R 408.41104
R 408.41104 Definitions; J to R .
Cite as Mich. Admin. Code R 408.41104
Rule 1104. (1) "Job-built ladder" means a ladder, other than a manufactured
ladder, that is usually built at the jobsite .
(2) "Ladder" means an appliance that usually consists of 2 side rails which are
joined at regular intervals by crosspieces which are called steps, rungs, or cleats and
on which a person may step to ascend or descend .
(3) "Ladder safety device" means a device, other than a cage or well, that is
designed to eliminate or reduce the possibility of accidental falls .
(4) "Lower levels" means those levels to which an employee can fall from a ladder.
Such areas include ground levels, floors, ramps, runways, excavations, pits, water,
and similar surfaces. The term does not include the surface from which the employee
falls .
(5) "Manufactured ladder" means a commercially made ladder .
(6) "Maximum intended load" means the total load of all employees, equipment,
tools, materials, transmitted loads, and other loads that are anticipated to be applied to a
ladder compartment at any one time .
(7) "Pitch" means the included angle which is between the horizontal and the ladder
and which is measured on the opposite side of the ladder from the climbing side .
(8) "Platform ladder" means a self-supporting type of fixed size stepladder that
has a platform provided at the working level. The size is determined by the distance
along the front rail from the platform to the base of the ladder .
(9) "Portable ladder" means a ladder which is not permanently fixed in place and
which may be used at various locations .
(10) "Rail ladder" means a fixed ladder which consists of side rails that are joined
at regular intervals by rungs or cleats and which is fastened along its entire length or
in sections to a building, structure, or equipment .
(11) "Rungs" means a ladder's crosspieces of circular or oval cross section on
which a person may step to ascend or descend .