(Download) "Scientific American Supplement, No. 312, December 24, 1881" by Various Authors * Book PDF Kindle ePub Free
eBook details
- Title: Scientific American Supplement, No. 312, December 24, 1881
- Author : Various Authors
- Release Date : January 01, 2012
- Genre: Antiques & Collectibles,Books,Lifestyle & Home,
- Pages : * pages
- Size : 834 KB
Description
The machine illustrated on first page has been constructed for Port Alfred Harbor, this being one of several harbors now being made by Sir J. Coode in South Africa. The pier for the construction of which the crane will be employed will consist of concrete blocks laid on what is known as the "overend system". The blocks, being brought on trucks direct from the block yard to within the sweep of the machine, are raised by it, swung round, and accurately set, the machine being continually traveled forward as the work advances. The bottom blocks are laid on bags of concrete previously deposited by the crane out of boxes with flap bottoms.
 "Scientific American Supplement, No. 312, December 24, 1881" by Various Authors * Book PDF Kindle ePub Free){kind=link}
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