I am in the process of updating the working width information for out temporary barrier to MASH. So I have to do some adjustment of the NCHRP test to MASH.
Could you take a look at what I have to see if I am on the right track?
If the DOTs have to go to MASH. It would probably be a good idea for MwRSF to come up with recommendations on what the working widths should be ( until we test the alternatives to MASH). You are probably going to be asked the same question over and over and a consistent answer would help all the states.
I attached a spreadsheet I put together to do the calculations an pick a “rational” number. I’m not saying it is right, but this looks to be the direction I’m heading in.
I would agree that this probably needs some thought. Mostly along the lines of deflections for the tie-down applications. I see that you are currently scaling up the tie-down system deflections based on the free-standing MASH versus 350 deflections. I think that may be too conservative as we don’t expect that kind of jump in deflection for the anchored barriers.
I will try to give this some more thought and come up with some numbers. I believe that TTI has some MASH testing of tie-down barriers from with similar 350 testing that could be looked at.
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