As a designer and insruction on cca
Cca treated has been aroung for more than 60 years and when use as designed. It is very safe.
The new upgrades comming this year in 2003 will faze out some uses of cca treated wood in family uses. This may be a poor upgrade. We think cca is a very safe project. When used as a wood foundation, the product get better. Now treatment like acq will be used. Look out for the nails. Now you may only use the high cost stainless steel nails. more cost on more markup too. We will pay for this change with a lesser performing treatment.