Material Description
10' x 8' shed
12' x 8' shed
2x4 Joist Headers
2 pcs.
10'
2 pcs.
12'
2x4 Floor Joist
9 pcs.
8'
10 pcs.
8'
4x4 Treated Runners
3 pcs.
10'
3 pcs.
12'
Flooring 5/8" or 3/4"
3 pcs.
4x8
3 pcs.
4x8
Screw Floor Nails
1 lb.
8d
1 lb.
8d
Galv. Box Nails
1 lb.
16d
2 lb.
16d
Floor length for 10' shed is 9' - 11"
Floor length for 12' shed is 11' - 11"
!
It is important that the floor be
level and square. Square the
floor as follows: 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.
2x4 Floor Joist
spaced 16" o.c.
2x4 Joist
Header
4x4 Treated Runners
Flooring
96" Depth
Cut Floor Joist to fit
between Joist Header
Side
Walls
!
1.
Cut joist headers to floor length. See Below.
Layout for 16" on center joist spacing. 'X' marks where floor joist will be placed.
X
X
X
X
X
X
16"
15-1/4"
Joist Header
X
X
16"
Constructing Details for Deluxe Floor System
Deluxe floors include 4x4 runners, standard floors do not
Check local building codes in your area, the construction may have to change. For a concrete slab,
install 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.
2.
Cut 2x4-8' floor joist to 7'-9". See note below.
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 8'-0" building length.
