CCA treated timber

[EC]

Hey experts,

What is CCA Treated timber?
Actually, what kinds of timber are CCA treated?

Where can I find it with 4m long?

It should pass AS1604, with H4 grade and with reasonable price.

Thanks for your kind assistance.

The setup of this forum do help idiots in this aspect like me!!  

Regards,
Edith  

[swampwhiteoak]

What is CCA Treated timber?

CCA stands for chromium copper arsenate.  It's a preservative that is pressure applied to wood.

Actually, what kinds of timber are CCA treated?

As far as I know, mostly southern yellow pine.  It is designed to be used in outdoor situations so posts, landscape timbers, and porch decking lumber are the most usual types.

I'm not sure what the rest of your post means, so wait and someone will come along more knowledgable than me.

[Don P]

In the Black Hills and in MT we were getting ponderosa pine CCA but the posts and biger stuff had to be incised to get the retentions required in the less permeable ponderosa.
10 years ago there was a brisk market in "sunwood" out there a brown(iron oxide?) wood, they said it wasn't good enough for the moisture we have back east.
There has been some hype over the chemicals in the last year or so.But it is disturbing the market. There is a newer treatment , I think Copper Azide, not sure will try to find it.
Edith, what do you do?

[Don P]

Ooops I was thinking of copper boron azole...but that was the wrong treating chemical. The one getting press recently as a replacement for CCA is ACQ by Chemical Specialties in Charlotte, NC
http://www.treatedwood.com/

This is a pic of an incising machine
(its from the Wood Handbook, they have a section on treating)