How many footings do I need for a 10x10 shed?

There is no hard-and-fast answer, but a good rule of thumb (if using concrete foundation piers) is one shed footing every 8-10 feet.

siteprep.com - Shed Footings: The Complete Guide for 2023 - Site Prep

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Footing Requirements for a Shed

1. Footing Requirements by Shed Size

This may be the single most important shed footing factor. Many local governments in our region divide sheds into the following size categories:

Less than 100 square feet

Sheds under 100 sq ft (or 200 sq ft in some locations) often require no footers whatsoever. Very small sheds like these have a low risk of sinking or buckling. Even if they do, any harm caused is likely to be insignificant. (A shed foundation can still increase the longevity of a small shed; you can read more about whether your shed needs a foundation here.)

Between 100 and 600 square feet

Sheds in this range often do not require “frost-proof” foundations but may be required to have a stone pad or shallow footers at 12” deep. For example, 12×16 shed foundation footers may not be required, but some type of gravel shed foundation would likely be advisable.

Over 600 square feet

Larger sheds like these typically require “frost protection”, aka shed footings that extend below the local frost line. Some locales make an exception to the footer depth requirement if the building is placed on a concrete slab.

2. Footing Requirements by Shed Wall Height

Height is another significant factor as it helps to determine how much weight the shed footers will be supporting per square foot. Note that for these purposes, shed heights are typically measured at the wall (or “eave”) height rather than the height at the roof peak. Sheds are often divided by height as follows:

Less than 10’ high

Sheds with walls under 10’ (or 12’ in some locales) may not require footings of any kind (although this is usually tied to a square footage requirement as well). If the shed includes a built-in floor, some municipalities allow them to be placed directly on a gravel pad.

Over 10’ high

Sheds over 10’ in height (or 12’ in some municipalities) often require footings of some type. Additionally, the local government may require both a zoning and construction permit for accessory buildings of this size. For example, barn shed footings would likely be required if the building contains a loft area or a second story.

3. Footing Requirements by Shed Utilities

Footings may be required if a building will be connected to any type of utility service. This includes electric, gas, oil, and/or sewer. In the photo above, an electrical conduit was installed as part of the shed footing/shed foundation installation; it will be connected to the shed when it is delivered. A utility connection can also affect whether a construction permit is required for the shed. This makes sense since the repercussions of a sinking shed are greater if it also runs the risk of rupturing or exposing a utility line.

4. Footing Requirements by Shed Use

If a shed will be used for habitation or any other human activity, shed footings may be required. In at least one case, a township noted that frost-depth shed footings were not required if “the building presents a low hazard to human life in the event of failure”. So if someone asks whether footers are necessary for an implement shed, the likely answer is “no”. However, shed footings are a good idea if an outbuilding will be used as a workshop, she shed, or office (as shown above). Here are links to shed footing regulations from several municipalities that you can refer to for ideas of what the typical requirements look like:

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Can I build a shed base with 2x4?

I have a shed built completely with 2x4s: studs, mud sills, top plates, and rafters. Of course, the "skin" is plywood and siding. For a shed you're generally okay with 24" centers, rather than 16". For your floor, since you're not using a concrete slab, you will probably want 16" centers.

diy.stackexchange.com - How much of a shed can be framed using 2x4 lumber?

The place I work at has been ordering new machinery and it comes in with 2x4 frames. They are throwing the wood away! Anyhow, I can get all I want. So my question is how much of the shed can I do using only 2x4's? I see most bases of the shed are done with 2x8's or something along that line. I will be building it off the ground with blocks as I cannot afford a concrete slab at the moment. I would like to build more of a shop than a shed. Maybe 15x20? But my longest "free" wood is 12 ft. My current shed is a dirt floor. I could live with that if need be. My current shed is old school. I live in the country, so no certain requirements have to be met. Anyhow, the sheds bones are old utility poles. It's in an awkward spot, so I wanted to build a newer one in a different spot. The walls are tin. No plywood on the walls. Roof is tin as well. I'm just trying to see if the wood I get at work will be enough to cover 90% of the cost. I want 20ft long, so can I build 2 ten ft walls and join them together to make 20ft? I understand that may not be proper, but it's a shed not a house.

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