The monster truck play fort is something me and my son have been talking about for several years and after I got my hands on a set of six foot tall tractor tires we had to make it a reality, so I drew a rough set of plans and got started. I set four posts in concrete, we used some logs from a friend's property, and built a lifted platform on the posts. The truck body was framed up with 2x4's, sheeted in plywood, and painted. A trap door was built into the floor of the platform, and a ladder was made from 2x4's. We lag bolted the tires to the monster truck fort platform, we filled the bottom of the tires with sand, so my son could play with his toys in them.
Step 1: What you will need
4 huge tires.
4 sturdy posts, we used logs.
16 80lb bags of concrete.
2 16ft 2x6's.
11 8ft 2x6's.
52 8ft 2x4's.
36 4in 3/8 lag bolts with washers.
4 4ftx8ft sheets of plywood flooring.
8 4ftx8ft sheets of OSB for the walls.
Nails and wood screws, 3in-3.5in for framing and 1.5in-2.5in for securing plywood.
3 gallons of Paint or stain to provide some waterproofing.
Wood cutting saws, we used a compound miter saw, circular saw, and a reciprocating saw.
Drill and bits,
Ratchet and socket to drive in the lag bolts.
Hammer and pneumatic nail gun.
Step 2: Set the posts
We partially builft the frame for the platform and used it to mark the location of the post holes. We dug 3ft deep holes and set the posts in place. We did our best to get the logs level and square and filled the holes with roughly 4 bags of concrete per hole.