Column box or shuttering for columns is made of plywood sheets or steel sheets
fabricated with adequate stiffeners. Thin films of oil or grease should be applied to
inner surface of the shuttering to enable easy removal of the column after the
concrete hardens.
Precast concrete walls are constructed by casting concrete in a reusable wall
mold or form which is then cured in a controlled environment, transported to the
construction site and lifted into place. The main function of the precast walls is to
speed up the construction process.
Casting of foundation would mean completion of all substructure work which is
below the ground. That would mean finishing excavation and concreting of all
foundations and the work for superstructure above the ground to commence. This
is also referred to as completion of plinth work by some builders.