Serviceability of Douglas-fir marine piles and control of their deterioration Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/bg257k16t

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • In an exploratory survey of the serviceability of wood in the marine environment in the Pacific Northwest, pressure-creosoted piling with tops protected from wetting by the superstructure provided 40 and more years of service and showed little or no indication of deterioration. The service life of these piling is still to, be realized. However, wind driven rain, deck leaks, drainage, and improper construction practices can lead to deterioration of these piles. Fender, marina, bulkhead, and other piles with tops exposed to rain wetting are far more difficult to protect and can contain decay fungi within 1 year and advanced internal decay within 4 years. Brush-coating exposed pile tops with creosote or pentachlorophenol may delay decay by as little as 1 year. Solid crystals of ammonium bifluoride and a paste of fluor-chrome- arsenic-phenol have prevented decay in 89 and 100% of simulated cutoff Douglas-fir pile tops after 3 years. Internal decay of pressure-creosoted Douglas-fir piles has been stopped within the 1st year after treatment with volatile fungicides. Fungitoxic vapors of Vorlex (methylisothiocyanate and dichloropropenes) and chloropicrin (trichloronitromethane) but not Vapam (sodium N-methyldithiocarbamate) remain within these piles 5 years following treatment. Fungitoxic vapors of methyiisothiocyanate (active ingredient in Vorlex) moved 1.2 meters upward from the treating site within piles in 1 year. Internal decay in untreated Douglas-fir piles can be controlled by the use of fumigants but external and top decay are more difficult to control with fumigants alone. Vorlex or chloropicrin prevented shipworm attack of untreated Douglas-fir panels at Newport, Oregon. Vorlex slowed Limnoria attack in San Francisco Bay and Los Angeles Harbor but prevented such attack at Newport. Vapam was ineffective.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 256 Grayscale, 24-bit Color) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2010-07-14T16:36:16Z (GMT) No. of bitstreams: 1 HelsingGuyGustav1981.pdf: 6465681 bytes, checksum: 13da4d00de0142c3cc86d3b91d4dc5c4 (MD5)
  • description.provenance : Made available in DSpace on 2010-07-14T16:36:17Z (GMT). No. of bitstreams: 1 HelsingGuyGustav1981.pdf: 6465681 bytes, checksum: 13da4d00de0142c3cc86d3b91d4dc5c4 (MD5)
  • description.provenance : Submitted by Nitin Mohan (mohanni@onid.orst.edu) on 2010-07-01T22:16:27Z No. of bitstreams: 1 HelsingGuyGustav1981.pdf: 6465681 bytes, checksum: 13da4d00de0142c3cc86d3b91d4dc5c4 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2010-07-14T16:30:56Z (GMT) No. of bitstreams: 1 HelsingGuyGustav1981.pdf: 6465681 bytes, checksum: 13da4d00de0142c3cc86d3b91d4dc5c4 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items