As stated in the title this fire pit cost me about $110 for the raw materials. The inner diameter is 40 in (102 cm) while the outer is 54 in (137 cm). I purchased materials from both Home Depot and Lowes and I recommend visiting both because they had different block colors and sizing if you want to create a variation of this pit.

Raw Materials: 6 bags of .5 cu ft of drainage gravel (Lowes)
                           42 Retaining Wall Blocks (Home Depot)
Tools Needed:
                            Rubber Mallet
                            Angle Grinder with concrete-ready blade (only needed if you get blocks that do not have two level faces)

Step 1: Place 14 Blocks in Circle

You could use a string and two pencils to mark out a more perfect circle, but I found it easiest to just lay the blocks in the best circle I could. Then, use a shovel or a stick to mark the outer and inner edges of the blocks.

I would also like to note at this point that you could use any number of blocks for different size fire pits and 12 would actually be the easiest to set up because the angles work the best. I chose 14 simply because I liked that size.
Have u had any blocks crack?
Nope, all the blocks have been okay so far.
<p>All in all this is a well thought out and built fire pit. I am very glad to see the drainage work that was done. This is a step that a lot of people either short cut, or leave out altogether.</p><p>However, I do not like the 'stone supplier' saying that a steel liner will not protect the stones. A wood burning fire pit can create fierce heat, and the stones absorb that heat. If the fire is stronger/closer to one side of the fire pit, it will develop a hot spot. A steel liner spreads that heat around its whole surface area, thus reducing the hot spot, which will otherwise ultimately damage the stones.</p><p>Also a steel liner reflects the heat back and up, to where we can appreciate it, whereas the stones will absorb more of the heat, and leave less for us.</p><p>If you are going to the trouble of building a fire pit, it is not only easier, but also much more durable if you use a steel liner.</p>
<p>Should i use type S mortar to make the joints better and a little more secure. it will also add some height to the blocks so that way i could maybe save some more money by not having to buy more block. i work at Lowe's so i can already get some stuff cheap, but i swear... i must have had a Jewish ancestor somewhere along my family tree because i am just such a penny pincher. i already asked they guy in commercial and he said he would have to look it up so i sent him the link to this ible, we'll see tomorrow.</p>
As long as you do not build the pit too high then the weight of the blocks alone should be be fairly secure. This is especially true if you build a pit smaller than mine so that the blocks align in their natural angles. It could help tie things together though as you said. And it would probably look nicer since you could fill in the gaps. Just be prepared for a good deal more work. I myself would not recommend putting mortar in between the layers of blocks (to increase height) as it would be a ton of extra work and I personally think it would not look as nice. If you are that concerned about stability you can use construction adhesive to glue the blocks to those below them.<br><br>Hope this helped
Very nicely done.I'm looking to build something similar in my own backyard.This gives me a good start.Thank you!

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