Sterling Atlas 1/2in Rigging Line13mm Diameter Tensile Strength: 10,800 lbs Made by Sterling. This 1 2" Atlas rigging line is the workhorse of the Sterling arbor rigging lines, offering a perfect line for standard duty rigging. The Atlas has a redesigned double braid construction that provides a huge increase in overall strength, while lowering the static elongation, but still allowing the rope to absorb impact forces and limiting peak forces when catching wood in negative rigging