Recommended Gradient as Per I.R.C

30th August 2018 0 By Malay Sautya

Recommended Gradient As per IRC

Recommended gradient as per I.R.C for plain terrain, mountainous terrain and step terrain:

1. Plain or Rolling Terrain

Ruling gradient:- 1 in 30 (3.3%).
Limiting gradient:- 1 in 20 (5%).
Exceptional gradient:- 1 in 15 (6.7%).

2. Mountainous Terrain

Ruling gradient:- 1 in 20 (5%).
Limiting gradient:- 1 in 16.7 (6%).
Exceptional gradient:- 1 in 14.3 (7%).

3. Steep Terrain

Ruling gradient:- 1 in 16.7 (6%).
Limiting gradient:- 1 in 14.3 (7%).
Exceptional gradient:- 1 in 12.5 (8%).

Note: The maximum gradient at hairpin bend shall be 2.5 % for mountainous and steep areas.

Read Also:

 Recommended Roadway Width, Shoulder, Carriageway Width As Per I.R.C

Recommended Standards For Building line & Control line For Plain & Rolling Area

Classification of Road