No, no. The building is not owned by any garments fatory. It is owned by some irresponsible Rana. Many owners mistakenly think a building can stand well on its feet whatever may be the subsoil conditions, lengths/diameters of piles, strengths of superstructure consisting of columns, beams and floors. In many other cases, owners force the designer and contractor to reduce the sizes of columns, beams and floors, and reduce the area of steel bars in order to reduce the cost.
Yet, in some other cases, the designers do not follow the design rules set out in the US design codes like ACI, ASTM, ASCE or ANSI, or similar British codes and standards. Most of them in BD do not even know that these standards exist. For example, the ACI code specifies the live or imposed load on the floors to be 400kg/m2 for public buildings like cinema, theater, shopping center, office buildings etc. where a heavy concentration of human movements are expected many times in a day.
I doubt, the design engineers or the owners care much about these things. Their moto is 'There will be no problem,' but then there are collapses like this.