MODERN STEAM PRACTICE . 792 When vessels are designed for Services where the draught of water is limited , a hanging keel is sometimes dispensed with , and the centre keelson is carried down with two angle irons on its lower … long rivets , or by tapped rivets , and the difficulty of scarphing the keelson over the butt joint efficiently , are two very great objections to this plan when the forgings are of large size . In Figs . 562 A and 562 B are given the details of the connections
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