12×20 Raised Center Aisle Barn Shed Plans

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This step by step diy project is about 12×20 raised center aisle barn shed plans. I have designed this large barn shed so you can store lots of tools and other items. This shed features side run in sheds, so you can have an easy access. Take a look over the rest of my woodworking plans, if you want to get more building inspiration. Remember that you need to select the site for the shed with attention and that you have to comply with a few legal regulations.

When buying the lumber, you should select the planks with great care, making sure they are straight and without any visible flaws (cracks, knots, twists, decay). Investing in cedar or other weather resistant lumber is a good idea, as it will pay off on the long run. Use a spirit level to plumb and align the components, before inserting the galvanized screws, otherwise the project won’t have a symmetrical look. If you have all the materials and tools required for the project, you could get the job done in about a day.

 

 

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12×20 Raised Center Aisle Barn Shed Plans

Building a 12x20 raised center aisle shed

Building a 12×20 raised center aisle shed

 

  • A – 3 pieces of 4×4 lumber – 144″ long SKIDS
  • B – 2 pieces of 2×8 lumber – 144″ long, 10 pieces – 141″ long FLOOR FRAME
  • C – 3 piece of 3/4″ plywood – 48″x96″ long, 3 pieces – 48″x48″ long FLOOR
  • E – 2 pieces of 2×4 lumber – 144″ long, 1 piece – 137″ long, 12 pieces – 86 1/2″ long 2xSIDE WALL
  • F – 2 pieces of 2×4 lumber – 137″ long, 1 piece – 144″ long, 10 pieces – 19 1/2″ long BACK WALL
  • G – 2 pieces of 2×4 lumber – 32 1/2″ long, 1 piece – 137″ long, 1 piece – 144″ long, 8 pieces – 86 1/2″ long, 2 pieces – 78 1/2″ long, 6 pieces – 2 1/2″ long, 2 pieces of 2×6 lumber – 75″ long FRONT WALL
  • H – 6 pieces of 5/8″ T1-11 siding – 48″x91 3/4″ long, 5 pieces – 48″x90 1/4″ long, 1 piece – 9 1/2″x48″ long SIDING

 One weekend

 

 

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Building a 12×12 storage shed

Floor frame

Floor frame

The first step of the project is to build the floor frame for the shed. You have to use 2×8 lumber for the joists. Cut the components at the right dimensions and then drill pilot holes through the rim joists. Insert 3 1/2″ screws to lock the joists together. Align the edges flush and make sure the corners are square.

Fitting the skids

Fitting the skids

The next step if to attach 4×4 skids to the floor frame. The wood skids will lift the floor frame from the ground for a few inches and thus, protect it from the elements. Attach the skids to the floor frame using metal connectors or by inserting screws through the frame into the skids.

Floor sheets

Floor sheets

Lay the 3/4″ plywood sheets to the floor frame. Cut the sheets at the right dimensions, as shown in the plans. Align the edges flush, leave no gaps between the components and then insert 1 5/8″ screws to lock them into place tightly.

Side wall frames

Side wall frames

Continue the project by assembling the side walls. Cut the plates and the studs from 2×4 lumber. Drill pilot holes through the plates and insert 3 1/2″ screws or 16d nails into the studs. Place the studs every 16″. Make sure the edges are flush and check if the corners are square for a neat result.

Front wall frame

Front wall frame

Assemble the front wall for the 12×12 storage shed using the above instructions. Make sure you leave enough space for the door opening. You can make adjustments to suit your needs. Check if the corners are square and align the edges with attention. Use 2×6 lumber for the double header. Fit a piece of 1/2″ plywood between the headers to enhance its rigidity.

Back wall frame

Back wall frame

Build the back wall for the shed. Cut the components from 2×4 lumber at the right dimensions and then assemble the wall frame together using 3 1/2″ screws or 16d nails.

Assembling the shed frame

Assembling the shed frame

Fit the walls to the floor frame of the storage shed and align the edges flush. Use a spirit level to plumb the walls and drill pilot holes through the bottom plates. Insert 3 1/2″ screws into the floor of the shed for a neat result. In addition, lock the adjacent walls together using 2 1/2″ screws.

Side wall siding sheets

Side wall siding sheets

Use 5/8″ T1-11 siding sheets for the exterior walls. Cut the sheets at the right dimensions and then attach them to the side walls frames. Align the edges with attention, leave no gaps between the sheets and insert 6d nails, every 8″ along the framing.

Front wall siding sheets

Front wall siding sheets

Attach the siding sheets to the front of the raised canter aisle shed. Use a saw to make the cut outs for the double door opening. Leave 1 1/2″ from the top edge of the wall frame to the sheets. Use 6d nails, every 8″ along the framing.

Back wall siding sheets

Back wall siding sheets

Fit the T1-11 siding sheets to the back wall of the shed, as well.

12x20 Raised Center Aisle Shed Plans

12×20 Raised Center Aisle Shed Plans

Make sure you take a look over PART 2, 3 and 4 of the project, so you learn how to build the roof for this storage shed, as well as the side run in sheds.

12x20 Center Aisle Shed Plans - Back view

12×20 Center Aisle Shed Plans – Back view

Last but not least, you need to take care of the finishing touches. Therefore, fill the holes with wood putty and then smooth the surface with 120-220 grit sandpaper. Apply a few coats of paint or stain so you enhance the look of the shed and you protect the components from decay. This raised center aisle shed is easy to build and it really stands out, as it has an unique design but also provides a lot of storage space.

 

 

This woodworking project was about 12×20 raised center aisle barn shed plans free. If you want to see more outdoor plans, check out the rest of our step by step projects and follow the instructions to obtain a professional result.

 

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