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Title:

The Relationship between Torque, Tension, and Nut Rotation of Large Diameter Anchor Bolts
Cover of The Relationship between Torque, Tension, and Nut Rotation of Large Diameter Anchor Bolts

Accession Number:

01115773

Record Type:

Monograph

Availability:

Michigan Department of Transportation


Construction and Technology Division, P.O. Box 30049
Lansing, MI 48909 USA

Abstract:

The purpose of this investigation was to determine the relationship between torque, tension and nut rotation of the large-diameter anchor bolts used on cantilever sign supports. This research was in response to concerns about loose nuts found o these anchor bolts during field inspection of in-service sign supports, along with concerns regarding an unspecified tightening procedure. Results of this investigation were used to determine the appropriate anchor-bolt tightening procedure and to determine whether or not turning the nut past the snug position imparts the desired amount of tension in the anchor bolt. This investigation also determined the appropriate torque for checking anchor-bolt installations in the field, the effects of bolt relaxation, and any problems of thread stripping from tightening.

Report Numbers:

Research Report R-1330

Contract Numbers:

Research Project 91 TI-1556

Language:

English

Corporate Authors:

Michigan Department of Transportation


Construction and Technology Division, P.O. Box 30049
Lansing, MI 48909 USA

Michigan Transportation Commission

P.O. Box 30050
Lansing, MI 48909 USA

Authors:

Till, Roger D

Michigan Department of Transportation

Lefke, Nadege A

Michigan Department of Transportation

Pagination:

17p

Publication Date:

1994-10

Media Type:

Web

Features:

Figures (11) ; Tables (7)

Geographic Terms:

Michigan

Subject Areas:

Highways; Maintenance and Preservation; I60: Maintenance

Files:

TRIS

Last Modified:

May 12 2009 1:04AM