Easy Diy Shed Building Plans

Shed Foundation Piers and Floor Anchors

Shed foundation piers/floor anchors, are one way of anchoring your wooden shed floor. Most if not all sheds that I build with wooden floors are anchored with a minimum of 2 to 4 piers set in concrete.

How I Do My Shed Floor Anchors

Does Your County Require Shed Foundation Piers?

I have found that most counties in the vicinity of where I live want you to use a 4x4 treated post (pier) anchored in concrete in a hole that is dug just below the frost line. And, this is one of the most commonly accepted methods of anchoring a shed down. Personally, I would always use 4 shed foundation piers in concrete. One for each corner, with blocking under the skids spaced out evenly between the concrete anchors.

Here is an example:

Shed Foundation Piers

You can see that the floor has 4x4 pressure treated skids or runners as supports for the floor joists on this example.

This particular example has 3  - 4"x4" skids under the floor and at each end of the outside skids, about 1' in from the end is a concrete anchor. These 4"x4" treated posts are usually set in concrete in a hole that is a minimum of 6" in diameter,  but usually 8" in diameter, and dug to a minimum depth equal to your areas frost line.

The piers or pressure treated posts are 'held' on to the skids with either mending plates on each side, or post caps. Either method should be acceptable but it is always a good idea to check with your building inspector first before proceeding with this method of anchoring your shed floor.

Since foundation piers of this manner are used to anchor the shed down, you will also probably need to add additional supports under the floor skids in between the anchors.

This can be accomplished by using treated 2x4's stacked on top of each other from the ground up to the skid.

You can also use concrete blocks stacked on each other.

Usually on the shed floors I build, I will have a minimum of 2 concrete foundation piers, up to 4. Then I will use the blocking described above,  spaced evenly between the anchors about every 4' or so.

As an example, if your shed has 3 runners or 4"x4" pressure treated skids, the middle runner can just be supported with the blocking at equal intervals, usually about every 4'. I always suggest that buyers of my storage shed plans check with their local building inspector to make sure which method of anchoring your shed floor is acceptable in your particular locality.

Using a Post Cap for Skid Attachment

Using Mending Plates for Attaching Anchors to Floor Skids

Monthly DIY 
Shed-in-sight
Newsletter

Subscribing will get you discounts on shed plans, monthly updates, new shed design ideas, tips, exclusive discounts on shed building resources and tools.  Learn more here.

Recent Articles

• 
• 
• 

1. Joining the walls of a shed to each other

   Apr 02, 24 09:49 PM

   Hello! My son and I are planning on building an 18'foot x 18'foot lean-to style storage shed. When I was a kid building walls with my own dad (about 60

   Read More

2. Types of Roofs For Sheds: Designs, Materials, and Styles

   Feb 07, 24 10:23 AM

   
   Various types of roofs for sheds including gable, hip, gambrel, saltbox, flat, and more. Gain insights into designs, materials and styles.

   Read More

3. How to build a shed roof, Shed roof construction, Shed roof design.

   Feb 07, 24 09:17 AM

   
   Here's a simple how to build a shed roof guide. Your shed roof construction and shed roof design from building simple shed roof trusses right here at shedking.net

   Read More

My You Tube Videos