ductile iron slotted grate - E coated black - 5" wide x 24" long x 0.75" thick  - rated for DIN load class F.
 
This is a very heavy duty 5" wide slotted trench drain grate.  It is typically used on a 4" wide prefabricated trench drain or 4" wide catch basin.  This grate is rarely required except in the heaviest port duty applications.  Use this grate if you are have or are designing an industrial or port facility where very large forklifts will be crossing the trench drain.  Be sure to select an appropriate frame for this loading.