S-2.1, r. 15 - Regulation respecting safety and health in foundry works

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39. Any cupola furnace shall have at least one safety opening that consists of a tube located 40 mm to 50 mm lower than the level of the tuyeres. This tube shall have a meltable plate which will melt if the molten metal reaches a limit level.
R.R.Q., 1981, c. S-2.1, r. 20, s. 39.