Retaining pole strut is an important support element used to increase the stability of structures and meet lateral loads. Buttresses help balance lateral pressures, often by providing additional support to vertical retaining walls or similar structural members.

A retaining pole pier is an inclined or vertical support member used to support and stabilize the vertical member of a structure. Buttresses are used to balance the lateral forces carried by the retaining poles and to prevent the structure from tipping or sliding.