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|Description Text||Attached is the information regarding the bolts for the tie-down system on temporary concrete traffic barrier. APAC has requested to use coil bolts rather than the drop-in anchor system. A colleague said he spoke with you and asked that I send this to you for review.|
|Date||January 19, 2007|
We reviewed the anchor data from our testing and the Hilti published data. Our ¾-in. drop-in provided 18.9 k in tension and 25.6 k in shear. Any replacement anchor needs to provide equivalent capacity to be considered as an alternate. The Hilti coil anchor provides: 2.940 k tension allowable or 11.760 k tension ultimate (4X) and 5.540 k shear allowable and 22.160 k shear ultimate (4X). As such, we do not believe that this anchor option is acceptable in the absence of crash testing.
|Date||January 26, 2007|
130 Whittier Research Center
2200 Vine Street
Lincoln, NE 68583-0853
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