Final answer:
Supported scaffolds exceeding a 4:1 height to base width ratio must be restrained for stability, following construction safety standards.
Step-by-step explanation:
Supported scaffolds with a height more than four times that minimum base width must be restrained by guying, tying, bracing, or the equivalent, to prevent it from tipping.
This is referred to as the 4:1 height to base width ratio, which is a common safety standard in the construction industry to prevent structural instability. When the scaffold exceeds this ratio, additional stability measures are essential to ensure the safety of the workers and the integrity of the scaffold structure.