Fire Pit Swing Set – Great Addition in Just 1-2 Days

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Thinking of improving your outdoor living space? Adding outdoor furniture is great when you have a roof to protect cushions against sudden rain. But if you have a wonderful open space, then this fire pit swing set is perfect for you!

A fire pit is a year-round joy and overall value-booster for your home, with every detail a personally curated choice, right down to the distinctive style of seating. And arranging guests comfortably around the fire should be easy with this particular DIY project.

A fire pit swing set like this not only adds appeal to your home but is also a wonderful venue for spending quality time with family and friends. The owner/builder of this swing set decided he would make one for his grown-up kids, and sure enough, they frequently use it to hang out with their friends and family.

Getting this fire pit swing set project started could be a little challenging for some of its hexagonal shapes. But once you get all the accurate measurements and cuts, putting it all together would be relatively fast and easy. You could buy a swing set from a manufacturer to save time and effort, or you could build them yourself using reclaimed lumber if you want. The same is true with the fire pit.

Fire Pit Swing Set

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How to Build Your Fire Pit Swing Set

Materials:

  • 6 pcs 6″x6″x10′ pressure treated boards for the fire pit swing set posts.
  • 6 pcs 6″x6″x8′ pressure treated boards for the fire pit swing set beams.

Note: You can safely go as long as 10-12 feet with 6×6 beams but prices go up quickly and dramatically for benches over 5 feet long.

  • 6 pcs 2’x6″x8′ pressure-treated lumber for the top braces.
  • 24 pcs 1/2×8″ galvanized lag bolts to attach the beams to the posts.
  • 24 pcs 1/2″ galvanized washers.
  • 24 pcs 4″ deck screws to attach the beams to each other.
  • 24 pcs 3″ deck screws to attach the braces to the beams.
  • Some additional 3″ deck or drywall screws to use for temporarily attaching braces.
  • 10-14 pcs 2″x2″x8′ white pine boards to use as braces, layout posts and anchors.
  • 6-8 pcs 50-60 pound bags of concrete.
  • 6 pcs Paver base for drainage under the posts.
  • 4’ long steel rebar – to mark the centre point
  • Stain or water seal – for the structure
  • Material of your choice for the fire pit
  • Landscape adhesive – to glue the fire pit together
  • Topsoil – to level the area as needed
  • Grass seed or sod – to cover any remaining bare dirt
  • Swings
  • Galvanized or stainless eye bolts or swing hangers with locking nuts and washers, 7”

Tools:

  • A couple of decent A-Frame Ladders
  • Power Miter Saw
  • Post Hole Digger
  • Shovel
  • Sledge Hammer
  • A rock-breaking rod (heavy steel rod with one sharp and one hammer end) if you have a rocky yard.
  • Post level
  • Line level
  • Box Beam Level (preferably a 6-footer or longer)
  • Tape Measure
  • Layout String
  • Speed Square to mark boards
  • Carpenters Pencil
  • Marking Paint – to mark the layout on the ground
  • A Large Plastic Mixing Bin and Hoe – for the concrete
  • Cordless Drill and Bits – for the deck screws
  • 12” long 3/8 in drill bit to drill holes for the lag bolts.
  • 12” long bit to drill holes for the swing hangers, diameter of the bolts or slightly larger.
  • 1 1/4 Forstner or similar bit to countersink the lag bolts/washers.
  • #8 pilot bit for the deck screws
  • Socket and Socket Wrench for the lag bolts
  • Brushes for the stain.
  • Router and round-over bit – to round over the edges of your 6×6 boards (optional)
  • Belt Sander(optional)
  • Gloves and Goggles
  • One or more 6×6 tarps to auger through if you want to keep your grass intact (optional)
  • You will also need to rent a 2-man power auger and an 8 or 10-inch auger bit with an extension. Ask a friend to help with the auger. I used a 1 man auger and it practically killed me. Not recommended.

The process of building your own fire pit swing set

You will want to start with a level area that is maybe 5 feet larger than the structure you intend to build in every direction, or about 25 feet across if you stay close to the dimensions here. If it isn’t perfectly level, that is OK, but you will want to level it AFTER you build the structure. It makes no sense to level first only to have to dig deeper holes for the posts. If possible pick a spot that gets shade for much of the day but it cannot have tree branches directly overhead.

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With hexagons, the distance from the centre point to the outside edge of each post will be a little less than the length of each beam. My fire pit swing set beams were 8 feet long, and the distance from the centre point to the outside edge of each post was 7′ 11″. So the beams opposite each other were 15′ 10″ apart. Don’t dwell on this too much as the easiest way to measure your hexagon, regardless of the beam length you choose, is below.

The other thing you need for your fire pit swing set is the angle of the cuts for your beams. 360 degrees divided by 6 is 60 degrees, split between the two ends of each beam is 30 degrees. So your cuts will be 30 degrees on the end of each beam.

To make the dimensions as easy as possible, I went ahead and cut the beams and laid them out on a flat surface so I could take all the measurements directly from the beams. You have to be a little more exact when digging holes and sinking the posts, but cutting the beams first ensures that your structure is symmetrical.

Just make sure that your fire pit swing set beams are perfectly parallel to the ground before you start taking measurements to make sure that your swings are of the same height. All corner-to-corner measurements should be the same and all beam-to-beam measurements should be the same. While you have the beams on the ground, mark the centre point of each beam so you will have a reference for the cross-braces. Number both sides of each joint 1 through 6. And save some of the 6×6 scrap pieces for later.

Now, making your hexagon square and level is going to be a challenge and you do NOT want to have to lug these 6×6 beams around any more than necessary. So, I cheated. Once I was satisfied with the fire pit swing set beams, I cut the 2×6 boards that I would eventually use for cross braces to be exactly the same dimensions as the 6×6 beams. Now you have much lighter boards to work with as surrogate beams. When you are done with them, you will cut about a foot off of them and use them as cross braces. Nothing wasted.

While you have the saw out, cut one of the 2×2 boards into 1-foot stakes with a 45-degree angle at one end. These will be used as anchors of your fire pit swing set later.

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To create a grid for my layout, I put a steel rod in the center of the space, measured out the length of my beams (8 feet in my case) and painted a circle. That was a good starting point. The posts will end up just inside the circle.

Start with the “front” of the hexagon and either lay down one of your 2×6 mock-up beams or measure out the dimensions and paint the ground where the posts of your swing set will go. If you saved any 6×6 scraps, place one where each post will go just for the visual and to help with measurements.

When you are done marking out for the six posts, the marking for each post of your swing set should be exactly the same distance from the center rod and exactly the same distance apart. I used a field tape-measure with a large hook on it so I could walk to each post of the swing set’s location without having it unhook from the center rod.

Don’t forget to make sure the corners are all the same distance apart (measure the post markings across from each other and make sure the beams will be parallel). This may sound complicated, but once you start laying things out, it isn’t. If you painted a circle at the beginning of this process, all of your post marks should be the same distance from the circle as well.

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OK – time to go get that power auger for my fire pit swing set.

You will want to auger the holes exactly above your marked locations for each post to your fire pit swing set. Make sure the hole is straight. Start without the extension and drill all 6 holes. Then attach the extension and go back around and dig down to just over 3 feet. 3 feet is building code frost-line depth where I live. It is also deep enough to ensure that the structure is rock solid.

Here is a hint. If you have really nice grass that you don’t want to destroy AND your yard is perfectly level, use a couple of sacrificial tarps over the auger hole. Cut a hole in it and let all the dirt from the auger fall onto the tarp. This keeps the dirt out of the grass and allows you to haul any that you don’t use away.

Note: If your location for your fire pit swing set is not perfectly level, you will want to dig to 3 feet on the HIGH side. Use the string and line level to determine how many inches shallower each hole on the low side will need to be. You will end up with all posts at three feet deep into the ground once you level the area with additional dirt.

Take one of your 2×2 braces and mark it at 2 and 3 feet. This will be your depth gauge as you auger.

Mark each 6×6 post at the three-foot mark. I also marked each post at the 6-foot mark to make levelling a little easier.

Now, there are a couple of ways to set and level the posts of your swing set. You could set them and then cut off the tops to make each level, but I wanted to use all 10 feet of my posts, so I actually levelled each post before setting it in concrete. It isn’t as hard as it sounds.

Start with the depth gauge and dig each hole so it is maybe 3 feet two inches deep. Don’t be lazy here. When we get to the levelling step, it will be a lot easier to fill a hole in a little than it will be to take things apart, pull a post out and dig more. Pour some paver base into the hole and flatten out the bottom so the hole is at or just over 3 feet deep.

Drop a post into each hole and check to see where that 3-foot pencil mark you made is. It should be at or slightly below grade or where you expect it to be if the area is not perfectly level. Be careful when placing or removing the post of your fire pit swing set so you don’t collapse the sides of the hole. These swing set posts are heavy, really heavy, so either have a friend help you or pretend you are a Scottish pole thrower and be prepared for back pain later.

Get the posts of your fire pit swing set as close as you can to level. One good way to do this is to tie a string to one of the posts of the swing set at the 6-foot mark that you made earlier (This will be 3 feet from the ground now…). Attach the string level to the string and walk to the 6-foot mark on each of the other posts. We will get them perfectly true and levelled in the next step if your fire pit swing set.

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