This topic examines the template projects that need expert argumentation. Formwork engineering and supporting system:
(1) Various tool formwork projects: including slipform, climbing formwork, flying formwork, tunnel formwork and other projects.
② Concrete formwork support works: the erection height is 8m or above, or the erection span is 18m or above, or the total construction load (design value) 15kN/m2 or above, or the concentrated line load (design value) is 20kN/m or above.
(3) Bearing support system: It is used for full-house support system such as steel structure installation, and bears a single point concentrated load of more than 7kN.
So choose ABC for this question.