Excavator rescues horse that stepped into a grate - GIF

[Gadgeteer]

Whoever made that cattle guard placed the pipes too far apart

Is there a standard distance of separation?

[Frank S]

Is there a standard distance of separation?

There is and again there isn't, if there is to be a pit under the guard then the rails need to be less than 3 inches, or more than 4" and no pit. The rails must be low enough to the ground to allow the animals foot to reach the ground without injury and be able to extract it on its own.