![]() ![]() ![]() Which direction are your cross joists?Īs you’ll see in examples below, the direction of your cross joists can have a significant impact on the number of deck blocks you’ll require. In general, composite boards require closer joist centres (to remove ‘bounce’), whereas hardwood boards can be further apart.Īdditionally, local building codes may have specific requirements for the spacing of deck joists, so it is important to check with your local building department to ensure that your deck is built in compliance with all applicable codes. However, it is always best to consult the specific installation instructions for the decking material you are using to ensure that the joists are spaced correctly. In general, joists for a deck should be spaced 16 inches on center for rectangular decks and 12 inches on center for diagonal decks. The spacing of the joists will depend on the type and thickness of the deck board material you are using, as well as the design and load requirements of the deck. Check your local span tables to find out what is required by code. It’s generally recommended that 2圆 or thicker be used for a sturdy deck. ![]() The thicker your lumber, the further apart your span supports can be. The size of lumber will determine what your spans will be. This one is pretty self-explanatory, but some decks may have multiple corners or curved edges which affects the number of deck blocks required. Is your project raised or is it a ground level deck?.What are the dimensions of your project?.The kind of soil surrounding the deck determines how supported it is, and absolutely informs the style of deck footing required.Before we delve into any specifics, let’s first cover the main factors that affect our calculations: But if you live in the mountains, you may be forced to contend with rocky soil. What kind of soil surrounds the deck? If you live in, for instance, a beachy area, you might be plagued by soft, sandy ground.If you wish to install a heavy bar or hot tub, consider using the strongest foundation or footing you can install. What do you plan to house on the deck? When planning a footing or foundation material for the deck, it’s important to consider what will likely sit on the deck.When the deck is attached to a home it benefits from the strong foundation the home itself already has. Will the deck be attached to the home or another permanent structure? Whether the deck is attached or floating is a big determining factor in what kind of footing and foundation is required.How large will the deck be? Even if the deck is mere inches off the ground, a large deck will require a sturdier foundation than a small one, namely because it will likely carry more weight and have more space between posts.How high from the ground is the deck? If the deck will be positioned off the second floor, or even on a side of the house that’s further off the ground, there will be more space between the footing and the decking surface, increasing the stability required for the foundation.For instance, a steep slope will require stronger footing on where posts are taller. What is the slope of the property? The slope of the property determines how much hold a foundation must give.But there are many factors to consider when choosing a footing or foundation material and style. Without such, the deck is liable to shift, move, and even collapse. What To Consider When Choosing A Deck FootingĪ strong foundation is essential to the durability of any structure, and decking is certainly not excluded from this rule. Lighted Magnifying Glass That Stays Put.Best Lawn Care Service for Service Dogs.
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