PA hayseed
Platinum Member
For feathers and wedges, or other places call them other names, you are going to have to go bigger than you think. I used 3/4 on stuff that I square up that is only 2' thick. Call trow and holden or google them. They will tell you approximately what size you will need. They do boulders for a living. I bought at least two sets off them in the 3/4 and 5/8 size. Depending on the width, you may need more than one set to get across it.