Two parallel trenches for foundation

I need to lay out two parallel trenches to pour a level foundation for a metal building. The land is slightly uneven. What is the best way to do that? 18 ft wide by 20 ft long.
Thanks for your help..................
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Please!!! If you have to ask that question, hire someone to do it for you. Truly, you are in over your head. There is no malice in this just good advice.

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There are many here that can give good advice if you understand the general principles involved.
The issues are much too complex to give you a quick answer in usenet. The very fact that you ask suggests it may be beyond your expertise.
Words you will need to understand: batter boards diagonal square builder's level or water level
There is some information at <http://www.quikrete.com/diy/LayoutBasicsforSlabsandFooters.html
Make sure you establish drainage elevations before you begin. How were you going to excavate the footings? Make sure you know where and how to bring in any utilities involved. ______________________________ Keep the whole world singing . . . . DanG (remove the sevens) snipped-for-privacy@7cox.net

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