Logged in as: Public User

IH 43 NB at IH 39 SB Off Ramp

Question
State WI
Description Text

We have a situation (see photos) where a wing wall is falling away from a bridge parapet.  The maintenance staff has stabilized the wing wall, but there is still an issue with snag.

 

In 5 years the bridge will be replaced, but I don't want to leave this like this until then.

 

I was thinking that it may be possible to

1.       Put an angled metal plate (1/2" A36 with some reinforcing struts and bolts to attach it to the parapet) over the snag point

2.       Place additional thrie beam or beam guard placed near the toe of the parapet it (with appropriate blocks and connections) and have the  additional thrie beam bend around the thrie beam transition.

Do you believe that either of these alternatives are feasible?  Do you have other suggestions?

 

Keywords
  • Approach Guardrail Transitions
Other Keywords none
Date August 14, 2012
Attachment IMG_0233.JPG
Attachment IMG_0236.JPG
Attachment IMG_0237.JPG
Attachment IMG_0238.JPG


Response
Response More photos
Date August 14, 2012
Attachment IMG_0239.JPG
Attachment IMG_0240.JPG
Attachment IMG_0241.JPG
Attachment IMG_0242.JPG


Response
Response One more.
Date August 14, 2012
Attachment IMG_0244.JPG


Response
Response

This one may be somewhat difficult but I offer the following:

(1)    Bring w-beam rail away from sloped end or buttress with additional blockout.

(2)    Within sloped end region, connect symmetric W-beam to thrie beam transition.

(3)    Block W-beam to thrie beam transition away from sloped end as well.

(4)    Connect nested 12-gauge or single 10-gauge thrie beam to downstream end of 10-gauge W-T section and attach across shifted/exposed joint.

(5)    Block thrie beam away from parapet and slowly taper back to parapet face at end of 12-ft 6-in. section to reduce wheel snag concerns.

(6)    Use thrie end shoe to anchor thrie beam to downstream parapet.

This is the best that I could come up for short turnaround.

 

Date August 14, 2012


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.