Instructions / Assembly

To keep 2x4 frame from
moving, toe nail to 4x4.
3. 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.
2. Cut (2) two 2x4 joist headers to length. Cut 2x4s to 12'-0" for a 12' long building, 16'-0"
for a 16' long building. Layout for 16" on center joist spacing. 'X' marks where floor joist
will be placed.
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 when the floor is square.
Constructing Details for Deluxe Floor System
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.
X
X
X
X
X
X
16"15-1/4"
2x4 Joist Header
X
X
16"
12' - 0" Building W
idth
4x4 Treated Runners
2x4 Joist 11' - 9" Long
Door Wall
4x8
Flooring
Joist Header 12'- 0" for 12' building
16'- 0" for 16' building
4x8
Flooring
4x4
Flooring
12' - 0" or 16' - 0" Length
1. For a 16' building, butt the 4x4-8' timbers together to make 16' runners. Secure the 4x4s
together with 2' long 2x4 blockscut from (2) two 8' boards using 16d glavanized nails.
Material Description 12' x 12' shed 12' x 16' shed
2x4 Treated Blocking 2 pcs. 12' 2 pcs. 8'
2x4 PT Joist Headers 2 pcs. 12' 2 pcs. 16'
2x4 PT Floor Joist 10 pcs. 12' 13 pcs. 12'
4x4 Treated Runners 4 pcs. 12' 8 pcs. 8'
Flooring 5/8" or 3/4" 5 pcs. 4x8 6 pcs. 4x8
Spiral Floor Nails 2 lbs. 8d 3 lbs. 8d
Galv. Deck Nails 1 lb. 16d 3 lbs. 16d