Heelpost, commonly known as a B-post, is a structural component in automobile manufacturing that supports the passenger doors. This crucial component can also be referred to as a pillar, post, column, or upright. It is made up of high-strength steel and is designed to withstand high-impact collisions. Other synonyms for heelpost include side post, center pillar, quarter panel post, and roof rail. The heelpost is an integral part of vehicle safety features, providing support for seat belts, airbags, and other restraint systems. Despite the varied names, the importance of this component remains the same across automotive design.