10' - 0" Building W
idth
Nail the 2x4s to the 4x4
runners to keep the 2x4
frame from moving.
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 when the floor is square.
2.
Cut 2x4-10' floor joist to 9'-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 10'-0" building width.
X
X
X
X
X
X
16"
15-1/4"
Joist Header
X
X
16"
Material Description
10' x 12' shed
10' x 16' shed
2x4 Joist Headers
2 pcs.
12'
2 pcs.
16'
2x4 Floor Joist
10 pcs.
10'
13 pcs.
10'
4x4 Treated Runners
3 pcs.
12'
6 pcs.
8'
Flooring 5/8" or 3/4"
4 pcs.
4x8
5 pcs.
4x8
Screw Floor Nails
1 lb.
8d
2 lb.
8d
Galv. Box Nails
1 lb.
16d
1 lb.
16d
4x4 Treated Runners
Joist 9' - 9" Long
2x4 Joist Header
Building Length
11' - 9"
Foundation size is 10'-0" x 11'-9". 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.
1.
Cut 2x4-12' joist headers to 11' - 9".
Layout for 16" on center joist spacing. 'X' marks where floor joist will be placed.
Constructing Details for Deluxe Floor System
Deluxe floors include 4x4 runners, standard floors do not
