How to Calculate Gradient, Run and Rise in Civil Construction.
In this Article i will calculate the slope, run & rise in the three different drawings as shown below.
1 – Slope calculation.
Given Data.
Run = 15m.
Rise = 0.5m.
Slope = [run ÷ rise]
= [15m. ÷ 0.5m].
= 30
Learn More
-
The Role and Responsibilities of QTY Surveyor in the Current Field Of Construction Sector
-
Quantity Survey and Type Of Estimation
-
Why Camber Provided In Road
-
Transition Curve In Highways – Purpose-Requirements-Example
-
Super-elevation And Design Formula | Advantages | Highway Engineering
So, we should provide the gradient or slope of 1: 30
2 – Run calculation.
Given Data.
Slope = 1: 100
Rise = 0.5m
Run
= [ slope x rise ]
= [ 100 x 0.5 ]
= Fifty m.
So, we have to provide a ( Fifty m ) run for every 0.5m rise.
3 – Rise calculation.
Given Data.
Slope or gradient = 1:30
Run = Eleven m.
Rise
= [ run ÷ slope ]
= [ 12m. ÷ 30 ]
= 0.4-m. or 400-mm.
Learn More
-
What is Alignment Of Road.
-
linear Measurements In the Surveying by direct Method
-
What is the benefits of Drawbacks Of total Station
-
Basic Thumb Rules For Civil Engineers
So, for a 12m run, u have to provide the 0.4m. or 400mm. rise.
4 – Rise per meter calculation.
When we make roads, we cannot provide the rise for the total length as the work should be done in the different phases. In such cases, we have to calculate rise per meter run.
Rise
= [ run ÷ slope]
= [ 200m. ÷ 100 ]
= Two m.
Here,
For 200m run, rise = Two m
For One m. run, rise =?
By cross multiplication,
[One m. × Two m.] = [rise/m. × 200]Rise/m. = [( One m. × Two m. ) ÷200 ]
= 0.01m. or Ten mm.
If you want to provide a gradient for the Twenty m. run of the above-given road,
The formula is
= [ rise/m. × run length ]
= [ 0.01m per m. × Twenty m. ]
= 0.2m. or 200mm.
Other Post
-
How To Calculate The Asphalt Quantity For Road.
-
Thumb Rules For Civil Engineers In Building Construction
-
Basic Components Of Road Work Structure
-
Types Of Scales In The Surveying.