Shed Plans Shed Foundation and Flooring

Question 1

What is the most common foundation type for a small backyard shed in the US?

Accepted Answer

Gravel pad with treated lumber skids

Answer

Concrete slab

Answer

Poured concrete piers

Answer

Helical screw piles

Question 2

Which lumber grade is recommended for shed floor joists in direct ground contact?

Accepted Answer

Pressure-treated #2 Southern Yellow Pine

Answer

Grade 1 Douglas Fir

Answer

Standard SPF

Answer

Finger-jointed pine

Question 3

How much gravel depth is typically recommended under a shed foundation gravel pad?

Accepted Answer

6 inches

Answer

2 inches

Answer

4 inches

Answer

12 inches

Question 4

What spacing is standard for floor joists in a typical 12×16 shed plan?

Accepted Answer

16 inches on center

Answer

12 inches on center

Answer

24 inches on center

Answer

32 inches on center

Question 5

Which plywood thickness is recommended for shed flooring to support heavy equipment like lawn tractors?

Accepted Answer

3/4 inch

Answer

1/2 inch

Answer

5/8 inch

Answer

1 inch

Question 6

What is the primary purpose of placing a vapor barrier under a shed floor?

Accepted Answer

To prevent moisture from the ground migrating into the floor framing

Answer

To insulate the floor

Answer

To improve the appearance of the foundation

Answer

To increase the load capacity