Web page on how to roast a hog! The following is a diagram of how to design a hog roast pit! After one builds the pit they would place the following grate on top! Clear some room on the ground about a 6 ft. by 6 ft. area. Lay down some heavy duty aluminum foil. Place the blocks around the foil like the above diagram shows. Place one bag of charcoil in the pit (leave in bag) soak with lighter ...