The stairs one hand stainless steel ball luminous?
Calculation of the amount of work, nothing more than the volume of concrete, steel weight. As in the general floor, only different is the ladder of plagioclase; structure calculation, is nothing more than the load and reinforcement.
Now people love to spend energy for hundreds of "formula", and a simple triangle relationship add, subtract, multiply and divide, also according to what "formula", that a lot of English uppercase lowercase letters, Greek letters, the simple things get complicated, it is getting dizzy, why bother. Is a bench length? The width ratio relationship is still. Formulas are forms and essential.
