Equipment for Rational Securing of Cargo on Railway ... - Vinnova

MariTerm AB 2004-01-30 jvgRASLA
6.4 Doors
6.4.1 UIC
Covered wagons
Sliding doors must be able to withstand:
- a transverse <strong>for</strong>ce <strong>of</strong> 8 kN (800 kg) due to pressure from the load acting in the centre
<strong>of</strong> the door over a square <strong>of</strong> 1 m side.
- a transverse <strong>for</strong>ce <strong>of</strong> 5 kN (500 kg) on each support point <strong>of</strong> the door.
No damage or residual de<strong>for</strong>mation is acceptable.
An approximated calculation to give the maximum <strong>for</strong>ce that can be supported by the door <strong>of</strong>
a typical wagon (Gbs 611) is shown below. The calculations do not take any benefits from
other possible distributions <strong>of</strong> the <strong>for</strong>ce into consideration.
Input data
Payload (P):
26 ton
Usable loading length (L): 12.7 m
Door width (W):
2.5 m
Test <strong>for</strong>ce (F):
8 kN
g: 9.81 m/s 2
F
8
The <strong>for</strong>ce expressed in parts <strong>of</strong> the payload: =
= 0. 16
W
2.5
g × P × 9.81×
26×
L
12.7
The calculation gives thus a maximum allowable <strong>for</strong>ce on the wagon door <strong>of</strong> 0.16 times the
maximum payload <strong>of</strong> the wagon (in relation to the length <strong>of</strong> the door compared to the loading
length). As the test <strong>for</strong>ce is applied at half the height <strong>of</strong> the side the <strong>for</strong>ce can be considered to
be evenly distributed over the entire side, if the moment is calculated from the wagon floor.
Double-leaf doors must be able to withstand
- a transverse <strong>for</strong>ce <strong>of</strong> 8 kN (800 kg) due to pressure from the load acting in the centre
<strong>of</strong> each door leaf over a square <strong>of</strong> 1 m side.
- a transverse <strong>for</strong>ce <strong>of</strong> 5 kN (500 kg) on each articulated point <strong>of</strong> the door.
A residual de<strong>for</strong>mation <strong>of</strong> maximum 2 mm is acceptable <strong>of</strong> the door itself but no damage or
residual de<strong>for</strong>mation is acceptable in the locking, running or guide mechanisms.
High-sided open wagons
The side doors must withstand a <strong>for</strong>ce <strong>of</strong> 20 kN (2000 kg) applied at a height <strong>of</strong> 1 m above
floor level in the centre <strong>of</strong> the doorway.
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