Answer to Question #257337 in Civil and Environmental Engineering for Nits

Question

A sloping distance is measured with a 30-m steel tape. The measurements made are 30.00 m on a 7 degrees’ slope; 26.37 m on a 15 degrees’ slope and 29.50 m on a 1:2 ½ slope (V:H). (use the approximate slope correction formula for gentle slopes) 1.1. What is the corrected horizontal distance in the first segment, in meter, (S1=30.00 m; slope is 30 degrees)?

Answer 1

To calculate the slope, proceed as follows: 

• along the axis of the slope, measure the difference in level AC between two marked points A and B
• measure the horizontal distance CB between points A and B
• calculate the slope S in percent as equal to

$S\%= 100AC\times CB$

to make your calculations easier: 

• you can fix the horizontal distance CB at 100 m, which will give you S% = AC directly in metres;
• you can fix the horizontal distance CB at 10 minstead, which will give you S% = 10 AC in metres.