The monorail project witnessed its second major accident on Thursday morning after a beam weighing about 60 tonnes collapsed on a crane at Bhoiwada naka in Parel.
No injuries were reported as only one end of the beam collapsed on the crane.
According to the Mumbai Metropolitan Region Development Authority (MMRDA), the beam was being lifted by two cranes — hydraulic and lattice boom — on to the pillars.
The wire of the hydraulic crane got entangled with the metallic structures of the pillar. When the driver pulled the beam up, the wire snapped.
“Due to the rain, the lifting supervisor and the crane driver didn't realise that the rope was entangled. Both the beam and the hydraulic crane were damaged in the collapse,” said Dilip Kawathkar, joint project director (PR), MMRDA.
The 20-km Chembur-Wadala Jacob Circle monorail corridor is being constructed by L&T and Scomi Engineering.
The beam launching was being carried out in the night to avoid traffic snarls during the day. Sudhir Badami, a transport expert and structural engineer, said, “When it is raining, the conditions do not remain ideal.
Due to change in soil levels, the launching angle of a crane can change,” he said.