Demolition of the stairs to be what amount of calculation, respectively, how to calculate,
more different materials, respectively, by area, length, etc. separately calculated.
Your problem is more general, the stairs have a cement-based,
Your problem is more general, the stairs have a cement-based, all-steel, staircase stepping decoration, staircase handrail decoration works, more different materials, respectively, by area, length, etc. separately calculated.
