Arranging branches from a standpipe on the different floors, one should take care of the movement of the standpipe self due to its elongation, thinking to absorb such movement in the following way:
1. set the standpipe in the right point of the shaft, so that the distance LAS is calculated according to the diagrams
2. leave some space to the pipe branch, to absorb the elongation;
3. instal a compensation line with an elbow;
4. by rigid standpipes, a fixed point is necessary immediately after the defamation, so as to avoid unexpected pipe movements.