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dpb[_3_] dpb[_3_] is offline
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Default Wide shelving advice needed

On 2/13/2020 9:36 AM, Leon wrote:
....

Again, I'm not saying plywood will sag less than solid wood when used
for shelving, I'm saying that plywood is stronger than like sized wood.


It's far more stable and the likelihood of splitting along the grain
(since there isn't any grain throughout) is insignificant in comparison,
yes. That's not "strength" per se, though.

http://charlespetersonflooring.com/wp-content/uploads/2014/04/chapter_12.pdf

Doug fir ply has MOR (modulus of rupture) of about 5-6 kpsi whereas
clear Doug-fir (12% moisture) is more like 12 kpsi.

As noted in the text for MOR the value is the accepted measurement but
the computation from measurements is based on limits of elastic region
and specimens will be/are deformed beyond such before they actually fail.

All not to deny that ply is a most suitable alternative for shelving;
particularly wide shelving than single wide board solid material, only
to be more precise in what it is that is measured/calculated...

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