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

MariTerm AB 2004-01-30 jvgRASLA
7.2 Steel slabs
The securing <strong>of</strong> steel slabs is regulated by Chapter 1.6.9 in RIV Loading Guidelines, App II,
Section 2. The loading method prescribed in the guidelines permits the goods to slide in
longitudinal direction in the wagon. Since the slabs have a rough surface no maximum
allowed distance is needed sideways to the side stanchions due to risk <strong>for</strong> sliding.
This type <strong>of</strong> cargo is generally heavy and has to be distributed over an as wide area as
possible, creating intermediate spaces between the stacks. Since the steel slabs are allowed to
slide the centre <strong>of</strong> gravity <strong>of</strong> the cargo may shift, causing non allowed boogie pressure both
lengthways and sideways.
The height <strong>of</strong> the stacks is to be less than their width and no more than four tiers are allowed,
since there are a large permitted distance between side stanchions and slabs. The minimum
effective height <strong>of</strong> the stanchions is to be 10 cm.
The guidelines state that when the goods is secured by only two stanchions the slabs must
extend beyond them by at least 50 cm <strong>for</strong> hump and fly shunting and 30 cm <strong>for</strong> none hump
and fly shunting.
If the wagons have strong end walls no required minimum clearance lengthways would be
needed. A system <strong>for</strong> adjustable transverse blocking would allow higher stacks with more
tiers (depending on blocking height). A continuous side blocking will exclude the demand <strong>of</strong>
two pair <strong>of</strong> stanchions always securing the slabs. It is important to know the strength <strong>of</strong> the
blocking.
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