Basics in Building Construction

Building Components And Types

Lesson 22 and 23 : Stairs

Dimensions Of A Step

For comfortable ascent and descent, the rise and tread of a step should be well proportioned. The following thumb rules are followed

1. (2 x Rise in cm) +( Going in cm) = 60 cm
2. (Rise in cm ) + (Going in cm) = 40 to 45 cm
3. (Rise in cm) x (going in cm) =400 to 450 cm
4. Adopt Rise = 14 cm and Going =39 cm as standard; then for every 20 mm subtracted from going , add 10 mm to the rise.

Thus, other combinations for rise and going would be 15 cm x 28 cm ; 16 cm x 26 cm; 17 cm x 24 cm.

For residential buildings, the common size of the steps is 16 cm x 26 cm. In hospital etc. the comfortable size of the steps is 10 cm x 30 cm.