Grid Truing Check

Grid Truing Check
Overview
The process for checking to see if grids are true at the beginning of each quarter.

Definitions:
 
Procedure:

1. At the beginning of each quarter, run a 6-foot test piece of grid material off each intergrid machine.
2. Cut the 6-foot test piece in half, creating two 3-foot pieces.
3. Butt the two test pieces of grid material together.
4. Check for any gaps at the center or ends of the two scrap pieces.
5. Flip one of the test grid pieces and butt them together again.
6. Check for any gaps at the center or ends of the two scrap pieces.
7. If a gap greater than 1/16” is created when the two pieces are butted together, tag the machine out and call over your team lead.
   1. The bow tolerance for grids is 1/16” per 3'.
8. If a gap greater than 1/16” is not created when the two pieces are butted together, the machine is within tolerance.
9. Fill out the Grid Truing Check sign off sheet appropriately.