Grind Box

Price: $200

This plan is made to leave the builder with a lot of freedom and creativity. The grind box in these plans is 4 feet wide, 8 feet long, and 1 foot high. If you want to use different dimensions all you have to do is change the length of a few 2x4's. This build is fairly cheap considering how sturdy the finished product is, and if you coat it with the right finish it should last for many years.

What You'll Need

  • Twenty 8-foot long 2x4's
  • Two 3/8" sheets of treated plywood
  • One 8-foot black steel pipe (2" diameter)
  • 3" and 1 1/2" deck screws
  • A skill saw or whatever you prefer
  • A pencil to mark your cuts
  • A drill
  • One tape measure
  • The required safety gear

Cut List

MATERIALS CUT LIST
--- Description --- --- Dimensions --- --- Quantity ---
3/8" treated PLYWOOD 3' 10" x 8' 1
3/8" treated PLYWOOD 10" x 8' 2
3/8" treated PLYWOOD 4' x 1' 2
2x4 (treated) 7' 11" 6
2x4 (treated) 3' 9 1/2" 14
2x4 (treated) 3' 4 1/2" 9
2x4 (treated) 11 1/2" 10
2x4 (treated) 6 1/2" 14
2" black steel pipe 8' w/ 2" diameter 1
screws 3" deck screws 160-180
screws 1 1/2" deck screws (for plywood) 80-90

Make the sides

Assemble the top and the bottom of the box. Use the 7' 11" 2x4's for the length and the 3' 9 1/2" 2x4's for the width. you should use the 3" deck screws for everything except the plywood (2 on each end of each stud). Space the studs on the 'top side' 1 foot apart and the studs on the 'bottom side' 2 feet apart.
Make the sides

Attach top and bottom

Use the 11 1/2" 2x4's to connect the top and the bottom as shown in the picture below.
Attach top and bottom

Start framing the curve

Screw the 6 1/2" 2x4's in between the top and bottom to make the sides flush.
Start framing the curve

Finish framing the curve

First, screw two 7' 11" 2x4's lengthwise (as seen in the picture below) creating a space for the rail on one side. Then screw the 3' 4 1/2" 2x4's in between so that they line up with the studs underneath every foot.
Finish framing the curve

frame the wall

There are two ways of doing this. You can either use screws, or you can use hooked bolts. The best way, and the one we'll use is the bolt method. You will need 2 hooked bolts (with nuts) to attach the rail such as the one below.
coping bolt
To attach the bolt you will need to drill a hole in the coping for each bolt. You will also need to drill a hole in the 2x4 that you want to attach it to.

*To see a full tutorial on how to install coping, see our Adding Coping Section for details.

frame the wall

Screw on the plywood

This part is pretty self-explanatory so I won't go over it in much detail. Basically, use your 1 1/2" screws to attach the 3/8" plywood. You should only need one layer for this.
Screw on the plywood

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