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Calculate average existing grade


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#1 Paul James

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Posted 24 January 2018 - 07:01 PM

Is it possible to calculate the average existing grade from shot points on the site plan? 

Here's an example of what I'm trying to do:

 

Step 1: Provide an accurate scaled drawing of the building footprint on the site. The drawing must show the existing topography (using contour lines at 2' intervals). 

Step 2: Show points on the drawing every 10' around the building footprint. For each point, provide spot elevations of the topography as it exists today. 

Step 3: Add up all of the existing grade spot elevations, and divide by the quantity of those spot elevations. This gives you your average existing grade. 



#2 Keith Almond

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Posted 25 January 2018 - 07:58 AM

The simple answer is "YES" ... Using site mode ALL the required tools are available to let you do what you want to do. As long as you know the existing topography you can easily create it in Softplan, and produce the required drawing.

 

You might want to check/confirm your municipalities definition of "Average" ... Our local Municipalities define AVERAGE as halfway between the lowest and highest grades, regardless of the slope of the ground.


Keith

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#3 Paul James

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Posted 25 January 2018 - 01:59 PM

I was more referring to setting up soflist to calculate the average from this example- add up all the existing grade elevation shot points placed around the building outline and dividing by the number of points.
Yes our local cities have different required ways of determining this. This is the method this particular city uses. Another wants a line 25' up parallel to the slope.

#4 Keith Almond

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Posted 25 January 2018 - 02:38 PM

Apologies ... I missed that this was in the Softlist forum.


Keith

There are 10 types of people in this world ....... Those who understand binary, and those who don't.

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www.homehardwarekingston.ca




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