Deck Footings Articles
At EZ-CRETE, we love this question because it means you are building your deck with care and attention, just the way we build all our products. To determine the live load that dynamic load that changes when people, snow, furniture etc. Your live load may change depending on where you are located. Check with your local code official to make sure your live load falls within this range.
For your dead load, figure 15 pounds per square foot, for a total load of 55 psf depending on your location. Providing you are attaching one or more sides of your deck to the house, this is your tributary load. This is your tributary square footage. To figure out the weight supported by the footings multiply the tributary square footage by the total live and dead loads, in this case, 55 psf.
Now you can use the chart below to figure out how many footings you will need. Space footings equally where possible. Choose your soil type, then find the typical load by the footing type with or without an EZ-Base. Note that generally code requires a base section.
Check with your local code official. Once you know how much load a single footing will carry in your soil type simply divide your tributary load by the weight typical for one footing to determine the number of footings you need. Different jurisdictions may require more or fewer footings. Always be sure to check with your local code official before building.
We will teach you how to determine the code compliant size of your footings based on the soil type and tributary loads. Check out our deck footing frost map to help you understand how deep your footings will need to be excavated.
We will also show you how to decide the number and spacing of your footings. Some of our articles focus on the various types of accepted footings that are used by professional deck builders. We feature articles on how to install continuous concrete pier foundations, belled piers, footing forms and the buried post on top of the footing method. We will conclude the section by explaining how to work with concrete, covering some common issues related to deck foundation work, as well as answering some frequently asked questions.
Learn how to install concrete footings to properly support your deck. Watch our step-by-step foundations video. Learn how to install a concrete deck footing with a buried treated support post as an alternative to a solid pier foundation. Compare the pros and cons of installing a solid concrete deck footing using a cardboard tube or engineered forms.
Find out how deep you need to dig your footings in your area. Look at our U. Learn how to hand dig or mechanically dig your deck footings with step-by-step instructions. Learn what to do if you hit a rock. Learn how to determine the number of footings and support posts you need for your deck when designing your deck frame. Learn how large to make your deck footings.
Use our table for maximum allowable loads to determine the proper size for your soil type. Learn how soil conditions can affect the size of your deck footings.
Do you have gravel, sand or clay soil? Learn about the advantages of using Bigfoot systems concrete footing forms. Research their testing and code compliance reports.Deck beams and joists go hand-in-hand as the framing materials for your deck. While joists provide a horizontal support system for deck boards, beams provide support for the joists.
Your beams will need to bear the load of not only your decking materials, but additional components of the frame itself.
According to our beam span chart resourcethe span of a beam is dependent on a few variables: the species of lumber, size of lumber, and the load it carries.
Use this calculator to find out the beam span and deck footing size for your project. Be sure to have your joist span calculations ready to enter for an accurate reading and check out our concrete calculator to determine the size of your footings. Some of the most common types of wood used for beams include:. All are high-quality woods to use for framing purposes, however, your geographic region plays a role in which woods will be available to you. Redwoods, Hem-Fir, and some of the other combination woods are not available outside of the Western part of the United States.
On the flipside, Pinewoods are only available in Southern and Eastern regions of the country. However, shipping costs for large amounts of lumber can cost almost up to five times the actual price of the lumber itself. They make for a stronger, straighter, safer, and smarter alternative to wood substructures and may be more economical in the long-run. Due to their strength, fewer beams or posts are needed.
This means there are fewer holes to dig and fewer posts to look at from the ground floor of your home. This makes for a more attractive, unobstructed view from your front windows. Another benefit to steel framing is that the material is non-flammable and many insurance companies offer a discounted rate for steel deck framing. Register Log in.
By clicking GO! Joist Length 6' 7' 8' 9' 10' 11' 12' 13' 14' 15' 16'. Post Spacing 4' 5' 6' 7' 8' 9' 10' 11' 12' 13' 14'. Was this calculator helpful? Yes Some What No. Additional feedback?Hacker experience 2 steam
For example, if you are building a 10x10 deck attached to a house with two footings on the corners, you could calculate the loads for the footings in the following way.
First, draw a line dividing the deck into two halves between the house and the footings. The load for the section nearest the house will be transferred back to the ledger board and carried down to the house foundation. The remaining half of the deck will again be split into two parts to be supported by the two corner footings. This is called the tributary load. You can multiply this area by 55 lbs per square foot loading to come up with 1, lbs total load.
Deck Footing Size Chart
Once you know the total load, you can use the chart below to determine the footing size for your soil conditions. Always be sure to check your calculations with your local building inspections department before digging. Circular Footings.View all packages
Glad to see you are using the oft-overlooked "sqaure feet" unit in the green area of the graphic. The first line is the pressure per square foot.
This is done by transferring the shape and dimensions of your scale deck plan to the construction area in full size. Start from one corner and establish a straight line along one of the longest edges by driving an 18 to 24 inch tall wooden stake into the ground at each corner of that line.
If one edge is against the house, or another structure, start with that and measure out to establish the outside edge. From this line, measure and drive in a stake at each corner of the deck to establish the outline. Measure from the corner stake along one angle of your corner to 3 feet. Measure from the post along the opposite angle to 4 feet. Mark both points and measure between them diagonally.
The distance should be 5 feet. Adjust your second angle in or out until the distance is 5 feet exactly for a perfectly square corner!
Starting with your perimeter, mark the location of each deck post to locate the fitting position. In general, posts should be spaced no more than 8 feet apart. Some builders position them every 4 feet for a completely rigid frame. The maximum distance between footings is determined by the size of your joist material. A span is the unsupported distance between two posts. Cart: View your shopping cart.
2. Deck Layout and Footing Position Spacing
Search this site:. DIY Deck Plans. Deck Layout and Footing Position Spacing. Post Holes. Tutorials 1. Before You Begin 1.
Deck Layout 3. Post Holes 4. Deck Ledgers 5. Deck Beams 6. Deck Joists 7. Blocking 8. Cut Corners 9. Rim Joists Level Changes High Decks Custom Framing Hidden Fasteners Joist Cap Decking Railings Skirts Stairs What ground level deck footing options are out there, and which one is right for your deck plan? Quick Navigation. A ground-level deck, sometimes referred to as a floating deck or platform deck, is so-called because, unlike conventional decks, a ground-level deck is not attached to a home or building.
While a floating deck might be next to a building, it may also be a standalone structure in the middle of your yard. Floating decks are also called ground-level decks because they typically hug the ground. According to the main code provision for footings, the only requirement for building a deck that is freestanding is that it must have a minimum footing depth of 12 inches below the undisturbed ground surface.
There is no need to extend a footing below the frost line, as is required for standard decks. This almost goes without saying, but you need to use pressure-treated lumber when you build a deck. As with standard decks, your ground level deck will be exposed to the elements, so pressure-treated lumber is required to prevent your deck from rotting.
This is even more crucial with ground level decks as they will likely make ground contact due to their nature. This means the deck frame will be more exposed to moisture, making them more susceptible to rot.
As such, your build time for a ground-level deck should be markedly faster than it is for a standard deck. These relaxed restrictions allow for footings that are sometimes cheaper or significantly easier to install than footings for standard decks. Below is a comprehensive list of the options you have to choose from. Deck blocks are cheap and easy to install.
For these reasons, deck blocks are one of the most popular options out there. That said, they do have their limitations. Due to their small footprint, you need to distribute the weight over a large number of deck blocks to prevent the blocks from sinking into the ground. This means more footings than other options require. Like deck blocks, concrete blocks also represent a cheap yet effective alternative for footing your ground level deck.
This method functions by taking concrete blocks and laying them on a bed of gravel.Before starting to build, the first question is: How many footings do I need for a deck? Just decide its size and shape, then calculate and measure each element of the design as detailed step-by-step below.
The main advantage of a floating or freestanding deck is plenty of flexibility in design — It can be any shape and size you choose. As the name implies, an attached deck is connected to some existing structure, such as a house, garage, or other building. The advantage is that you may be able to use fewer footings by tying into an adjacent foundation.
If so, you could avoid some of the digging work and material costs for deck footings. The disadvantages are that you may need to work around exterior or underground plumbing and electrical lines. You might also need to build the deck in an irregular shape to fit existing property contours. Concrete deck footings are very popular. Building codes require the use of rebar to help support the weight of all attached decks. You can achieve similar results by using precast concrete deck blocks or piers instead of pouring concrete yourself.
They usually have a concrete lug on top, so that you can attach wooden deck beams later.Tronxy x5sa firmware download
In a cold climate, you must check local regulations to ensure that your deck footings are placed below the frost line. The size of your deck is the most important consideration. As mentioned earlier, you can use deck blocks to build a small deck. Large decks or structures on unstable soil will require poured footings or perhaps even a continuous foundation of poured concrete around under the entire perimeter.
If you have any doubt about soil conditions, ask someone at the local building-permits department. Whichever type of deck you want, the first step is always to draw and layout your design before calculating the material costs.9 – is it possible to index the civil registry of the town where i live
Make a simple drawing on grid paper. You can also figure out the exact placement of each deck footing. The drawing should include any nearby structures, trees, and utility lines.How to Build Deck Footings \u0026 Foundations
The shape of your planned deck is another important consideration. Important — After marking the corners of your layout, you should always check for squareness by triangulation.
Triangulation means measuring across the diagonals between each opposing corner.
How many EZ-TUBE footings do I need for my deck?
These diagonal measurements should be the same. For decks with lots of angles, that means at least one footing for every angle or projection. The diameter of the footings commonly range between 8 and 24 inches.
Most builders use inch diameter footings. Additionally, determine approximately how much total weight the deck will hold. Soils are classified as mostly gravel, sand or clay. Gravel-type soils can support the most weight, typically up to 3, pounds per square foot.
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