of overkill there but green oak only cost =A315 per cubic foot
and big post look nice. I expect posts of a quarter the crossectional
area (3 x 3 inch) would have been more than adequate. Pine is more
likely to rot at the bottom end than oak. Larch, Douglas fir and cedar
are the more durable softwoods.

Just do a Google search for "joist span tables" or just "span tables" wood.
There's quite a few, mainly American based. Here's one URL below...

http://www.raisedfloorliving.com/spantables-2.shtml


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"Vortex" wrote in message
...
Hi,

Can anybody recommend a handbook or web resource where I can find strength
data for structural timber.

I'm specifically looking for loading recommendations for posts (ie
supporting the roof of a verandah)....and variances between different
materials (eg Pine/Oak).

david


I think these sites provide that type of info'

http://www.hometips.com/hyhw/structure/structure1.html

and

http://www.diydoctor.org.uk/projects...ring_walls.htm

Vortex wrote:

Hi,

Can anybody recommend a handbook or web resource where I can find strength
data for structural timber.

I'm specifically looking for loading recommendations for posts (ie
supporting the roof of a verandah)....and variances between different
materials (eg Pine/Oak).

Loads of info on all sorts of materials he

http://www.amazon.co.uk/exec/obidos/...ternodeltdcomp

The demo version of superbeam will do what you want as well (even though
you need the full version to print results etc) - this is the
applications used by many architects etc for doing structural calcs. It
is pre loaded with a good selection of common constructional timber data:

http://www.sda.co.uk/sbw.htm

Very nice bit of software, although you still need the basic background
information to get sensible results out of it.

(not a fan of the sagulator mentioned elsewhere since it seems to give
answers that are significantly out!)

--
Cheers,

John.

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