Is there such a thing as 5/4 pressure treat lumber? I need some for a outside project and it needs to be 5/4 x 8 but I cant seem to find anything like that in 5/4. I thought I could use pressure treated decking but can only find it 5/4 x 6 which is to small. It will be used to make garden harps for a historical site. They had some made from standard 5/4 but they didnt hold up well to the weather. Or, is there another choice in 5/4 that would hold up in the bad weather. Thanks.