for the lazy:
Cheap chrome or nickel plated wire grates such as the Weber Hinged Cooking Grate
Best in BBQ Bronze Medal
Yes, they warp under extremely high heats. Yes, after a year or two they pit and the plating chips off, then they rust, and you've got to heave them. But they're so cheap that replacing them is not painful. Their chief advantage is that they stay out of the way of radiant heat from below leaving the surface open for real searing. They're the next best thing to no grates at all. The only love they get is from this Meathead.
Much better than the grate that came with your 22.5" Weber Kettle, this hinged grate let's you easily add charcoal for long low and slow cooks. Made from nickel-plated steel, you just lift the flap and drop in coals. No fumbling to lift up the whole grate only to have your meat slide off and onto the coals. Yuk. They are perfect for adding coal to the Smokenator, something you must do on long cooks, and it even works with GrillGrates which are cut to leave room for you to lift the hinged section.
If you have a Weber Kettle, I strongly recommend you upgrade to the hinged grates so you can easily add more coals and wood. Click here to order the Weber Hinged Cooking Grate.