You're eyeing that perfect spot in the backyard for a new deck, or maybe a sturdy shed. You've seen those concrete blocks, the ones that look like they're designed to cradle a post. They're called deck blocks, and they're a popular choice for a reason: simplicity. But here's where things can get a little fuzzy for DIYers: how far apart should these blocks be? It's not just about eyeballing it; there's a bit of thoughtful planning involved.
Think of deck blocks as the feet of your structure. Just like you wouldn't stand on one leg, your deck or shed needs multiple points of support, and the spacing of those points is crucial. Too close, and you're using more blocks than you need, potentially overspending. Too far apart, and you risk a wobbly, unstable foundation that could sag or even fail over time. It’s a balancing act, really.
So, what dictates this spacing? A few things come into play. First, the size and weight of what you're building. A small, lightweight floating deck will have different requirements than a substantial shed. Then there's the material of your deck joists and beams – their strength and span capabilities are key. And, of course, the ground itself. Is it perfectly level, or are you working with a slope? The reference material hints at this, showing how blocks are used for everything from shed foundations to raised decks, even on uneven terrain.
Generally, for decks, you'll find recommendations that often revolve around spacing your blocks to support your joists at standard intervals, typically 16 or 24 inches on center. This aligns with common lumber sizes and framing practices. The idea is to distribute the load evenly. If your joists are 16 inches apart, you'll likely want a row of blocks supporting those joists at that spacing. But it's not just about the joists; you also need to consider the beams that the joists rest on. These beams need their own support, and the deck blocks provide that.
For sheds, the principles are similar, though the focus might be more on creating a level, solid base. You're looking to prevent ground moisture from affecting the shed's floor and to ensure the structure sits true. The reference material shows a lot of interest in using deck blocks for shed foundations, suggesting they're a go-to for many looking for a straightforward solution.
Calculating the exact number of blocks you'll need often involves a bit of math, but it boils down to figuring out the perimeter of your structure and then adding internal supports based on your framing plan. There are even online calculators that can help, taking some of the guesswork out of it. It’s about ensuring each block is doing its job effectively, supporting its share of the load without being overloaded.
Ultimately, getting the deck block spacing right is about building a foundation that's not just functional but also safe and long-lasting. It’s a detail that might seem minor, but it’s one of those unsung heroes that makes a big difference in the stability and longevity of your outdoor projects.
