Rebar corrosion at beam soffits may well require overhead get entry to tools, correct formwork

https://augustmgyf615.brightsora.com/posts/concrete-resurfacing-guide-for-retail-parking-lots-prep-to-cure-times

Rebar corrosion at beam soffits would require overhead access approaches, right kind formwork, and repair mortars that bond and healing with out sagging.