hinged brace 544 a 544 b of the tank support 540 may be connected to each other at their inner ends with a hinge and may be connected at their outer ends to the fixed braces 542 a 542 b with hinge brackets a clamp such as a screw clamp 546 may be used to secure a bottom flange of the tank 10 to the tank support 540 in one embodiment the skillet 400 has an outer diameter of about 44 inches and the cooking surface 408 has a diameter of about 33 inches the firebox 200 is about 33 inches on each side the opening of the firebox 200 has a diameter of about of about 28 inches the concentric burner elements 302 a 302 b 302 c of the embodiment of the burner 300 have diameters of about 28 inches 20 inches and 13 inches respectively the spiral burner element 310 of another embodiment has an outer diameter of about 28 inches the legs 512 of the base 500 are about 24 inches high and the fixed braces 516 are about 21 inches long the hinged braces 518 are about 21 inches long and each section is about 10 5 inches long the braces 542 a 542 b of the tank support 540 are located about 5 625 inches from the lower fixed braces 516.