How to use clamp blocks for post-installation on a deck. 🧰 Setting 6x6 Deck Posts Carrying and placing 6x6 deck posts alone can be a challenge, especially tall ones. One way to do it is to screw blocks to it as “handles.” A set of blocks toward the middle make carrying it easier than just muscling the post by its flat surfaces. A set near the shoulder cut at the top makes engaging clamps fast and easy. You can do this if you have posts supported on concrete footing tubes or concrete placed in t