You are filling in a few days for the project engineer who is on vacation. The project is a 16 story building. The 4th floor slab was poured on Friday. On Monday you get a call from the design engineer informing that the concrete strength of the newly poured slab achieves enough strength for the purpose of slab formwork & scaffolding removal. Which sequence below is correct?
A/ Removal of slab formwork & scaffolds and moving them up on 4th floor slab; building formworks for columns and shear walls on the 4th floor slab; shoring the 4th floor slab using jacks; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; building scaffolds & formwork for the 5th floor slab to be poured.
B/ Building formworks for columns and shear walls on the 4th floor slab; removal of slab formwork & scaffolds and moving them up on 4th floor slab; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; building scaffolds & formwork for the 5th floor slab to be poured; shoring the 4th floor slab using jacks.
C/ Removal of slab formwork & scaffolds and moving them up on 4th floor slab and shoring the 4th floor slab using jacks at the same time; building formworks for columns and shear walls on the 4th floor slab; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; building scaffolds & formwork for the 5th floor slab to be poured.
D/ Building formworks for columns and shear walls on the 4th floor slab; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; removal of slab formwork & scaffolds and moving them up on 4th floor slab and shoring the 4th floor slab using jacks at the same time; building scaffolds & formwork for the 5th floor slab to be poured.
A/ Removal of slab formwork & scaffolds and moving them up on 4th floor slab; building formworks for columns and shear walls on the 4th floor slab; shoring the 4th floor slab using jacks; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; building scaffolds & formwork for the 5th floor slab to be poured.
B/ Building formworks for columns and shear walls on the 4th floor slab; removal of slab formwork & scaffolds and moving them up on 4th floor slab; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; building scaffolds & formwork for the 5th floor slab to be poured; shoring the 4th floor slab using jacks.
C/ Removal of slab formwork & scaffolds and moving them up on 4th floor slab and shoring the 4th floor slab using jacks at the same time; building formworks for columns and shear walls on the 4th floor slab; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; building scaffolds & formwork for the 5th floor slab to be poured.
D/ Building formworks for columns and shear walls on the 4th floor slab; pouring concrete for the columns and shear walls on the 4th slab; removal of formwork for columns and shearwalls; removal of slab formwork & scaffolds and moving them up on 4th floor slab and shoring the 4th floor slab using jacks at the same time; building scaffolds & formwork for the 5th floor slab to be poured.