Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Ground Mat earth grid design software

Ground Mat earth grid design software

Ground Mat earth grid design software

I am using Ground Mat to check the designs of a number of external substations in an existing factory. Adajacent to the substations are building foundations which have been bonded to the existing earth grids.

How do I simulate these foundations in Ground Mat?


RE: Ground Mat earth grid design software

Yep - sounds like a plan!!!

RE: Ground Mat earth grid design software

I am not sure, if modelling and connecting building foundatons will help in learning more about the Grid in question.  

RE: Ground Mat earth grid design software


Building foundations can be used as ground electrodes. In this case there are large building foundations adajacent the substations. These foundations are 6m in depth. There are also foundations in the substation compound. The transformes are situated on concrete pads with foudations approximately 1m in depth.

For more inforation regarding building foundations being used as ground electrodes google UFER.

RE: Ground Mat earth grid design software

Hi jpflying
The Foundation Grounding is very useful if it is designed and dedicated for grounding purpose.
The rebar dedicated for grounding has to be 10mm dia at least, and electrical continuity has to be assured by good welding. A grounding ring at the lowest level will collect all the groundings from all foundations and from here all the electrical equipment will be bonded.
If it is so designed, you may introduce it in the calculation as a grounding rod. Of course,it is still conservative, as the adjacent vertical rebars will decrease the total resistance.
We don't use the SKM Ground Mat software so I can't tell more.

RE: Ground Mat earth grid design software


Thanks for the reply.

I am based in Australia and the code here only requires the rebar to be tied with tie wire. The job I am looking at has other grounding electrodes in the system - copper sheathed steel vertical rods and copper horizontal grids, but these vary in size in the different areas of the installation. The footings I am interested in all have rebar larger than the 10mm - some of it is up to 32mm in diamaeter. In a couple of areas I am having problems with the touch potential and due to concrete floors everwhere adding more electrodes into the ground is not very practicable, hence the interest in the existing footings.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close