MODERN STEAM PRACTICE . 820 casting bolted to the gunwale ; and in some vessels having the frames worked above the deck Stringer , the timber heads or bollards are of wood bolted to the angle - iron frames . … hoop at the top securing the top plate , the Fig . 584 . — Bollard Head . whole being rivetted to the sheer strake and a , Bollard head . B , Stringer plate . stringer . Cat heads . — Cat heads for passing the anchor ropes are in some iron sailing vessels made of wood ; but in iron steam ships they…
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