Another *** not nice, since the casualties *** example of how ductility of steel can show. Seeing spandrel beams that have lost restraint bent like paper is just another.
Surely too many cranes still fall, also here, of variegated kinds. Lately perhaps a bit less since the material status is a bit newer and maybe more proper qualifications of the workers. As in building collapses (most) I really see more a problem in these failures with workmanship (they use to happen here when in works) than with materials, for except by stringent (outer?) inspection we are rarely to get rid of aged-materials' failures.
Maybe a bit of order in the performance of the workers in the field may help, not being allowed to be chiefs of the team but after some number of crane mountings etc. This way some good practices (especially revision of the material status of members, connections and guards, and sound appraisal of permissible equilibrium) can permeate to the entrants on the field, for even in the seasoned workers the "can do" actitude is a source of risk with cranes.
