One of our contractors is in the process of relocating a run of the MwRSF TCB that was pinned through the asphalt with the 38mm dia x 978mm long A36 steel pins. They are having a very difficult time pulling the pins out, most likely due to the extreme cold temperatures we are having. For future installations we would like to consider specifying slightly larger diameter holes, say up to 45mm (1-3/4") diameter holes, to ensure pins could be pulled easier in future. We would also like to consider a threaded top on the pin in order to use double nuts and square plate washer as an alternative to the welded steel top plate. This would allow other devices to be attached to the pin during removal.
Please advise if you and/or contractors using the MwRSF TCB have experienced similar problems during pin removal, and their solution.
Please also advise if it would be advisable to allow larger diameter holes in the asphalt, and/or allow a threaded top on pin for a double nut and washer as an alternative to the welded top plate.
On another matter, have you run a TL-2 crash test or simulation test on the MwRSF TCB? We would be interested to know the approximate deflection distance for a TL-2 freestanding installation for designer information.
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