Be stable and of ample strength and rigidity for his or her purpose
Rest on stable and appropriately robust surfaces
Be of ample size to permit safe use for persons, plant and material
Have appropriate means that for preventing a fall
Have a surface that has no gap through that an individual or material may fall and cause injury
Be created, used and maintained to forestall the risks of slippery, tripping or a person being unfree between them and any adjacent structure