... , section:1.5×1.5×2.2m, Upper level: ∠63×6, Diagonal brace ∠75×6.3,Bottom girder:22beams, the whole girder is ... 6 meters, the half girder is 3 meters.4,Rotating units: ... type(m)90HoistmechanismDouble falls speed(m/min)50.42/25.6/7Motor /Slewingmechanismspeed(r/min)0-0.64Motor /Trolleying mechanismspeed(m ...