197(1)Before a sheave is used, an employer shall obtain a certificate for the sheave from the manufacturer of the sheave or from an engineer certifying as to
(a)
the maximum rated load,
(b)
the diameter of rope for which it was designed,
(c)
the breaking strength of the rope for which it was designed, and
(d)
the maximum amount of groove wear that is permitted.
197(2)An employer shall ensure that
(a)
no sheave is loaded above the maximum rated load, as stated in a certificate obtained under subsection (1),
(b)
the diameter of the rope used for the sheave is the diameter for which the sheave was designed, as stated in the certificate obtained under subsection (1),
(c)
the rope used on the sheave meets or exceeds the breaking strength of the rope for which the sheave was designed, as stated in the certificate obtained under subsection (1), and
(d)
the maximum amount of groove wear that is permitted, as stated in the certificate obtained under subsection (1), is not exceeded.
197(3)Subject to subsection (4), an employer shall ensure that the sheave diameter to rope diameter ratio for a drum hoist is equal to or greater than
(a)
60 to 1, where the nominal rope diameter is 25.4 mm or less, and
(b)
80 to 1, where the nominal rope diameter is greater than 25.4 mm.
197(4)An employer shall ensure that the sheave diameter to drum diameter ratio for a drum hoist in use for shaft sinking or for preliminary development work during shaft sinking is equal to or greater than
(a)
48 to 1, where the nominal rope diameter is 25.4 mm or less, and
(b)
60 to 1, where the nominal rope diameter is greater than 25.4 mm.
197(5)An employer shall ensure that the sheave diameter to rope diameter ratio of a friction hoist is equal to or greater than
(a)
80 to 1, for stranded ropes, and
(b)
100 to 1, for locked coil ropes.
197(6)An employer shall ensure that
(a)
a sheave is made of material that safely withstands the ambient temperatures and is fitted with a groove to fit the rope being used, and
(b)
a gauge is provided for measuring the groove radius of the sheave and that the gauge is used each time the sheave is examined to determine the amount of groove wear.
197(7)An employer shall ensure that the shaft of a sheave is examined for flaws by a non-destructive test
(a)
before being put into service in a particular location,
(b)
after installation, and
(c)
at a regular frequency as recommended by a person competent in such testing.
197(8)An employer shall ensure that a person who makes an examination pursuant to subsection (7) is competent.