Metalwork Grid for the Cushman Floor

The dimensions are listed below left and are due to the design of a type of welded
queen excluder grid that is manufactured by
B.J. Engineering. Who should be contacted if you wish to purchase the metalwork.

Tolerances
Tie rod length
+0.5 mm -0.00 mm
Folded section length
+0.5 mm -0.00 mm
Providing that the width of the set of folded sections is
417 mm +1.00 mm -0.00 mm
the tolerance for the individual 3 mm gaps is
+0.2 mm -0.3 mm.

However, tolerances must not accrue in a cumulative manner. I have assumed that the jig will incorporate pegs or spacer strips to give consistency. Also any increase on 417 mm for the pack width must be subtracted equally from the 12 mm protrusion of the tie rods.
The 20 mm height can have a tolerance of
+0.5 mm -0.5 mm
and the 16.1 mm section width will vary due to tolerances on the gaps between the strips however the pitch should be maintained at 19.1 mm
+0.3 mm -0.2 mm

The spot weld tabs are shown in the small sketch at right and are 1.5 mm long.