-Roof Trusses and the work below

As the roof truss fabricators start to assemble the roof trusses, work continues underneath the protection of the 2nd floor slab.  Exterior and interior concrete hollow block (CHB) walls are laid straight, or atleast tried to be.  Concrete stair rebars are laid, formed and poured.  And initial plastering work begins.

As the walls are plastered and the structure is slowly enclosed, the dimensions of the rooms, the space for openings, and provisions for stairs are carefully checked and rechecked so that all the design elements and utilities indicated have space when they are installed eventually.