I do not agree with this at all! DIN 128-50 is for "General principles of presentation". For architectural/civil engineering purposes we have to use the DIN 1356-1. Interestingly enough both DINs do mention some materials for buildings, for example non-reinforced concrete. DIN 128-50 says for this material a hatch is to be used with one solid line and two dashed lines. This sort of hatch is never used in architectural disciplines. Instead of this we use a hatch with dashed lines only as described in DIN 1356-1! Hatches according to DIN128-50 would be useless. The hatches mentioned in DIN1356 are already implemented in the german version!