The question of whether it’s better to block between two joists or one joist and the wall is a common one among home owners. There are many factors involved in deciding which method to use. You have to consider the type of house, its construction, and other design features. In most cases, blocking between two joists is better than blocking between a joist and the wall. For example, many English Tudor-styled houses were built with a fairly narrow spacing between the interior wall and the outer structural wall. Blocking between two joists gives more support to the ceiling. If you’re blocking between one joist and the wall, install a second horizontal beam for additional support. How far apart should deck blocking be? This type of construction can cause problems when blocking between the two walls, as there may not be enough room to fit a piece of wood all the way across the gap. Blocking between the two walls in this case would require eliminating the gap between the walls and the interior wall. This may not be feasible for a number of reasons.
When you build a deck, you may decide to use blocking between joists to help support the floor of the deck. Blocking helps to keep the joists from bowing and provides more support for the deck flooring. The size and thickness of the blocking also helps to keep the deck from bowing or twisting. You can make your own blocking by cutting pieces of 2-by-6 lumber to fit between the joists. How far apart should deck blocking be placed? The most common distance is 16 inches o.c.
(on center). You can place the blocking every 24 inches if you prefer. This gives the deck more support and makes the floor stronger.
When you build a deck, you should always install blocking between the joists to help support the deck and keep it from bowing or twisting. If your joists are 2x6s or larger, you can use them for blocking. If your joists are 2x4s, you’ll need to add pieces of lumber to serve as blocking. Most building codes require that you install blocking that’s at least 2 inches x 4 inches, so your joists are always strong enough to support the weight of people and objects on the deck. Blocking between the joists helps to keep them from bowing.
You should always add blocking between the joists when you build a deck. This helps to keep the joists from bowing and provides more support for the deck flooring. In this article, we will discuss the placement of blocking between the joists.
You will need to choose how far apart you want to place the blocking. Many people use 16″ on center, which means that you space the blocking pieces that are laid between the joists 16″ apart. Others choose to use 24″ on center, which means that you space the blocking pieces every 24″ apart. You must choose how far apart you want to place the blocking when building a deck.
You will need to cut pieces of 2×6 lumber for the blocking. Make sure that the lumber is long enough to reach between the two joists that are closest to each other. Use a circular saw to make the cuts.
Use a nail gun to fasten the blocking pieces in place between the joists. If the joists are 16″ on center, the nails should be placed 2″ in from the ends of the blocking pieces and 4″ in from the sides of the blocking pieces. If the joists are 24″ on center, the nails should be placed 1 1/2″ in from each end of the blocking pieces and 3″ in from the sides of the blocking pieces.
Make sure that the bottom of the blocking pieces fits tightly between the two joists. If it does not, tap it into place using a hammer. Check to make sure that the blocking is firmly in place before continuing.
Continue adding blocking pieces until you reach the other side of the joists. This will complete your deck.
Tips & Warnings
If your joists are 2x4s, you may want to place pieces of lumber 16″ and 24″ long. This will give your deck more support than you get by using just pieces that are 16″ or 24″ long.
If you want your deck to be really strong, you can double up on the blocking. This means that you would use a piece that is 32″ long to fill the space between two adjacent joists. You would then place a piece of blocking that is 24″ long between the joists on the opposite side. You can use this method anywhere that you are using shorter blocking pieces.
You can also double up on the blocking at each end of your deck. This will help the deck to resist bowing and bending better.
If your blocking protrudes out from between the joists more than 1/2″, you may want to trim it back so that it sits within the 1 1/2″ area that is allowed by building codes. Most people choose to trim the blocking back so that it is flush with the side of the joists. This makes the deck surface smoother and prevents people from tripping on protruding nails.
Use a string to check the levelness of your joists before installing the blocking. If the deck is not level, it can make the deck unusable and it can shorten the life of the deck.
When choosing how far apart to space your blocking, you must also consider the width of the decking boards that you will be using. If you choose to use 1″x6″ decking boards, they will be 6″ wide. This means that if you choose to place your blocking every 16″
Sources & references used in this article:
- Green water overtopping analyzed with a SPH model (M Gómez-Gesteira, D Cerqueiro, C Crespo… – Ocean …, 2005 – Elsevier)
- Surgical instrument incorporating EAP blocking lockout mechanism (BA Barker – 2017 – Cool Springs Press)
- Scripts and legends in families and family therapy (FE Shelton IV, EL Timperman – US Patent 7,143,925, 2006 – Google Patents)
- Scripts in memory for text (J BYNG‐HALL – Family process, 1988 – Wiley Online Library)
- Paint blocking in Ford’s in-line vehicle sequencing environment (GH Bower, JB Black, TJ Turner – Cognitive psychology, 1979 – Elsevier)