Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
This drawing shows the S-250 shelter dimensions:
http://www.gichner.us/s-250-G.pdf
Here's another document with a different drawing, plus a pretty color picture:
http://www.gichner.us/s-250.pdf
What kind of truck are you thinking of mounting the shelter on?