Freeman Marine Equipment, Inc.
888-FREEMAN  |  888-373-3626

Definitions

ABS GRADE - (fabricated hatches, doors, manholes, scuttles) - Products would be fabricated in accordance with specifications generally acceptable by the American Bureau of Shipping and most classification societies.  These specifications would include panel and frame of cover and coaming thickness, type and quality of materials and welding details.

BULKHEAD CUTOUT - Size of the rough opening in the bulkhead or deck, before coaming installation.  Items supplied by Freeman Marine would be dimensioned to fill this opening.

CLAMP GRIP - Window has two main components, a mainframe complete with glazing, and the inner trim ring.  Mainframe is installed from outside, the trim ring is installed from inside and screwed to the mainframe, trapping the bulkhead between the two frame components.

CLEAR OPENING - Actual dimension that you can pass or see through in a door, hatch, manhole, window, scuttle, or portlight.

CONCEALED DOGS - Dog components do not extend beyond the face of the door panel or frame.

CONCEALED HINGE - Hinge components do not extend beyond the face of the door panel or frame.

FLUSH DOORS - Special cast aluminum pockets are installed in the outer "skin" of the door panel.  A low profile door dog is installed in each pocket.  Dog does not protrude beyond the pocket.

KNIFE EDGE SEAL - A method of sealing a door or other closure, where a relatively thin edge of the metal frame seals by pressing into a gasket from the perpendicular.

LAMINATED GLASS - A plastic laminate is sandwiched between two or more panes of glass, and the unit is sealed under pressure and heat, forming a bond.  Not as strong as tempered glass, but if broken, the fragments normally adhere to the laminate material, staying in the window frame.

LEFT HAND OPENING - The term Freeman Marine uses to define a door that from the outside of the compartment swinging toward the operator has hinges on the left side.

MITERED CORNER - A door or door frame joint formed by fitting two pieces together beveled to form a corner.

PLATE GLASS - Float glass with polished parallel surfaces.  Glass has been annealed during the production process, but has not been tempered.  Will break into jagged pieces.

POLYCARBONATE - Synthetic compounds used for window glazing purposes.  Brand names include Lexan, Tuffak, Lucite and Plexiglas.


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RADIUS CORNER - A formed corner, such as would normally be specified on a door or window frame.  Typically much stronger than a mitered corner.

RAISED CENTER SPINDLE - Customizing the vertical shafts in Freeman cast aluminum hatches, so that the top of the shaft extends beyond the hatch cover.  This allows the cover to be surfaced with teak or some other covering, while still allowing access to the mechanism.

RIGHT HAND OPENING - The term Freeman Marine uses to define a door that from the outside of the compartment swinging toward the operator has hinges on the right side.

SPRING BALANCED - A method of making larger fabricated hatches and scuttles easier and safer to open.  A large spring is installed on the fabricated item and tensioned so that the weight of the cover is offset by the tension of the spring, reducing the effort required to open the cover.  A spring-balanced hatch is not intended to swing up when opened without operator assistance.

STANDARD GRADE - (fabricated hatches, doors, manholes, scuttles) - Products would be fabricated in accordance with specifications generally acceptable by the American Bureau of Shipping and most classification societies.  These specifications would include panel and frame of cover and coaming thickness, type and quality of materials and welding details.

T STYLE HANDLE - A removable Freeman deck hatch handle, that fits into the vertical shaft of the hatch mechanism.  Used mainly for additional security and limiting access, the handle is stored elsewhere on the vessel.

TEMPERED GLASS - Plate glass that has undergone a tempering process, making it significantly stronger and more impact-resistant.  If broken, tempered glass breaks into small pieces instead of jagged pieces.

WEATHERTIGHT - An industry definition of marine closures indicating that they could be exposed to the elements, with the probability that only small amounts of water, wind or rain would pass thru the closure.

WATERTIGHT - A closure designed and constructed in such a manner that no water can pass through.  There are different definitions of watertight, depending on the location in relation to the waterline of the vessel and the importance of the seal desired.

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