- The all-welded, a-frame pylon straddles the deck .
- The a-frame pylon harmonizes with the tall spires of the adjacent cathedral .
- Mobile front-bucket loaders often suffice for handling and retrieving rock in a-frame structures .
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 a 45-degree or less angle, attached at the top.