bbq: I want to build a concrete BBQ pit. I was wondering whether it would be better to use a bed of gravel or a concrete slab. I live in the northeast and thought using gravel would withstand the temperature changes, and would provide better drainage. Thanks!|||You will need both - place med sizse gravel at least 3 inches under the level of the surround dirt. Make a form to pour a concrete base for your BBQ ; after pouring at least 3 inches of wet concrete mix let it dry for at least a week. You can then safely place bricks, rocks,or whatever combines to make your BBQ pit. Because of the weight of your BBQ, you needed to supply a firm base for it to keep it from sinking in our northeastern soil. Suggestion; build the actual frame out of concrete blocks, line the firebed with firebricks, and cover the exterior with mortared-on rocks picked up from the area, or from a nearby creek - talk about beautiful! If you decide on this option, e-mail me and let me offer some instruction help; I have worked with rocks and concrete for the last 20 years and love to help out others that develop the same passion.|||also add reebar 1/2" at each foot Report Abuse |||yep go with the gravel