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Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Condition assessment of timber bridges. 1, Evaluation of a micro-drilling resistance tool

Source: Gen. Tech. Rep. FPL-GTR-159. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 8 p.

Author(s)Brashaw, Brian K.; Vatalaro, Robert J.; Wacker, James P.; Ross, Robert J.

Publication Year: 2005  View PDF »

Category: General Technical Reports

Abstract: The research presented in this report was conducted to evaluate the accuracy and reliability of a commercially available micro-drilling resistance device, the IML RESI F300-S (Instrument Mechanic Labor, Inc., Kennesaw, Georgia), in locating deteriorated areas in timber bridge members. The device records drilling resistance as a function of drilling depth, which allows the operator to assess the location of deterioration in the member cross section. Bridge components containing different levels of natural decay were used as test specimens in this study. The IML RESI F300-S was first used to assess decay in the timber bridge specimens. The specimens were then sawn along their length into slabs to expose their interior condition. The interior faces of these slabs were inspected visually and with a stress-wave probe to confirm if deterioration was present. On the basis of these tests, we conclude that this micro-drilling device accurately determines if deterioration is present at the point at which the test is performed.

Keywords: Timber, bridges, inspection, drilling resistance, nondestructive evaluation

File size: 1 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 20791
Current FPL Scientists associated with this product (listed alphabetically)
Ross, Robert J.
Supervisory Research Gen. Engineer
Wacker, James P.
Research General Engineer

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