Do I need pressure treated wood?
I'm building a bridge no wood is going in the ground it's gonna be supported by concrete blocks. From what I read pressure treated wood only protects against rot it does nothing for water heat other elements.
I'm building a bridge no wood is going in the ground it's gonna be supported by concrete blocks. From what I read pressure treated wood only protects against rot it does nothing for water heat other elements.
Spock (rhp)
you need PT wood. Or else anti-water and termite wood like redwood or cypress. Ordinary wood will not resist rain and the resulting damp well, nor termites
M Johnson
Rot is not exclusive to buried applications, so I would treat the structural wood with copper napthanate if you decide against pressure treated. Especially at the cut.ends.
Anonymous
No it doesn’t need to be treated lumber, it could be cedar, redwood, teak, white oak, cypress or even mahogany. These all do very well exposed to the elements but pressure treated lumber is much more affordable
Where the boards touch the concrete supports would be considered ground contact.
princess pounder
Yes, Treated wood lasts 4 times longer outside in the weather than untreated wood.
Anonymous
I wouldn't use anything else, but obviously it is up to you. Most wood is fast grown and not at all durable unless pressure treated, and you still need to treat cut surfaces and ends.