Making The Grill BaseAn easy way to build a support system for the grill is to use your firebrick. Just pull two firebricks forward from the rest of the firebrick. If you think of the shape as a clock, you'll pull bricks forward at 12, 3, 6 and 9 o'clock then you can rest your grill on the supports to cook or remove it if you just want to sit around the fire.
Setting Caps You should dry-set four or five of your larger capstones on opposite sides of the fire pit before using mortar. Use your long level (four feet or more) to make sure your capstones are just about level. When you start to mortar, make sure you mortar the guiding capstones first (figure K). It's important to get them as level as possible, both individually and in relation to the other capstones (figure L).
If you're building the grill, remember to cut the interior capstones in such a way as to allow the grill to be placed and removed easily (figure M).
Tip: When you are capping, it's always a good idea to use a short level. That way you can check the level across and also from front to back.
Once all of the capstones have been mortared in place finish jointing, remove any excess mortar along the fire pit. To create the finished surface on the top of your fire pit, fill the joints with mortar then brush them clean (figure N).
Flagstone Surround (optional)
Dean and Derek wanted to give the fire pit a more substantial presence in the yard, so they added flagstone stepping-stones around the fire pit.
If you wish to do do this, simply place the flagstone around the exterior of your fire pit, packing soil beneath the flagstone to prevent them from moving.
Finishing Touches
To create the masterful finish you desire, pour half-inch P-gravel into the center of your fire pit. You have the option of setting logs or coal on the P-gravel. With that, your outdoor fire pit and grill is complete.