53. Mass of the crucible: When the combined mass of the crucible, its contents of molten metal and handle exceeds 25 kg, the crucible shall be lifted from the furnace by not less than 2 workmen or by mechanical means. When the combined weight exceeds 80 kg, a lifting apparatus shall be used.
R.R.Q., 1981, c. S-2.1, r. 20, s. 53.