Making a grill out of an oil drum can be a fancy or simple project. Essentially, all you need to do is cut a drum in half lengthwise, clean and sand it, build a frame, drill vent holes and lay in charcoal and grills. However, you can get much more elegant if you want to build a permanent backyard fixture. An elaborate rack to hold the grill, paint jobs, custom handles and other embellishments can improve on the basic design.
Stones or brick make good material for building a permanent barbecue grill in your backyard. Get a concrete pad to build on, and build an enclosure out of brick or stone and mortar to hold the grill. A simple option would include a small stone box with ventilation, a charcoal pit and a rest for grills. A more complex build could include a countertop installation for working on next to the grill or a smoker chamber for a combination smoker and grill unit.
A firebox style barbecue is usually built of brick or stone as well. However, a simple one to build could also be built from cindercrete blocks instead. Simply build a box from the blocks that is tall enough to build a strong wood fire in. Either lay a rack across the top of the firebox for grilling, or mount it inside the box to get more heat containment.
The traditional pit method of barbecue involves cooking meet in an actual pit in the ground. These pits are the simplest of all to build. Simply dig a hole in the ground big enough to build a bed of coals and to lay in a grill and meat. About 3-feet deep should work for all but the biggest meals. Build a fire until you have a deep bed of coals. Lay in a permanent grate or a temporary grill from green wood, place your meat on top, cover the hole and let the meat cook.