ALUTRUSS U-Frame Base Part is a single aluminium tube frame with QUICK-LOCK connectors for the Singlelock SP 1 system. Each frame must be connected to the frame above at two points using the enclosed connectors. The frame has two welded eyelets for securing with appropriately sized steel cables or chains. It uses 50 mm trusspipe and measures 60 × 5 × 55 cm, with a point-load capacity of 100 kg and a weight of 2.45 kg.