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Post-casting, broken open[modifier]
Post-casting, cut open[modifier]
Perimeter slab edge joint with incomplete firestop.
Main Gallery: Firestop
- Concrete structures often have a fire-resistance rating, due to concrete's excellent fire-resistance. Openings must be firestopped to comply with building codes in order to restore the rating of the assembly.
Secondary efflorescence: Osteoporisis of the concrete.