A covered plywood mineral box, 48 x 18 in, on two 2x4 legs, with a lip, a back and a sloped roof.
Draft plan, generated from the model. Not yet build-tested.
48 x 18 inSize
cattleFor
2 to 3 hrBuild time
$47.88Materials
Drawings All dimensions in inches
3D viewfinishedFront elevationRight elevationPlan viewfrom above
Cut list: lumber Long-point lengths; angles noted
Qty
Stock
Length
Part
Cut
2
2x4
24
Leg
on edge, under the floor
Cut list: sheet goods
Part
Stock
Size
Note
Floor
1/2 ply
48 x 18
Front lip
1/2 ply
48 x 4
Back
1/2 ply
48 x 12
Left end
1/2 ply
17 x 12
top cut at the slope
Right end
1/2 ply
17 x 12
top cut at the slope
Roof
1/2 ply
50 x 22 7/8
leans back, shelters the minerals
Lumber cutting diagram Lengths chosen for the lowest cost; 1/8 in kerf, 1/2 in end trim
2x4 x 8 ft
Leg 1 24Leg 2 24
Sheet cutting diagrams Dashed = openings to cut out
Sheet 1: 1/2 in plywood, 4 x 8 ft
Shopping list $47.88 checked / $0.00 estimated
Item
Store
Qty
Each
Line
Note
2x4x8 stud, SPF
Home Depot
1
$4.15
$4.15
see lumber cutting diagram
15/32 in (1/2 in) sheathing plywood, 4x8 sheet
Lowe's
1
$32.26
$32.26
see sheet cutting diagrams
Exterior wood screws #9 x 2.5 in, 1 lb box
Home Depot
1
$11.47
$11.47
Total before tax
$47.88
Filled dot: price read from a store listing on Oct 20, 2026. Hollow dot: estimate. Prices come from the master price list, so they change when it changes.
Build steps
Cut the plywood floor, lip, back, ends and roof from the sheet layouts.
Screw the floor to the two 2x4 legs, then the lip, back and ends around it.
Screw on the roof so it leans back, with 2 in of overhang at the front.
Stake it to a post or screw it to a fence at a height that clears the animal's back, away from the water.
Put in loose mineral for cattle, 1 to 2 lb at a time.
Before you start
Loose mineral is better than a block for goats and sheep. Never feed cattle mineral to sheep: it has too much copper.
Keep it dry and covered, and close to where the animals rest, not by the water.
Draft drawings generated from the model. Build one before selling this plan.