How long is the 300-meter widest
Public places stairwells larger, after all, stairway big more style.
This may take into account the width of the staircase, the general residential ladder width should be ≥ 1100 (multi-layer ≥ 1000), to meet the above requirements in the case of the stair can be properly amplified, you said above 300 is not small
This may take into account the width of the staircase, the general residential ladder width should be ≥ 1100 (multi-layer ≥ 1000), to meet the above requirements in the case of the stair can be properly amplified, you said above 300 is not small. Public places stairwells larger, after all, stairway big more style.
