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Fw: Destructive and Non-Destructive Testing for Wood

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Try a stress wave timer.  It is a non-destructive device that basically
measures the velocity of sound in the wood.  They can be rented from
Metriguard (

Bruce Pooley
Timber Design

----- Original Message -----
From: "Bill Polhemus" <bpolhem(--nospam--at)>
To: <seaint(--nospam--at)>; <aec-residential(--nospam--at)>;
Sent: Saturday, October 07, 2000 8:21 AM
Subject: Destructive and Non-Destructive Testing for Wood

I have a project I'm looking at proposing. A local natural history
which provides outdoor classroom instruction for schoolchildren called me

Seems they have a wood observation platform which is supposed to handle
twenty people at a time, that sustained some damage a couple of years ago
when a
tree fell on it. The damage looks to be slight, but it does raise some
in my mind as to the strength of the wood members.

I have in mind to obtain some properties of the wood members, either my
non-destructive (preferably) tests, or even destructive means.

Does anyone have any experience with this? What sorts of tests are available
this purpose?

Thanks for any light shed.