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Flotation
Flotation Material Installation Requirements
a) Air Chambers
Air chambers shall maintain their integrity
under pre-test conditioning and under flotation test conditions.
They shall not leak when subjected to an internal air pressure
test and shall not allow the ingress of water when submerged
to at least a depth equal to that required in the flotation
test.
b) Plastic Foam Blocks and Other Shapes
1) A method of identifying foam blocks and
other shapes must be employed to assure that each boat gets
the correct amount of flotation in the correct location.
2) Expanded polystyrene foam must not come
in contact with uncured polyester resin or fumes.
3) Foam blocks and other shapes must be secured
so that no movement in any direction occurs that will effect
the flotation's performance.
4) Installation must be in a manner that will
prevent:
- damage from occupant contact
- deterioration from exposure to direct
sunlight
- damage from normal use of the boat.
5) The space provided for the installation
of foam blocks must be large enough to prevent the necessity
of using force that will deform the shape of the block during
the installation process. Deformation will lower the volume,
and therefore the total buoyancy, of the foam block.
c) Sprayed or Poured Liquid Mix
1) When liquid flotation material is installed
directly in place, constraints must be provided in the form
of bulkheads, boxes or dams to ensure the proper volume,
and to ensure that the centers of buoyancy are correctly
placed.
2) Clearance around, and passages through,
the foam should be provided for:
- routing controls, cables and wires;
- access to windshield fasteners, cleat
and chock fasteners, rail
fasteners, ventilation ducts, other deck hardware and
standard fittings;
- bilge drainage;
- drainage of the top of metallic fuel tanks
(See Fuel Systems Compliance
Guideline).
FIGURE
- 7.3
FIGURE
- 7.4
FIGURE
7.5 - Flotation Material — Protection from Damage
FIGURE
7.6 - Flotation Material — Protection from Damage
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