The number of concrete footings needed for a floating deck will depend on the size and type of deck you are planning on constructing, as well as the design and soil conditions. Generally speaking, you need one footing for every four corners of your deck and one footing for every six to seven feet of the perimeter of your deck, plus an additional footing in the middle of the deck, if required.
The soil conditions will also affect the number and size of concrete footings needed. For instance, if you are building a deck on soil that is not even, such as on a hillside or around a tree, then you may need additional footings to keep the deck stable and level.
The configuration and type of deck will also determine the size and number of footings needed, as some decks may require larger or additional footings depending on the design. It is best to consult with an experienced local contractor or engineer to help determine the size, type, and number of footings needed for your floating deck, as this can vary greatly based on the particulars of your project.
How far apart do concrete deck blocks need to be?
Concrete deck blocks need to be set roughly 4 feet apart from the center of one to the center of the other, depending on the size of the deck. For decks measuring 20 feet by 20 feet, the blocks would need to be placed 8 feet apart along the deck perimeter and 4 feet apart for the interior support beams.
The distance between the edge of the block and the outer edge of the deck should be equal all the way around to ensure the structure is stable. Additionally, the blocks must be level and aligned properly in order to provide adequate support.
Depending on the size and design of the deck or project, additional blocks may be needed to increase stability and support.
How far apart should deck blocks be for floating deck?
The spacing between deck blocks for a floating deck should typically be no more than 24 inches (61 cm). This allows enough space for the joists to be supported without putting too much strain on the blocks.
Furthermore, the deck blocks should align on the same plane so that the joists are supported evenly across the length of the deck. When planning the spacing for your deck blocks, be sure to check local building code requirements as the requirements for floating decks may vary for deck size, spacing, and material used.
Additionally, when installing the blocks to support the deck, be sure to follow the manufacturer’s instructions for proper use.
Do I need deck blocks on every joist?
No, you do not need deck blocks on every joist. Deck Blocks are typically used to provide support at the corners of the frame, to level the deck frame, and to provide stability to the frame. If you lay out your joists properly, you don’t need deck blocks under every joist.
The blocks should be placed on either side of the corners and at the center of the deck if it is longer than 8 feet, and the ends of each joist should rest on the beams. It’s important to keep the joists properly spaced and to make sure they are level and square to reinforce the frame and prevent any potential problems.
You may need additional support if your deck frame is placed on grass, dirt, or an uneven surface.
Do I need gravel under deck blocks?
Yes, it is typically recommended that you use gravel under deck blocks to help ensure that the blocks are stable and secure. The gravel helps to even out the weight of the blocks, minimize moving or shifting, and provide a level surface on which to put the blocks.
Additionally, the gravel will help protect the blocks from moisture, which can cause shifting and can increase the risk of becoming unstable over time. Although the amount of gravel to use will depend on the size of the project, under each block you should use at least three inches of gravel, with the largest gravel pieces being no larger than two inches.
For larger projects, you may want to consider using an entire four-inch layer of gravel for better stability and support.
How do you space concrete deck blocks?
When spacing concrete deck blocks, it is important to ensure that they are adequately spaced apart in order to provide support for the deck and ensure that the structure is safe and stable. Generally, the blocks should be spaced approximately 12 to 16 inches apart.
However, in order to determine the exact spacing, the weight of the deck structure should be taken into consideration and the proper spacing based on the load should be determined. Once the load is determined, the blocks should be spaced equidistant from each other and properly secured with reinforcing rods or rebar.
It is also important to ensure that the blocks are level and undamaged before the deck is built. This will help to ensure that the deck is even and the structure will not be compromised.
Is blocking required on decks?
Yes, blocking is usually required on decks. This is necessary to ensure that the deck is stable and can support the weight of people, furniture, and other items that will be placed on the deck. Without proper blocking, the deck may not be able to handle the load and could potentially collapse.
The blocking is typically made out of wood and secured between the the joists in order to strengthen and create a solid foundation for the deck floor. Additionally, blocking helps to deter the possible growth of mold, rot, and insect infestation.
Blocking should be installed correctly and securely, so it is important to research local building codes and work with a qualified deck builder to ensure the deck is constructed correctly.
Does blocking increase joist span?
No, blocking does not increase joist span. Blocking is the horizontal or vertical part used in wood framing to strengthen joists and other structures that are connected. It does not affect the joist span.
The joist span is determined by the supporting structure and the size and weight capacity of the joist itself. To change the joist span, the size or type of joist used needs to be changed. Additionally, the size of the supporting structure can be altered to increase the span of the joist.
The addition of blocking can provide additional strength to the overall structure, but it does not extend the joist span.
Does a floating deck need footings?
Yes, a floating deck does need footings. While a floating deck may not be directly attached to your home, it still needs to be supported. The footings should be solid and level and provide adequate support.
To calculate the amount of footings you need, consider the size of your deck, the weight it will be able to bear, as well as the soil conditions near your home. You also need to make sure that the deck is properly stabilized with joists so that it will not shift or sag.
The footings must be deep enough so that frost heave does not disturb the deck’s position. If not, the deck can become uneven, leaving the boards vulnerable to cracking and splintering. Finally, you need to ensure that the footings are sunk deep into the ground and have secure anchors so that the deck doesn’t shift.
With the right footings and stabilization, your deck will be strong and secure.