Use the jigsaw to cut the barrel in half lengthwise. One half will be the pit. The other half will be the lid.
File and sandpaper any sharp edges left by the jigsaw.
Drill a spread of 4-inch holes on the bottom of the pit half. These holes will allow air to enter, which is necessary to keep the charcoal burning.
Cut a metal grate to rest on the curve of the pit half 2 inches from the bottom. The charcoal will rest on this grate.
Drill holes for the angle brackets to hold the grill in the pit half. The grill needs to be about 8 inches from the top of the charcoal. Locate the brackets 5 inches from the sides. Secure them with nuts, bolts and washers.
Drill holes for the handle in the center of the lid. Attach the handle with bolts, washers and nuts.
Drill matching holes for the hinges at the rear of both the pit and lid. Place the hinges about 7 inches from the sides. Bolt and tighten the hinges to connect the pit to the lid.
Weld the pieces of 3-foot rebar into two x-shaped pieces to make a stand. These are end pieces of the stand. Weld the 4-foot rebar to join the end pieces.
Sit the barbecue grill on the stand.
Spray paint the exterior for a more attractive grill using heat-resistant paint.