In what circumstances should a tower crane be demonstrated by an expert?
Three, lifting and installation, demolition works(1) use of unconventional lifting equipment, methods, and lifting weights of a single piece in excess of 100kN and aboveHeavy lift works.
(two) lifting equipment with lifting capacity of 300kN and above; climbing within height 200m or aboveDemolition of heavy equipment.
Circular of the Ministry of housing, urban and rural construction on Issuing the measures for the safety administration of sub hazardous and sub divisional projectsBuilding quality [2009]87 number]Annex twoMore than a certain size of the risk of larger sub sub project scopeI. deep foundation pit engineering......
