The illustrated saddle supports the steam drum and is bolted to rubber shock mounts, which sit on top of feet which are fixed to the hull.

The illustrated saddle supports the water drum and is fixed firmly to the support base by bolts through the saddle's flange. The support base sits on top of feet welded to the hull of the ship.

The illustrated saddle supports the boiler fire brick and prevents it from breaking by absorbing any shock.

The illustrated foot is the sliding foot located underneath the front or rear of the water drum, depending on the type of boiler, and allows for expansion or contraction of the water drum.