Free-standing lightning protection mast on a tripod H=9000 mm fi 33.7/16/10 RP: I. Free-standing cage mast on a triple weight (tripod). It is used to build elevated horizontal air terminals (protective cages). H1=70mm Diameter 1=10mm Diameter 2=16mm Diameter 3=--mm Diameter 4=33.7mm Diameter 5=42.4mm Diameter 6=18mm °.