High quality external system is designed to be easily erected and dismantled without help from professionals. The “H” frame, or vertical member, has welded square or round pin on top for ease of connection. This allows you to erect the frames faster and to any height with maximum safety and stability. The system is designed not to include any loose fittings inside. The external system’s have a three-way support to hold greater loads and ensure greater stability. The vertical frames (H frames) are available in side ladder type, 3 step ladder, and normal “H” shape. Non-standard sizes are available, by request, for small charge.