When the centre line of this test gauge has traversed a distance of 300 mm from its starting position and the test gauge is touching the surface of the step or floor, it shall be retained in that position.
Kui selle katsekeha kesktelge on nihutatud ristsuunas algasendist 300 mm võrra ja katsekeha puudutab trepi pinda, tuleb katsekeha jätta sellesse asendisse.