The span load of the grating is dependent on your desired load.
Load: ULD = Uniformly Distributed Load (KM/M2)
Load: C = Maximum concentrated/centre line load (KG/M)
If separated: Reduce loads by 10% and maximum span per load by +- 3.5%
Galvanising increases mass by +-9% per M2
All figures in table to be taken as approximate values.