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Coil Bolt Anchors for the F-shape Steel Strap Tie-Down

Question
State	MO
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.

System Performance Evaluation

System Types
Portable Barriers

Applications

System Features

Date January 19, 2007
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Attachment bolts.pdf

Response
Response (active)	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.

Response

Response
(active)

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
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