Section R. 408.41104 - Definitions; J to RRule 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 .Mich. Admin. Code R. 408.41104