#Margin plate ship construction full#

It is a solid plate attached to supporting plates it must be thicker than the adjoining plates This type of keel is prefer in modern time and is used by all sea going vessels Flat KeelДЇlat keel is used in single bottom ships. Steel plates on either side of the bar keel are known as gar-board strake. It is mostly used for Ferries, tugs, and boats where they are more exposed to grounding risk.ДЄ bar made up of steel is placed in the centre of the keel called bar keel.Д«ar keel is stronger and heavier than the flat keel. Ship in Dry Dock Sitting on BlocksДЇirst type of keel which is used since the first iron type of ship is built Keel is also called as back bone of a ship as it is the main part of the ship Keel is the bottom most plate of a ship and usually very thick in size as whole ship structure sits on this plate, also refers as center-line, the construction of ship starts from here.

Some of the terms used in Keel Construction.

Why Duct keel has advantage over other types of keel.

It is commonly employed in carvel and iron/steel shipbuilding, but very few clinker craft use them. ДЄ 'stealer' is a short strake employed to reduce the width of plank required where the girth of the hull increases or to accommodate a tuck in the shape. Inflatable dinghies and RIBs usually have a rubbing strake (typically a glued-on rubber extrusion) at the edge. Many current pleasure craft reflect this history in that they have a mechanically attached (and therefore replaceable) rub rail at the location formerly occupied by a rubbing strake, often doubling to cover the joint between a GRP hull and its innerliner.

In clinker boats, the rubbing strake was applied to the outside of the sheer strake. It was much less broad but thicker than other strakes so that it projected and took any rubbing against piers or other boats when the boat was in use. ДЄ rubbing strake was traditionally built in just below a carvel sheer strake. Strakes are joined to the stem by their hood ends. The uppermost along the topsides is called the sheer strake. Working upward come the bottom strakes, lowers, bilge strakes, topside strakes, and uppers also named sequentially as the D strake, E strake, etc. The next two are the first broad or B strake and second broad or C strake.

In boat and ship construction, strakes immediately adjacent to either side of the keel are known as the garboard strakes or A strakes.

#Margin plate ship construction full#

In modern welded construction, the plates are normally butt-welded with full penetration welds all round to adjoining plates within the strake and to adjoining strakes. In a riveted steel ship, the strakes were usually lapped and joggled (one strake given projections to match indentions in the one adjoining), but where a smoother finish was sought they might be riveted on a butt strap, though this was weaker. Where the transverse sections of the vessel's shape are fuller, the strakes are wider they taper toward the ends. In larger wooden vessels strakes typically comprise several planks which are either scarfed, or butt-jointed and reinforced with a butt block. In small boats strakes may be single continuous pieces of wood. In a metal ship, a strake is a course of plating. The word derives from traditional wooden boat building methods, used in both carvel and clinker construction. The garboard strakes are the two immediately adjacent to the keel on each side. On a vessel's hull, a strake is a longitudinal course of planking or plating which runs from the boat's stempost (at the bows) to the sternpost or transom (at the rear). Diagram of typical modern metal-hulled shipвЂ™s exterior plating, with a single strake highlighted in red