POINT SPECIALIST DOORS & HATCHES

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Our doors are designed, developed and manufactured in accordance with international maritime rules and regulations. Our company is audited by relevant organisations charged with the task of ensuring compliance.

Our products are tested and scrutinised in a similar way. We are bound by various rules, codes and regulations applicable to the type of vessel our products will be protecting. Therefore, when contacting us for assistance, please don’t be offended if we ask some probing questions about your requirements.

Here is a short glossary of terms:

Clear opening: The X & Y dimensions in mm required in the walk through of the frame.

Structural opening: The X & Y dimensions in mm in the opening made in the wall or bulkhead, into which the door frame will be fitted.

Handing: The position of the hinges which determines which way the door will swing open. “Left Hand” (LH) means that the hinges are visible on the left when the door is shut. The door shown above is RH.

Coaming height: The height measured from deck or floor to the base of the structural opening.

Sill type: Some doors can have a different style of threshold over which you step. The sill can be changed to suit aesthetics and application in some circumstances.

Vision panel: A clear window square or rectangular in shape in a door – not watertight. Size and use varies depending on door type.

Port light: A clear round window which is weathertight, or watertight in some instances. A deadlight is fitted where the port light must be closed off while at sea.

Classification Society: All vessels are inspected by surveyors representing independent organisations responsible for ensuring that a vessel is safe to carry out its design function safely. There is a different one for each major country signed up to the international maritime regulations. We, as an equipment manufacturer, must comply with their rules and regulations in the same way as vessel builders, owners and operators.

Spray, Weather or Watertight: There is a difference, which is specified in the rules for the protection of vessels depending on the class of vessel. Every vessel should have a door list which identifies every door and the type. The type of door is dependent on the position in the vessel and the function of the door.

Hydrostatic test: To test the watertightness of a door. The purpose of a watertight door is to replace the function of a removed part of a watertight bulkhead and the door must prevent the passage of water in the same way as a steel plate would – but also allow people through the bulkhead when the door is opened. Every watertight door, or batch of doors, manufactured must be tested and witnessed by a classification society surveyor.

Hydrostatic head: The head of water that the door must resist in metres. The positions of watertight doors will vary in vertical distance above and below the waterline. The hydrostatic head is the maximum height of water that could act against a door in the worst case including collision damage situations.

Fire rating: For marine situations, fire is classed according to severity and length of time that an item of equipment or bulkhead must resist the fire and the passage of heat from the hot side to the cold. The rules are set out in SOLAS (Safety Of Life At Sea). An “A” class fire door must resist the passage of the fire for 60 minutes. An “A60” fire door must do this and also prevent an increase of 140°C of heat on the cold side for 60 minutes.