Grating must be installed with cross rods on top side to achieve strength specifications provided.
Metal should be used for all grating supports.
A minimum of 1” bearing shall be provided for bearing bar depths up to 2-1/4”;
2” minimum bearing shall be provided for bearing bar depths of 2-1/2” or greater.
Clearances shown are recommended, but may vary in accordance with dimensional tolerances
Cutouts for circular obstructions are recommended to be at least 2 inches larger in diameter than the obstruction.
It is further recommended that cutouts for all piping 4 inches or less in diameter be made in the field.
Heavy Duty Grating must be designed to have structural support under each bearing bar at cutouts.