A side arm with a single tee is a simple rigging accessory used in stage and event production to extend a single mounting point away from a truss, pipe, or vertical structure, allowing lights, speakers, or other equipment to be positioned off to the side rather than directly underneath. It typically clamps onto a main tube and provides a perpendicular horizontal arm with a single tee connection, making it useful for spacing fixtures evenly, avoiding obstructions, or creating cleaner sightlines. This type of side arm is commonly used in lighting truss systems, broadcast rigs, houses of worship, and corporate events where precise placement and flexibility are needed. A single‑tee side arm is designed to be strong, quick to install, and easy to adjust, helping technicians fine‑tune layouts while keeping the overall rig compact and organized.