What Size Are Floor Joists In Residential Construction

What Size Are Floor Joists In Residential Construction?

Common sense tells you that huge floor planks can carry more weight. Also, spacing joists that are joint closely also enhances the load-bearing ability of a floor. But bigger is not often better when builders are building a home or doing a room addition.

When a builder frames a floor with 2 x 10 joists instead of 2 x 12, the additional two inches of vertical distance can be absolutely important, for instance. Therefore, the hard thing for builders is to select suitable joists for the load they hold while maximizing the area.

How Size Floor Joists In Residential Construction Is Affected?

A question always arises that what size are floor joists in residential construction. In this article, we will tell you all the details. Figuring out the load capabilities and choosing the spacing and right sizes of the floor joist is a complicated task. It is even more important than you might guess since there are several variables at play:

  • Wood species.
  • Grade of the lumber.
  • Thickness and width of the boards.
  • Spacing between joists.
  • The burden was placed on the floor.
  • The length that the joists span.

Wood Species

Various kinds of wood differ in resistance and stiffness to bending, with few species being way stronger than others. Even within the same kind of species, there is a great difference in their strength. It depends on the growing circumstances of the tree.

The wood from areas that grow slower and have more growth of end grain rings per inch. Both of these are much denser and stronger than the trees that grow faster of the same species.

Grade Of The Lumber

One more aspect of lumber joists is the wood quality that is being used. All wood manufactured for commercial sale is classified. The highest class – preferred – is generally free of any knots, blemishes, and other deformities that can make the lumber weak. Going for lumber can bear a good amount of loads.

After choosing a class, lumber carries a class of either 1,2, or 3. Lumber classified as one is of higher quality as compared to 2 or 3, and so on. Joist duration tables comprise maximum span lengths for all four classes for each variety of lumber.

Suppose you are not clear as to the class of lumber you are buying. There must be both a black tag attached to the lumber indicating the class and a white stamp on the wood itself with the class and species.

Size of Lumber (Thickness and Width of the Board)

The board’s width is a vital component in deducing the length a floor joist can span, playing a way bigger role than the thickness.

For instance, if you double the number of joists or thicknesses on a floor, the extent the boards can stretch will enhance by nearly 25%. But if you double the board’s width, the extent to which the joists can stretch increases around 80% to 100%. Though, you’re utilizing similar board feet of lumber.

Proper Spacing Between Joists

Like the joist size, the building code for your structure will specify the adequate gap between floor joists. The code itself is specified by the engineering laws of a specific building. Generally, floor planks have a spacing of 16 inches apart in the center. It means from the center of one also, with some buildings, floor shafts must be 12 or 24 inches distant in the center.

Are Floor Joists Load-Bearing?

Yeah, the floor joists must be weight-bearing. They act as the backing for the upper grades, constantly shifting weight to the vertical supports of the foundation. Though, when it gets to the upper levels, the floor shaft supports the walls.

Accordingly, the walls give support to the next floor. Yet, if a wall is positioned parallel to the planks, it isn’t weight-bearing. Only those walls which are placed upright to the floor joists can be weight-bearing.

But what you should know is that floor joists carry the burden of the whole house. While walls normally only carry part of the load, with a few not carrying any load at all. Floor joists are significant for this specific reason alone.

Joist Span

Formulating all these aspects jointly provides the minimum size joists required for several kinds of

  • Lumber.
  • Grades of lumber.
  • Sizes of boards.
  • Spacing of joists.
  • And the load that will be placed on the floor.

You also need to evaluate the code of your local building before you start construction. Also, discuss it with a structural engineer in rare or severe circumstances.

Can I Repair Floor Joist Myself?

Generally, a professional should do floor joist repairs. It is the structural quality of your whole residence. You can not put it at risk. Therefore, it requires it to be performed by somebody with knowledge and understanding of floor joists.

For easy repairing of floor joists, you should consider utilizing a flitch plate. A flitch plate is a delicate piece of plywood or steel attached to a weak joist to give support. Though, another alternative is to use a similar board and ensure it to the old one.

You can still leave the old board because the new board is only there to carry it in place. It will become the new weight-bearing board in the place. Nothing is risked, and you don’t need to do any compromise.


The size of your floor joists relies on numerous factors. Besides, just staring at your joists and determining they are too little is not a reasonable way to know the usefulness of your joists. You need to know all the factors that define the span length of the joist to evaluate your joints.

If you are constructing a new house, your house’s proposal will be stamped by an engineer. Then, your joists will be measured appropriately. But if you are constructing an addition yourself or any other structure, you must follow the joist span tables in the IRC.

Keep in mind that failure to measure floor joists accurately can result in vibration, wobble, and even full failure. Talk with a professional before you construct. Also, you need to understand that overbuilding is anyway better than underbuilding. We hope that your search of “what size are floor joists in residential construction” will end up here!

What To Consider When Remodeling A Kitchen

What To Consider When Remodeling A Kitchen?

Everyone wishes to spruce up and transform their kitchens with a remodel project. A remodeling project is needed when you feel bored with the current look of your kitchen. It is intimidating to start with a remodeling project especially when it is about your kitchen. It is a major investment that can impact the value of your home. Do you have to unload pans before starting the cooking? If so, then you are facing the issue of low storage and you abruptly need a remodel for your kitchen.

Is the lighting too dim? you probably need an ardent remodeling company that can make it right for you. A poorly designed kitchen can make it much difficult for you to cook. It becomes adamant for you to keep going with the same kitchen. A remodel of the kitchen can make it spacious and allows you to add customized designs. A proper strategy has to be devised for the selection of the styles and materials. Remodeling is something that has to pay more heed than renovation. In remodeling, you are getting everything restructured. An infallible plan has to be implemented before things related to kitchen remodeling get channelized. A kitchen beautifully designed fulfills the productivity of making meals and makes the whole task joyous.

Who Will Use the Remodeled Kitchen?

Ensuring an error-free remodeled kitchen has some steps that need to be followed stringently. Being a homeowner your whim to design a kitchen that has countertops, flooring, and all other things designed your way. But you must keep an eye on the fact. That the person who will be mostly using the kitchen must remain comfortable with the changes. Such as the installation of cabinets ideally designed to sides. From the drawer’s placement and other elements. Some issues a left-hander has to face with a particular design elsewhere some will be faced with the right-hander. So designing it accordingly can ease down the use of the kitchen.

Devise A Strategy and Stick To It:

When you are about to start remodeling, the project makes sure that you remain meticulous and stick to your plan. You cannot start demolishing the old kitchen all at once but proper scheduling has to be done. Getting the appliances, plumbing hardware, and other components near you before you start. Contemplating the measurements and installation specification are also recommended to avoid any further issues

Pick An Impressive Flooring.

To sum it up in the bigger jargon of aesthetics you have to keep track of minor factors. Getting the floors ready boldly and practically is recommended. For the sake of changing don’t submerge things but add beauty. If you are thinking of getting floor coverings to be upgraded by the tiles then reconsider. As the doorway elevation issues can affect you. Or extra plywood has to be instituted to make it balanced and solid. Don’t install new flooring near the dishwasher. However, filling any hole or crack can make the difference. The top kitchen remodeling companies prefer guiding the homeowners regarding every aspect.

Get it Illuminated:

Remember that you get the proper lighting spots for your newly remodeled kitchen. An ambiance enhancing lighting can give a modern contemporary look to your kitchen. A kitchen that has dull lighting won’t give a cherishing appeal. The lighting spots should be planned so that your brand-new kitchen gets the best aesthetics. Proper attention to the lighting system can make a beautiful impact on your newly remodeled kitchen.

Cabinetry Selection:

Select the necessary hardware for the cabinet with care and precaution. There are innumerable handles and cabinet pulls easily accessible in the market. So, it would not be difficult to put the most appropriate items for your daily use. Your smartest decision, in this case, would be the selection of such handles which are thin and light in weight. Style and fine finishing are the amazing aspects of remodeling but they need their combination with ease in daily use. There are so many vendors in the market who offer this combination at moderate prices. Choosing each cabinet to change that can be made to every nook and corner will be recommended by remodelers.

Maximize the possibilities for Storage:

The desire for more room in the kitchen is the most common explanation of why homeowners restructure their kitchen. Kitchen Redesign is not so difficult anymore; you can find several contractors at very cheap rates. There are so many options by which you can enhance the storage and cabinet space. Like pull-out pantry racks, functional deep cabinet splitters, corner drawers, installing a lazy Susan in corner cabinets, raising drawer depths, placing shelving units on vacant wall space and it will add up the beauty and modernity of the kitchen’s new look. Hanging a ceiling rack for pots and pans, and installing cabinets that meet the ceiling will also be practically proven as an amazing idea. A capacious kitchen that can be incorporated in the best order is always more productive.

Make It Useable:

Practicing your aesthetic sense is very good but it is not always right to prioritize it. At some points, you are supposed to deal with the practicality of life and its needs. In the case of kitchen remodeling. It is more important to not compromise the functional approach in the renovation of your kitchen. Thus, it is not feasible for the cooking range, refrigerator sink. And to be stretched out too far from each other so that their usability regarding food preparation becomes hectic. In this case, cooking and cleaning and even all other arrangements will become more challenging. Make sure you know traffic trends of your routine in the kitchen and the workflow as well. So you can pick a design that brings the most practical meaning to the room available in it.