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As per NBC 2005,for institutional buildings like hospitals, what will be the minimum width of the stair case, minimum width of the tread and maximum heightofriser?
Minimum width of staircase โ 1500 mm, minimum width of tread โ 250 mm and maximum height of riser โ 190 mm.
Minimum width of staircase โ 2000 mm, minimum width of tread โ 300 mm and maximum height of riser โ 150 mm.
Minimum width of staircase โ 2000 mm, minimum width of tread โ 250 mm and maximum heightof riser โ 170 mm.
Minimum width of staircase โ 2500 mm, minimum width of tread โ 300 mm and maximum height of riser โ- 150 mm.
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