All the bars were

The difficulty of such work not only in accurate calculations, where the most not big and harmless mistake can cause loss of many materials and time, and the subsequent shrinkage of the building can even be knitted the most accurate calculations. It is better to cut off the doors and windows yourself, it is already built in the box, and only after a certain period of time, so that all the bars were properly satisfactory. This method is still attractive because it does not need to spend a lot of time on it.