Final answer:
The subject of this question is engineering.
Step-by-step explanation:
The subject of this question is engineering.
adders in elevator shafts. The spacing requirement you mentioned is designed to ensure the safety and stability of the ladder or scaffold.
Proper spacing of rungs or steps contributes to the secure footing and ease of ascent or descent for individuals using the ladder.
To summarize, the end frames of scaffolds and ladders in elevator shafts should have rungs and steps spaced not less than 6 inches (15 cm) apart and not more than 16-1/2 inches (41 cm) apart, measured along the ladder side rails.
Adhering to such spacing standards enhances workplace safety and reduces the risk of accidents or falls.