BRIDGE REPAIR/REHABILITATION FEASIBILITY STUDY

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from overloads or other mechanical damage (Figure 14-21). When existing members are decayed, appropriate steps must be taken to eradicate the infection and prevent its spread to the new component. The decayed portions of the member should be removed and the remaining portions treated in place. Again, the source of moisture that provided the suitable decay conditions must also be eliminated. Figure 14-21. - A sister member in a glulam beam superstructure. The outside beam, which was damaged by a vehicle overload, could not be easily replaced. The sister member was added along the outside of the beam to restore the capacity to the structure. 14.7 SELECTED REFERENCES 1. American Association of State Highway and Transportation Officials. 1976. AASHTO manual for bridge maintenance. Washington, DC: American Association of State Highway and Transportation Officials. 251 p. 2. American Society of Civil Engineers. 1986. Evaluation and upgrading of wood structures: case studies. New York: American Society of Civil Engineers. 111 p. 3. American Society of Civil Engineers. 1982. Evaluation, maintenance, and upgrading of wood structures. Freas, A., ed. New York: American Society of Civil Engineers. 428 p. 4. Avent, R.R. 1985. Decay, weathering and epoxy repair of timber. Journal of the Structural Division, ASCE 111(2): 328-342. 5. Avent, R.R. 1986. Design criteria for epoxy repair of timber structures. Journal of Structural Engineering 112(2): 222-240. 14-28
6. Avent, R.R. 1985. Factors affecting strength of epoxy-repaired timber. Journal of the Structural Division, ASCE 112(2): 207-221. 7. Avent, R.R. 1986. Repair of timber bridge piling by posting and epoxy grouting. In: Trans. Res. Rec. 1053. Washington, DC: National Academy of Sciences, National Research Council, Transportation Research Board: 70-79. 8. Avent, R.R.; Emkin, L.Z.; Howard, R.H.; Chapman, C.L. 1976. Epoxy-repaired bolted timber connections. Journal of the Structural Division, ASCE 102(4): 821-838. 9. Avent, R.R.; Emkin, L.Z.; Sanders, P.H. 1978. Behavior of epoxyrepaired full-scale timber trusses. Journal of the Structural Division, ASCE 104(6): 933-951. 10. Avent, R.R.; Sanders, P.H.; Chapman, C.L. 1982. Space-age adhesives. The Military Engineer 74(477): 20-22. 11. Avent, R.R.; Sanders, P.H.; Emkin, L.Z. 1978. Epoxy repair of timber structures comes of age. Construction [Adhesive Engineering Co.] 13(2): 6. 12. Avent, R.R.; Sanders, P.H.; Emkin, L.Z. 1979. Structural repair of heavy timber with epoxy. Forest Products Journal 29(3): 15-18. 13. Avent, R.R; Issa, R.R.A.; Baylot, J.T. 1982. Weathering effects of epoxy-repaired timber structures. In: Structural Uses of wood in adverse environments. New York: Van Nostrand Reinhold Co.: 208-218. 14. Better Roads. 1980. Bridge pilings can be protected; FPR jackets stop deterioration. Better Roads May: 20-25. 15. Better Roads. 1973. For these timber piles, life begins at 58 years. Railway Track and Structures September: 27-29. 16. Better Roads. 1980. Gribbles’ attack collapses bridge...but polyester sleeves thwart them. Better Roads April: 10-14. 17. Clark, J.W.; Eslyn, W.E. 1977. Decay in wood bridges: inspection and preventive & remedial maintenance. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 51 p. 18. Csagoly, P.F.; Taylor, R.J. 1979. A development program for wood highway bridges. 79-SRR-7. Downsview, ON, Can.: Ministry of Transportation and Communications. 57 p. 19. Eslyn, W.E.; Highley, T.L. 1985. Efficacy of various fumigants in the eradication of decay fungi implanted in Douglas-fir timbers. Phytopathology 75(5): 588-592. 20. Gerke, R.C. 1969. New process restores timber piles. Ocean Industry May: 92-93. 21. Heising, G.D. 1979. Controlling wood deterioration in waterfront structures. Sea Technology 20(6): 20-21. 22. Highley, T.L. 1980. In-place treatment for control of decay in waterfront structures. Forest Products Journal 30(9): 49-50. 23. Highley, T.L.; Eslyn, W.E. 1982. Using fumigants to control interior decay in waterfront timbers. Forest Products Journal 32(2): 32-34. 14-29
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BRIDGE REPAIR/REHABILITATION FEASIB
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1.0 EXECUTIVE SUMMARY The existing
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such there is a risk that the proje
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3.0 BRIDGE DESCRIPTION Bridge Numbe
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Photo 2 - Present Mitchell River Br
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4.0 ELEMENT CONDITION & REHABILITAT
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Based on the 1997 load rating analy
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promotes growth in the number and s
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4.2.2 Deck NBIS Condition Rating: 5
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Rehabilitation Scope: In order to m
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4.2.5 Railings NBIS Condition Ratin
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Functionality and Safety: Eliminati
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Although in-place preservative trea
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The bascule span timber stringers c
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Repair Scope: Although the timber m
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Use of an all steel counterweight w
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additional force effects, the speci
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typically loose. The steel guardrai
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Functionality and Safety: The cap b
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The surface decay and deterioration
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the interior of the piles where the
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Load Capacity: The current loss in
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Visual Impacts: Replacement of the
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Condition Description: There are cu
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5.0 OTHER CONSIDERATIONS 5.1 Naviga
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SUMMARY OF TIMBER ELEMENT SERVICE L
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5.3 Funding The project is currentl
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navigation opening. The estimated c
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• Continued replacement, repair a
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APPENDICES A. Existing Bridge Plans
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APPENDIX B Structures Field Inspect
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PAGE 3 OF 22 CITY/TOWN B.I.N. BR. D
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CITY/TOWN B.I.N. BR. DEPT. NO. 8.-S
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PAGE 2 OF 7 CITY/TOWN B.I.N. BR. DE
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APPENDIX C Load Rating Summary (199
Page 237 and 238: MAINTENANCE AND REHABILITATION OF T
Page 239 and 240: Figure 14-1. - Many covered bridges
Page 241 and 242: (discussed later in this chapter),
Page 243 and 244: Figure 14-5. - Liquid wood preserva
Page 245 and 246: wood, and other openings to the atm
Page 247 and 248: Table 14-1. - Number and size of ho
Page 249 and 250: member noting treatment information
Page 251 and 252: Figure 14-11. - Splicing and scabbi
Page 253 and 254: STRESS LAMINATING Stress laminating
Page 255 and 256: ond between separated sections, inc
Page 257 and 258: onding the old and new pile section
Page 259 and 260: GENERAL PROCEDURES FOR EPOXY REPAIR
Page 261 and 262: openings will allow epoxy to escape
Page 263: Another quality control problem is
Page 267 and 268: Integrated Remedial Protection of W
Page 269 and 270: Figure l-Effect of fumigant applica
Page 271 and 272: Table 1- Residual MITC content in D
Page 273 and 274: of reinvasion (Forsyth and Morrell,
Page 275 and 276: might represent the best option, wh
Page 277 and 278: In: Ritter, M.A.; Duwadi, S.R.; Lee
Page 279 and 280: Present and Potential Commercial Ti
Page 281 and 282: 2 U.S. DEPT. OF AGRICULTURE HANDBOO
Page 289 and 290: 10 U.S. DEPT. OF AGRICULTURE HANDBO
Page 305 and 306: APPENDIX F FRP Pile Jackets
Page 307 and 308: about its hazard to human health. T
Page 309 and 310: Fig. 5. Cross section of wood pile
Page 311 and 312: (Lopez-Anido et al. 2004c). For exa
Page 313 and 314: Table 1. Cost Items for FRP Composi
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Hardcore Composites. (2000). Hardsh
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CALCULATION COVER SHEET Project Nam
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URS Corp. 260 Franklin Street Bosto
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APPENDIX I Correspondence
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