File:Biennial report of the Board of State Harbor Commissioners for (1875) (14783920073).jpg

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Identifier: biennialreportof1875cali_0 (find matches)
Title: Biennial report of the Board of State Harbor Commissioners for ..
Year: 1865 (1860s)
Authors: California. Board of State Harbor Commissioners for San Francisco Harbor
Subjects: California. Board of State Harbor Commissioners for San Francisco Harbor Harbors Waterfronts Shipping
Publisher: San Francisco : Winterburn & Co
Contributing Library: San Francisco Public Library
Digitizing Sponsor: California State Library Califa/LSTA Grant

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at gavethe best results is not satisfactory timber for piles exposed to theravages of the teredo. Mr. J. Marchbanks, Engineer of the Board of Harbor Commissionersof Wellington, New Zealand, says: Our experience is rather limited, owing to the practice of sheathing all piles withmuntz-metal. Ironbark (Eucalyptus paniculata) does not resist the teredo suc-cessfully, and. as an instance, a wharf constructed of these piles was built atOpunaki, New Plymouth, and after three years the whole of the piles were totallydestroyed. Jarrah (EucalyptuH mnrgitHita) resists the teredo much better thanironbark, and our only experience of these piles, unsheathed, was in this harbor,near the Patent Slip, where one was destroyed after being in position for thirtyyears. Mr. H. Cullen, Engineer for Harbors and Rivers, Brisbane, Queens-land, says: For wharf construction timber has been chiefly used, with, in several instances,cast iron piles, wrought iron bracing and wooden superstructures, but the ultimate
Text Appearing After Image:
REPORT OF BOARD OF STATE HARBOR COMMISSIONERS. 21 destruction of any underwater timber is so certain, and its protection so uncertain,that in the case of a large jettj- built last year I used reinforced concrete, and thelatter will probably be used generally in the future. Reverting to the actual timbers used, our practice has been to use gray ironbark(Eucalyptus sideraphlois) or spotted gum (Eucalyptus maculata), sheathed with22-ounce muntz-metal for all main piles, and during recent years, owing to theoccasional failure of the muntz-metal to maintain itself, I have also poisoned thetimber well before sheathing, using a solution of arsenic first, and then a solutionof copper, after which it is well coated with tar or bitumen. This treatment alonewill protect timber from marine worms for a few years, say two to six as limits,and insures the interim of safety of the pile should the metallic sheathing fall orreceive injury. For fender piles our practice is to use swamp mahogany or cypre

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https://www.flickr.com/photos/internetarchivebookimages/14783920073/

Author California. Board of State Harbor Commissioners for San Francisco Harbor
Permission
(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
1875
Flickr tags
InfoField
  • bookid:biennialreportof1875cali_0
  • bookyear:1865
  • bookdecade:1860
  • bookcentury:1800
  • bookauthor:California__Board_of_State_Harbor_Commissioners_for_San_Francisco_Harbor
  • booksubject:California__Board_of_State_Harbor_Commissioners_for_San_Francisco_Harbor
  • booksubject:Harbors
  • booksubject:Waterfronts
  • booksubject:Shipping
  • bookpublisher:San_Francisco___Winterburn___Co
  • bookcontributor:San_Francisco_Public_Library
  • booksponsor:California_State_Library_Califa_LSTA_Grant
  • bookleafnumber:907
  • bookcollection:americana
Flickr posted date
InfoField
28 July 2014


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