Acts and Regulations

91-191 - General

Section 137
Disposition versions

Full text
Horse scaffolds
137(1)Where the horses for a horse scaffold are constructed of wood, an employer shall ensure that
(a) the horizontal members of bearers are not smaller than 50 mm thick by 125 mm wide,
(b) the legs are not smaller than 50 mm thick by 100 mm wide,
(c) the longitudinal braces between legs are not smaller than 25 mm thick by 150 mm wide,
(d) the gusset braces at the top of the legs are not smaller than 25 mm thick by 200 mm wide, and
(e) the half diagonal braces are not smaller than 25 mm thick by 100 mm wide.
137(2)An employer shall ensure that the horses for a horse scaffold are
(a) placed on a secure footing and not raised in height by blocking or extensions,
(b) spaced not more than
(i) 1.5 m apart for a scaffold supporting 3.6 kPa or more,
(ii) 2.3 m apart for a scaffold supporting 1.2 kPa to 3.5 kPa, and
(iii) 3 m apart for a scaffold supporting less than 1.2 kPa, and
(c) placed directly over one another and, if more than two tiers high, each tier is secured to a building or structure.
137(3)An employer shall ensure that a platform of a horse scaffold
(a) if supported by single tier horses, does not exceed 5 m in height,
(b) if supported by tiered horses, does not exceed three tiers or 3.7 m in height, whichever is the lower, and
(c) is secured to the legs of the horses to prevent movement.