BS/EN 14504-2019 pdf download.Inland navigation vessels – Floating landing stages and floating bridges on inland waters – Requirements, tests.
4.3.2 Intact stability
At maximum draught level, a
— freeboard of at least 0,15 m,
— safety distance of at least 0,30 m. and
— heelingangleofnomorethan 100
shall be maintained.
In addition, the metacentric height for floating establishments under option A (see 4.4) under impacts as per A.5 to A.7 and All shall be at least 0.15 m. For these structures, heeling motions caused by the vessel’s movement or by the mooring equipment as well as open areas of liquid, which occur during the operation of the floating establishment, shall also be taken into consideration.
Intact stability shall be tested as specified in 7.3.1.
4.3.3 Damaged stability
It shall be ensured that the floating establishment will neither sink nor capsize in the case, that one air chamber is damaged. In this case, a residual freeboard and a residual safety distance each of not less than 10cm shall be maintained; if greater residual safety distances or residual freeboards are required by the specifics of the waterway, these shall be taken into account.
Free surfaces of liquids that can occur during operation shall also be taken into account.
If all buoyancy bodies are completely filled with a material according to 4.5.4, proof of leak stability may be omitted.
Damage stability shall be tested as specified in 7.3.2.
4.4 Anchorages for floating establishments
Floating establishments shall be anchored In their positions to prevent them from being torn loose or being displaced by currents, wind, waves, fluctuations in water level or the draught or wash of passing vessels or possible special loads. In the case of floating landing stages, the influence of berthing ships shall also be taken into consideration. The functioning capability of the anchoring of the floating establishment shall also be proven for the case that the floating body of the floating establishment springs a leak
Anchorage for the floating establishment shall comply with one of the following two options:
a) Option A: the floating establishment shall be secured to the land by means of:
4.5.1 General
The floating establishment shall be designed so that it can follow all changes in water level during operation.
4.5.2 Freeboard
Taking into account 4.3. for floating landing stages the height difference between the traffic areas of the floating body and the deck of the vessel shall be as small as possible for the berthing vessels expected.
For floating bridges the height of the traffic areas of the floating body shall be selected taking 4.3 into account, so that no waves enter the traffic areas under predictable wind and wave conditions.
4.5.3 Floating bodies
Floating bodies using option B (see 4.4) anchorages shall be fixed so that they cannot twist. The height of the guides or dolphins shall be sufficient dimensioned so that the floating body is not flooded at the maximum water level to be expected or the floating body shall be secured against floating away.
Floating bodies shall have one or more buoyancy bodies, which:
— comprise a total of at least three watertight air chambers, or
— are completely filled with a material according to 4.5.4.
It shall be possible to seal the openings in the air chambers so that they are waterproof.
4.5.4 MaterIals for filled buoyancy bodies
Materials used to fill the filled buoyancy body shall have closed pores.
The water absorption characteristics of the material shall be taken into consideration during proving.
For buoyancy elements made of expanded polystyrene according to EN 13163, water absorption characteristics according to EN 12087 of max. 5 % by volume are recommended.
These materials shall be resistant against external influences or protected against such influences.
5 Equipment
5.1 Railings, barrier
5.1.1 The walkways on floating landing stages shall be fitted with fixed railings as specified in EN 711 at points where it is possible to fall into the water or to lower-lying levels when a vessel is moored. The railings shall be of types PF or PG.BS/EN 14504-2019 pdf download.