Site Grading - MINIMUM slope errors
Posted: Thu Mar 02, 2017 11:39 am
This is an example of the most common error in site grading.
DO NOT use sketch circles to check the MINIMUM slope. You must measure the path that water will take downhill. Use sketch lines...shown in red. Sketch circles can only be used to measure a distance that is a straight line...basic geometry.
The green dimensions total 56'-0" even though the tips of the topo lines are within 50' of each other. Same for the blue dimensions at 65'-0" apart.
This file has better resolution. Thanks to mandyk650:
DO NOT use sketch circles to check the MINIMUM slope. You must measure the path that water will take downhill. Use sketch lines...shown in red. Sketch circles can only be used to measure a distance that is a straight line...basic geometry.
The green dimensions total 56'-0" even though the tips of the topo lines are within 50' of each other. Same for the blue dimensions at 65'-0" apart.
This file has better resolution. Thanks to mandyk650: