This is a spin off from an other topic. I was wondering what size blocking folks are using? 4x4's, 6x6s' or 8x8's, maybe a combination. What species of wood, hard, soft, pine, spruce, cedar? Hard wood seems a bit heavy to handle in vast amounts, or is it required in some sitituations? How about lengths? Durability, if it sits around will it rot? I know it does, what can be done to help slow it down? Tim