Burglar and Residential Fire Alarm Practice Test

Falls from height are one of the most serious hazards on a residential job site, so protection is required once a worker could fall six feet or more to a lower level. That six-foot threshold is the standard rule, meaning a harness or other form of fall protection must be used when there’s a potential for a six-foot or greater fall. The other numbers don’t match the typical rule: four feet is below the standard point at which protection becomes mandatory, while eight or ten feet would make protection required only at higher heights than the regulatory threshold. So six feet is the correct, practical limit for using a harness in this context.