File:Cassier's magazine (1911) (14577661197).jpg

Identifier: cassiersmagaz401911newy (find matches)
Title: Cassier's magazine
Year: 1891 (1890s)
Authors:
Subjects: Engineering
Publisher: New York Cassier Magazine Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
sets ofgirders, and is distributed to the endsupports in proportion to the stiffnessof each girder; and, just as the sideof an oil vessel can easily be shownto be considerably stronger than thatof an ordinary cargo steamer, in thesame way and for the same reasonthe bottom also is very much strongerthan the bottom of an ordinary cargovessel. Although, as has been said, thestructure has been developed alongexperimental lines, it is difficult, solong as we confine ourselves to trans-verse framing, to conceive an alter-native to, or to define any funda-mental departure from, arrangementswhich are so obviously suggested bythe conditions to be fulfilled. Thistype of structure is the one approvedby Lloyds Register of Shippingafter very careful consideration, andis embodied in their rules. It hasbeen adopted in all kinds of vessels,from the largest to the smallest, and,considering the work to be done,with surprisingly good results. While it is true that the system of OIL-CARRYING VESSELS 743
Text Appearing After Image:
CJ&^Tge lig 6h%*^j ^___ -PLAN SHOWING BULKHEAD STIFFENING construction briefly discussed in theforegoing has not sensibly changedduring recent years, there has beenconstant change proceeding in thatimportant part of the design whichmay be described as structural detail.Experience has shown the absoluteimportance of attending to mattersof this kind in oil vessels. It is ofvital importance, for example, thatthe riveting of oil vessels should beattended to with the greatest care,and adequately to deal with this partof the subject alone one would re-quire more space than is availablein an article of this kind. The im-portance of sound riveting may begauged when it is realized that astudy of the structural damage foundin oil ships shows that a considerableproportion of it consists of loose,started and fractured rivets, espe-cially where the keelsons and string- ers cross the transverse bulkheads,rather than of fractured material.When the rules of Lloyds Registerfor vessels intended to

Note About Images