Standards: ASTM D 1586 | INV E 111 Tripod built in 2 1/2 "diameter lightweight tubing, 2.5 mm thick, divided into 3 2m lengths. End tips that allow you to kneel in soft ground and holes to anchor with bolts on hard surfaces. 8 HP engine Bridge Straton brand, reducer and winch on a base that is anchored to one of the tripod supports during work and 15 m of 1 "manila. Employed in SPT trials.