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I'm working on incorporating the transition from temporary barrier to permanent barriers. I've run across some questions (see attached) that I would like MwRSF to address.
|Date||September 15, 2010|
|Attachment||questions to MwRSF v1.pdf|
With respect to the Red Head drop in anchor, we would recommend that any drop-in anchor that has equal or greater ultimate shear and tensile capacity (as listed by the manufacturer) when compared to the tested anchor would be allowable. The ¾" bolts used would remain A325.
With respect to the Wedge Bolt anchor, we would recommend that any mechanical screw in type anchor that has equal or greater ultimate shear and tensile capacity (as listed by the manufacturer) when compared to the tested anchor would be allowable. We would want to use the same diameter anchors as tested in order to be consistent.
The trimmed blockout used in the design was fabricated from an existing thrie-beam timber blockout.
The missing dimension on the top of the cap should be 7.25".
If you need to go to a different height, there are several factors to consider. First, you want to keep the slope of the cap the same as the tested design. Second, you will want equal gusset spacing to the tested design. Third, increasing the height while maintaining the slope of the cap may require increasing the length significantly. Thus, we would recommend extending the sides of the cap down another 3" along the side of the barrier to allow for placement of intermediate anchors that attach the side of the cap to the side of the barrier. The anchors can be the same 5/8" mechanical anchors used elsewhere for the cap. We would recommend having these intermediate anchors approximately every 50" along the barrier. These additional anchors will prevent the cap from disengaging from the temporary barrier and allowing snag on the permanent barrier as the length of the cap increases.
|Date||September 17, 2010|
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