12' - 0" Building W
idth
To keep 2x4 frame from
moving, toe nail to 4x4.
DOOR WALL
X
X
X
X
X
X
16"
15-1/4"
2x4 Joist Header
X
X
16"
Shown below is a typical wood floor. Depending on your area, the construction may have to be
changed to meet local codes. When using a concrete slab, use the same overall foundation
measurements. Install foam sill sealer as a moisture barrier between the concrete and the wall
plates. Foam sill sealer can be purchased at home centers in rolls 3-1/2" or wider.
4x4 Treated Runners
2x4 Joist 11' - 9" Long
2.
Cut 2x4-12' floor joist to 11'-9". Treated lumber may be thicker than 1-1/2". Take this into
account when cutting the length of floor joists. Shorten joist measurements if necessary to
obtain 12'-0" building width.
1.
Cut (2) two 2x4-12' joist headers to a length of 12 '- 0". Layout for 16" on center spacing.
'X' marks where floor joist will be placed.
4x8 Flooring
It is important that the floor be level and square.
Before nailing the flooring, measure the floor
diagonally (corner to corner). Then measure the
opposite corners. These measurements will be
the same if the floor is square.
Material Description
12' x 12' shed
2x4 Joist Headers
2 pcs.
12'
2x4 Floor Joist
10 pcs.
12'
4x4 Treated Runners
4 pcs.
12'
Flooring 5/8" or 3/4"
5 pcs. 4x8
Screw Floor Nails
2 lbs.
8d
Galv. Box Nails
1 lb. 16d
12' - 0" Floor Length
Constructing Details for Deluxe Floor System
Deluxe floors include 4x4 runners, standard floors do not
