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The beam of a ship is its width at the widest point as measured at the ship's nominal waterline.The beam is a bearing projected at right-angles from the fore and aft line, outwards from the widest part of ship. Beam may also be used to define the maximum width of a ship's hull, or maximum width including superstructure overhangs.


A narrowboat or narrow boat is a boat of a distinctive design, made to fit the narrow canals of the United Kingdom.. A narrowboat must be under 7 feet (2.13 m) wide (most modern boats are usually produced to a maximum of 6 feet 10 inches (2.08 m) wide). Their maximum length is 72 feet (21.95 m).


Thus, if you have a boat that is 50 feet on deck and 46 feet on waterline, the registered length will be 48 feet. The same holds true for the beam of the boat; it's an average between the widest point and the beam at water line. Tonnage


Beam is important in determining the handling characteristics of a ship design. A narrow beam hull will run fast but will not perform well in heavy waves because of the narrow cross section. A hull which has a wider beam will be less efficient in cutting through the water because of the larger mass of water that is being displaced.


Beams are Hot Dipped Galvanized. Cradle must be 1 ft. longer (minimum) than width of boat: Boat slip needs to be a minimum of 1 ft. wider than length of cradle. Example: Boat 8' wide, minimum cradle 9' & boat slip 10ft. wide. FREE SHIPPING ON THIS ITEM


The widest part of a boat's width is its beam. Measuring the beam is a two-step process, because you must find your boat's centerline and make the measurement perpendicular to the centerline. All you need is a ball of twine, a carpenter's square, some duct tape and a measuring tape.


What Is a Beam Measurement in Boats? The beam of a boat is the measurement of its width at its widest point. Many ship designs have a constant beam measurement that runs most of the length of the vessel, while others may have a more pronounced taper.


Re: Beam Width? How tight can I squeeze? I think you will be fine with 8' 6". Most boats have rub rails that let you bump against stuff without damaging the boat. You should closely inspect the slip to ensure that the only thing touching will be the rub rails though.


It really depends on the boat being designed: Typical values[edit]Typical length-to-beam ratios for small sailboats are from 2:1 (dinghies to trailerable sailboats around 20 ft or 6 m) to 5:1 (racing sailboats over 30 ft or 10 m).


As the weight, length and beam (width) of a given boat increase, so does the muscle power needed to launch and retrieve it. A small boat may be easy for one person to handle at the ramp, but larger boats (generally those more than 25 feet) may require additional hands.