escaleras norma ohsas 1910 espaÑola ntp

ESCALERAS NORMA OHSAS 1910.24

"Angle of stairway rise." Fixed stairs shall be installed at angles to the horizontal of between 30 deg. and 50 deg. Any uniform combination of rise/tread dimensions may be used that will result in a stairway at an angle to the horizontal within the permissible range. Table D-1 gives rise/tread dimensions which will produce a stairway within the permissible range, stating the angle to the horizontal produced by each combination. However, the rise/tread combinations are not limited to those given in Table D-1.

Table D-1

Angulo a Horizontal

Contra Huella (Rise) Huella (Tread Run)Pulgadas Centimetros Pulgadas Centimetros

30° 35´ 6 ½ 16.51 11 27.9432° 08´ 6 ¾ 17.14 10 ¾ 27.3033° 41´ 7 17.78 10 ½ 26.6735° 16´ 7 ¼ 18.41 10 ¼ 26.0336° 52´ 7 ½ 19.05 10 25.4038° 29´ 7 ¾ 19.68 9 ¾ 24.7640° 08´ 8 20.32 9 ½ 24.1341° 44´ 8 ¼ 20.95 9 ¼ 23.4943° 22´ 8 ½ 21.59 9 22.8645° 00´ 8 ¾ 22.22 8 ¾ 22.2246° 38´ 9 22.86 8 ½ 21.5948° 16´ 9 ¼ 23.49 8 ¼ 20.9549° 54´ 9 ½ 24.13 8 20.32

Rise

Tread Run

NORMA ESPAÑOLA NTP 404: ESCALERAS FIJAS