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Installing Post Bases on Concrete Footings

3:02
18:31
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Most Decks Are Over Complicated. (Do This, It's Easier)

What happens here

After digging, concrete footings are in place (likely poured previously into Sonotubes, though not explicitly shown in detail). The builder over-engineered by installing 5 footings when only 3 were required for a 30-foot span. Using a hammer drill, drill holes into the concrete footings. Secure the post bases (like Simpson Strong-Tie ABW44Z) to the concrete using 5/8 inch lag bolts. Use a piece of 4x4 lumber to temporarily fit into the post base and determine the exact height needed from the top of the footing to the desired ledger board height. This helps ensure the posts will be cut to the correct length. Pre-drill the holes for the lag bolts using an impact driver for a secure fit.

Goal: Secure post bases to the concrete footings

Tools and materials

  • 4x4 Lumber Block — Testing the fit of post bases and determining post height
  • 5/8 inch Lag Bolts — Securing post bases to concrete
  • Hammer Drill Ryobi — Drilling holes into concrete footings
  • Impact Driver Ryobi — Driving lag bolts into concrete
  • Post Bases Simpson Strong-Tie ABW44Z — Connecting posts to concrete footings
  • Tape Measure — Measuring post height
  • Concrete Footings — Providing a stable foundation for the deck posts

What they say

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a day. Well, we screwed up on something. I took full responsibility. Let me show you. We got our footings, which we went way overboard with how many we got. We only needed actually three and we went with five just to just to make up for all the crazy snowfall here. They are the appropriate depth. They're appropriate width. However, our alignment is a little jacked up. Uh, this one's perfect. The rest of them are kind of sitting on the edge. Now, typically I'd be concerned for this, but because of the excess amount of footings that we have, it'll be just fine. Let's drill our anchor. Typically, I love to set my anchors right when the concrete footings are poured, just cuz it's so much easier to do. But, in this situation, 5/8 lag bolts, anchor bolts are going down. Fancy, beautiful black hardware. But what I like about this one, it actually has a cap. So your posts are not actually sitting on the the nut that's sitting on top of this thing. It's sitting on a nice flat surface, which I think gives it added stability. [Music] Have our temporary ledger that's leveled right now. So we're working with our finished height for the floor joist. We have the distance from the base to the top 28 and 1/4, but we're going to have a 9 1/2 in beam uh and another 9 and 1/2 uh rafters that are pressuret treated. So to make our life easier, it's 19 put together. So we take this overall height, subtract 19, we come out with nine and a quarter, I believe. Throw this sucker in here, throw some legs all the way across, bring our beam on, and then we should be able to keep moving forward. [Music] We got our first post on and we have our last post on. And to make our life easier, we got a nice top line going across so we know exactly that elevation of post that we need to create. All the simple things to help make your life a little bit easier. You know you're growing up when you're excited about building a deck. Increasing the equity in your home. That's sexy.

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