Logged in as: Public User

Foundation Tube Lengths 5 ft or 6 ft

Question
State NE
Description Text I have two lengths of Foundation tubes 5’ – from older NDOT plan & 6’ - from the recent Bullnose testing using thrie-beam.
Is the 5’ for w-beam still acceptable with the MASH approved loads?
Or should I switch to the 6’ only? 
Keywords
  • End Treatments & Crash Cushions
  • Guardrail
Other Keywords none
Date October 24, 2017


Response
Response

We have been using the 6’ foundation tube for use with the MGS due to the increased rail height affecting the loading of the anchorage during initial development of the system.

 

For the bullnose system, we would recommend similar length foundation tubes for anchoring a free end of the system. Note that the BCT posts adjacent to the nose of the system use 8’ long foundation tubes as only a single foundation tube is used for anchorage adjacent to the nose.

 

Thanks 
Date October 24, 2017


Contact Us:
130 Whittier Research Center
2200 Vine Street
Lincoln, NE 68583-0853
(402) 472-0965
Email: mwrsf@unl.edu 		Disclaimer:
The information contained on the Midwest Roadside Safety Facility (MwRSF) website is subject to change without prior notice. The University of Nebraska and the MwRSF is not responsible or liable, directly or indirectly, for any damage or loss caused or alleged to be caused by or in connection with the use or misuse of or reliance upon any such content, goods, or services available on this site.