HOW CAN THEY DO THAT ?????
The Delhi Metro Rail Corporation (DMRC) had given the job of designing and construction to Gammon India and the reason given by the authorities was that it was done to save costs. What a horrendous decision is this.
This is something like giving a caterer a lakh of rupees to prepare lunch for a thousand people and also giving him the freedom to choose the menu. Obviously he is going to serve you with Curd Rice and pickles while he prepares a feast for himself with the rest of the money. This is exactly what Gammon India have done for Delhi Metro Rail lines. Unfortunately just as sometimes the curd gets sour even before it is served, so has the structures built by Gammon India.