Data hmasa ber
lifting sang tak a ni 2500 mm
Plan-a staircase sei zawng chu 3000 mm
Platform zau zawng 800 mm
Step zawng zawng 13
rotary step hrang hrang a awm 3
Turning step thlengin 4
Step thickness a ni 50 mm
ledge step hrang hrang a awm 50 mm

Step size hrang hrang
Step San zawng a ni 192 mm
Step thuk tak a ni 417 mm
Riser san zawng a ni 142 mm
Inner corner ah chuan turning step te a awm 30°

stair string a ni
A chunglam bowstring hmalam sei zawng 2484 mm
Upper string chu a sei zawng zawng a ni 2937 mm
Bowstring hnuai lam hmalam sei zawng 2070 mm
Bowstring hnuai lam sei zawng chu a khat vek tawh 2523 mm
Bowstring a thuk zawng a ni 238 mm
Step hnuaia cut inkar bowstring-a hlat zawng 414 mm
Ladder angle a awm 27.7° floor level atanga lak a ni