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.
The presence of any metal (ferromagnetic or not) causes large distortions in the magnetic field and significant susceptibility artifacts. The range of signal loss depends on the metal and on the pulse sequence (spin echo, gradient echo).