A-frame

"An A-frame is a basic structure designed to bear a load in a lightweight economical manner. The simplest form of an A-frame is two similarly sized beams, arranged in an angle of 45 degrees or less, attached at the top, like an uppercase letter ´A´. These materials are often wooden or steel beams attached at the top by rope, welding, gluing, or riveting.

A-frames can be used as-is, as part of shears, or set up in a row along a longitudinal beam for added stability, as in a saw horse. More complex structures will often have crossmembers connecting the A-frames at different angles, forming a truss." - (en.wikipedia.org 09.01.2022)