Rice Lake Combination System - Precision Loads On-Board Weighing Systems - Manual (Page 21)

Applications 17
• Optimum system performance is only achievable when the load cells are installed between the body (tank,
bin, flatbed, container, etc.) and the vehicle chassis, thus carrying the entire mass of the body and its payload.
Any structure, such as braces, rigid (non-flex) piping or tubing, pressure-retaining cylinders, and the like,
which can provide a load path between body and chassis that bypasses the load cells, will adversely affect
system performance.
4.2.1 Underbody Mounting Brackets
Note
Refer to Section 6.7 on page 65 for bracket sizing for other model load cells.
Body Bracket
Steel angle typically used is 6" x 4" x 1/2" thick. Minimum angle length for the PL9000-14.4 load cell is 16 inches
(406 mm). Never use an angle which is less than half an inch in thickness. For weaker body subframes, longer
angle lengths (for example, 35 inches (889 mm), see drawing below) add reinforcement to the runner. Body
subframe strength should determine the degree and type of reinforcing necessary. The installer must make these
determinations. The installer must ensure that body subframe remains strong and rigid, without sag between load
cell mounting points. See Section 4.2.3 on page 22.
Avoid 90 degree welds to the body subframe. Weld body brackets continuous for 6" every 12" of bracket on all
sides including underside. Alternate weld process on the top, bottom and side areas of the bracket to avoid
overheating and warpage. Plug welds on the 6" flange (mounted to the body subframe) are recommended.
Never weld to a load cell. If assembled body angles (with load cells) are used for alignment and positioning, clamp
assemblies in place, then remove load cells for final welding of the brackets.
Figure 4-9. Body Bracket
Contour, if required, and pick-up
cross members. Weld in place.
Figure 4-10. Extended Body Bracket for More Reinforcement