Having a sturdy shed floor is crucial to maximizing the life of your shed. If the construction is not done properly, a multitude of problems will and can occur over the life of your shed. Here are just a few:
There is more than one way to build a shed floor and this is how I build my wooden shed floors.
The following instructions refer to different terms like band boards, rim joists, floor joists, and skids. If you are unsure of what those terms are please have a look a my shed floors page.
1. Check your local building codes if you haven't already to determine what type of anchoring you need to do for your shed.
Chances are if you have applied for a permit you'll know the answer to this question already. Usually, there are two types of anchoring if you are not building on top of a concrete slab. One way is to anchor your shed to the ground using cable tie-downs, or anchoring it with your floor being fastened securely to posts which are sunk into the ground at a pre-determined depth in concrete.
Make sure whatever is required by your county that you follow their guidelines.
2. Gather the proper lumber to cut your floor joists, rim joists, and 2 two band boards and 4x4 skids. Cut all floor joists to proper length along with your 2 rim joists and two band boards and skids. Also, cut your 4"x 4" skids to length.
3. After cutting all lumber, mark off your two band boards for joist layout at 12" on center. Assemble the frame using 16d galvanized common nails, making sure to check each joist for crowning and install it with the crowned edge up.
4. Lay out your 4" x 4" skids properly spaced and lined up on your foundation, making sure they are level. Set the floor frame on top of the skids and measure the diagonals from one set of opposing corners then the other set of opposing corners to make sure it's square.
At this point, toe nail all joists to your skids using 16d common nails. The joists which fall at the 4', 8', and 12' ( joists that are on the 4' increments) lengths along your skids should be measured before nailing to make sure they are nailed exactly on center at those distances. This way, when laying your decking (or flooring) down, your edges will fall right in the middle of your joists for easy nailing.
5. Whichever method you need to use for anchoring your shed, it should be done at this step before laying down and nailing your floor sheeting.
Left click with your mouse inside the floor framing to view this shed floor in 3d.
Check out the following 3dmodel of a typical shed floor with one anchor in each corner and blocking in between the anchors and also all along the middle 4x4 support skids. I have found this method of anchoring a shed down to be widely accepted in most localities for buiding permits.
6. Now lay out your floor sheeting starting with one of the front corners first. The reason for this is that you want the front part of your floor looking nice. It's the first thing visitors will see when stepping into your beautiful new shed. Use 8d galvanized box nails driven every 6" along the edges and every 12" in the field.
7. It's best to nail the shorter 4' side first. This way you will be able to pull the longer side over to align up with the outside edge of the floor framing. This will ensure that your floor sheeting will be squared up properly. Of course, if your floor framing is not perfectly square then your floor sheeting is not going to line up properly.
It's easy to add a ramp to your shed floor. Many sheds will serve the purpose of having a place to store riding mowers, 4 wheelers, outdoor equipment, etc. You'll want to build a ramp to make it easier to move these items in and out of your shed.
Do not purchase materials or attempt to build this shed project unless you have studied the information provided thoroughly, and have verified all dimensions and material requirements for yourself. Also verify that the plans conform to local building codes and practices. Although every effort has been made to ensure the accuracy of the information and design, the user is ultimately responsible for the use of this information. All information provided is copyrighted and cannot be duplicated without the permission of Shedking.
More information about how to build a shed.
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