How to Set Deck Posts in Concrete

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How to Set Deck Posts in Concrete
(Deck de Madeira image by CarlosNeto from

Setting deck posts in concrete is a fairly straightforward process that can be done over the course of a few hours if directions are followed. If you plan on building a deck on your own, the process of setting the deck posts is one of the most important steps. Deck posts need to be set in concrete to adequately and securely hold the weight it will be exposed to on a daily basis.

Skill level:

Things you need

  • Shovel
  • Wood fitting form
  • Cement mix
  • Wheelbarrow
  • Water
  • Concrete edging tool
  • Reinforcement bars
  • Galvanised 6-inch steel post base
  • Gravel
  • Wood deck post

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  1. 1

    Dig a footer trench approximately 2 feet wide and 4 feet deep using a shovel. Once the footer trench has been dug, place the wood fitting form into the centre of the hole, which you can purchase from a hardware store.

  2. 2

    Place cement mix into your wheelbarrow and pour water in to create the mix. Use your shovel to mix the ingredients until they reach a peanut butter-like consistency. Once the cement mix is complete, use your shovel to transfer the concrete from the wheelbarrow to the wood fitting form. Once the fitting form is filled half way, insert two pieces of reinforcement bar in an "X" shape. Continue adding concrete until the fitting is full.

  3. 3

    Push your anchor bolt into the centre of the fitting form. Use your concrete edging tool to smooth out the surface of the fitting form. Once the area is flat, place the galvanised 6-inch steel post base into the centre of the fitting form. Place the treated wood post into the steel post base and allow approximately 2 to 4 hours for the cement to dry.

  4. 4

    Backfill the area around the wood post with gravel to give added support to the post. Every 6 inches or so, pour soil over the gravel so the area is properly compacted. After an additional 6 inches, add more gravel on top of the soil. Continue this process until you reach ground level.

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