If cooking several racks of ribs, use a rib rack and place the meat side of the ribs facing the fire. Add the smoking chips and cover the grill. On average, beef ribs will need about 3 to 5 hours of cooking time, depending on the thickness of the meat and other factors such as weather conditions.
Mild steel (red iron) and carbon steel contain manganese. Manganese can cause Parkinson's disease, which cripples the nerves and muscles. Zinc in galvanized metal or in paint (on welded surfaces) can cause metal fume fever. It feels like the flu and goes away in a few hours or days after exposure ends.
Oxygen in the air, on the other hand, is an extremely reactive and corrosive gas and will literally cause most metals to burn. Nitrogen is also reactive at high temperatures, and will cause brittleness in the weld. Sometimes CO2 is used as a shielding gas, particularly in MIG welding of ordinary steels. CO2 is slightly reactive, but it is inert enough towards iron and steel that it generally does not cause problems.