Rice Lake Z6 Single-Ended Beam, SS Welded-seal, IP67, OIML C3 - Manual (Page 48)

44 Load Cell and Weigh Module Handbook
20.5 Safety Check Rods
Safety check rods are similar to stay rods in that they may be
applied to a vessel in similar fashion as stay rods. However,
they are fitted loosely to the vessel and may also be applied in
a vertical direction.
Safety check rods are left loose so that under normal
operation they do not apply any axial forces to the weigh
vessel. They are not an active part of the weigh system. The
safety check rods shown do add to the tare weight of the
vessel, but this is constant and does not affect the weighing
accuracy. Safety check rods are, as the name implies, a safety
feature intended to restrain the vessel if and when it is
subjected to large external or internal forces or if there is a
mechanical failure in the vessel’s normal support mechanism.
Horizontal safety check rods should be used to:
• Ensure the stability of tall slender vessels or vessels
with heavy eccentrically mounted equipment.
• Ensure the stability of vessels against wind or
seismic forces or threat from vehicular traffic.
As shown in Figure 20-7 (a), to be most effective, safety check
rods must be fitted at or above the filled vessel’s center of
gravity. Note that stay rods will perform all these functions and
more; however, safety check rods are less critical to system
operation and therefore do not require the same attention to
detail for successful installation.
Vertical safety check rods should be used:
• On all vessels mounted in tension where failure of the
normal suspension means would allow the vessel to
fall and cause injury or damage, see Figure 20-7 (b).
• In place of horizontal check rods when it is not
practical to use these to ensure the stability of tall
slender vessels or those subjected to wind or
seismic forces, see Figure 20-7 (c).
Vertical safety rods must be installed in an oversized hole in
the lower bracket so that they do not interfere in any way with
the vertical movement of the vessel.
For more information, see Section 21.0 on page 45
Figure 20-7.
(a)
(b)
(c)