Data hmasa ber
lifting sang tak a ni 2500 mm
Plan-a staircase sei zawng chu 3000 mm
Platform zau zawng 800 mm
Step awm zat 10
Bowstring hnuai lam ah step a awm 3
Step thickness a ni 50 mm
ledge step hrang hrang a awm 50 mm

Step size hrang hrang
Step San zawng a ni 250 mm
Step thuk tak a ni 417 mm
Riser san zawng a ni 200 mm

stair string a ni
A chunglam bowstring hmalam sei zawng 2663 mm
Upper string chu a sei zawng zawng a ni 3067 mm
Bowstring hnuai lam hmalam sei zawng 1775 mm
Bowstring hnuai lam sei zawng chu a khat vek tawh 2180 mm
Bowstring a thuk zawng a ni 276 mm
Step hnuaia cut inkar bowstring-a hlat zawng 444 mm
Ladder angle a awm 34.3° floor level atanga lak a ni