Directive of the European Parliament and of the Council of 12 December 2006 laying down technical requirements for inland waterway vessels and repealing Council Directive 82/714/EEC (2006/87/EC) (repealed)

Article 22.02 Limit conditions and method of calculation for confirmation of stability for the transport of non-secured containers

1. All methods of calculating vessel stability in the case of non-secured containers shall meet the following limit conditions:

(a) Metacentric height shall be not less than 1,00 m.

(b) Under the joint action of the centrifugal force resulting from the vessel's turning, wind pressure and the free surfaces of liquids the heeling angle shall not exceed 5° and the edge of the deck shall not be immersed.

(c) The heeling lever resulting from the centrifugal force caused by the vessel's turning shall be determined in accordance with the following formula:

where:

c_KZ

parameter (c_KZ = 0,04) (s²/m);

v

the maximum speed of the vessel in relation to the water (m/s);

height of centre of gravity of the laden vessel above its base (m);

T'

draught of the laden vessel (m).

(d) The heeling lever resulting from the wind pressure shall be determined in accordance with the following formula:

where:

c_KW

parameter (c_KW = 0,025) (t/m²);

A'

lateral plane above the respective plane of draught with the vessel laden (m²);

D'

displacement of the laden vessel (t);

l_W

height of the centre of gravity of the lateral plane A' above the respective plane of draught (m);

T '

draught of the laden vessel (m).

(e) The heeling lever resulting from the free surfaces of rainwater and residual water within the hold or the double bottom shall be determined in accordance with the following formula:

where:

c_KfO

parameter (c_KfO = 0,015) (t/m²)

b

width of hold or section of the hold in question (m);(1)

l

length of hold or section of the hold in question (m);(1)

D'

displacement of the laden vessel (t).

(f) Half of the fuel and fresh water supply shall be taken into account for each load condition.

2. The stability of a vessel carrying non-secured containers shall be considered to be sufficient if the effective does not exceed the _zul resulting from the following formulae. The _zul shall be calculated for various displacements covering the entire range of draughts.

(a)

No value less than 11,5 (11,5 = 1/tan5°) shall be taken for .

(b) _zul = - 1,00 (m)

The lowest value of _zul in accordance with formula (a) or (b) shall be decisive.

Within the formulae:

_zul

maximum permissible height of the laden vessel's centre of gravity above its base (m);

height of the metacentre above the base (m) in accordance with the approximation formula in paragraph 3;

F

respective effective freeboard at 1/2 L (m);

Z

parameter for the centrifugal force resulting from turning

v

maximum speed of the vessel in relation to the water (m/s);

T_m

respective average draught (m);

h_KW

heeling lever resulting from lateral wind pressure according to paragraph 1(d) (m);

h_KfO

sum of the heeling levers resulting from the free surfaces of liquids according to paragraph 1(e) (m).

3. Approximation formula for

Where no sheet of hydrostatic curves is available the value for the calculation in accordance withparagraph 2 and Article 22.03 (2), may be determined by the following approximation formulae:

(a) for vessels in the shape of a pontoon

(b) for other vessels

(1)

The hold sections providing free surfaces that are exposed to water arise from the longitudinal and/or tranverse water-tight compartmentalisation that forms independent sections.