A suspension bridge is one whose support comes from steel cables that are attached to piers and to the ground on either side of the bridge. The deck of the bridge (the part that is walked or driven upon) is below the cables. This differs from other types of bridges that create support from under the bridge. Suspension bridges rely on the tensile strength of the steel cables to carry the weight to the piers and to the ends on the ground. Note that there is additional support within the construction, but even that weight is carried to the piers by way of the steel cables.