Instructables
Picture of Monster Truck Fort
mt done us.jpg
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. 
 
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Step 1: What you will need

Picture of What you will need
mt tools.jpg
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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. 
Shovel. 
Tape measure. 
Level. 
Carpenters square.

Step 2: Set the posts

Picture of Set the posts
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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.
onemoroni110 months ago
Great build for you and your son. It's nice to fulfill your ideas. I can see you adding lights, seat, steering wheel, and other accessories. Post a follow up pic.
troopersmachine (author)  onemoroni110 months ago
Thank you.
We definitely plan to add some more to the fort, we have collected a steering wheel and a seat. I will posts more photos after we add more accessories.
cody30510 months ago
You must live in an area that allows you to build strange projects in your backyard, correct? What will you do with your Monster Truck Fort when your son is too old to play in it anymore (just curious) ?
troopersmachine (author)  cody30510 months ago
I live in a rural area outside of any city limits, I don't think my monster truck is really that strange of a structure. It is after all just a partially covered deck.
I am not sure what I will do with it, probably keep it until I have grandkids that can enjoy it. As of right now the dogs sure seem to enjoy napping in the shade underneath it.
killbox10 months ago
It would be a good idea to drill a bunch of large holes into the bottoms of those tires, so they dont capture rain and become mosquito breeding grounds.
troopersmachine (author)  killbox10 months ago
I agree the tires would be mosquito breeding grounds if allowed to fill up with water. In step 7 I suggested drilling drain holes in the tires before filling them with sand.
Tazmjm6910 months ago
Very cool idea! All my Dad built me was a plain old tree house
troopersmachine (author)  Tazmjm6910 months ago
Thanks.
A plain tree house is better than no tree house.
My dad built us a platform fort when I was a kid, it was a simple square enclosure with a trapdoor and a small deck. It was a lot of fun but I wanted to build something a little more personal with my son.
Yeah, I liked my tree house, but yours is much cooler and imaginative! Take care.
tbaltz10 months ago
Nice!!!!
troopersmachine (author)  tbaltz10 months ago
Thanks
mikeasaurus10 months ago
Great stuff!
troopersmachine (author)  mikeasaurus10 months ago
Thanks
bakunin10 months ago
This is such a cool and creative fort design!
Extra points for clever use of a monkey's fist knot for the trapdoor handle.
troopersmachine (author)  bakunin10 months ago
Thanks,
I thought it would be fun to throw a monkey fist into the project.
David Symonds10 months ago
Oh, my god, good.
troopersmachine (author)  David Symonds10 months ago
Thanks
mbourhan10 months ago
Very nice,
Any plans for defence equipment ?
troopersmachine (author)  mbourhan10 months ago
Thanks,
we don't have any plans yet for defense equipment, a water cannon of some kind might be fun.