At what height must a safety cage begin on a fixed ladder exceeding 20 feet?

A safety cage must begin at a height of 7 feet on a fixed ladder that exceeds 20 feet. This requirement is in place to enhance safety for individuals using the ladder, as it provides a protective enclosure that helps prevent falls. The requirement is based on regulatory standards that aim to ensure the well-being of workers when accessing heights. By starting at 7 feet, the safety cage offers ample protection for users as they ascend, allowing them to concentrate on their tasks without the increased risk of falls that can occur with unprotected climbs. The height has been determined as a standard that balances safety while still allowing for practical use of the equipment in various operational environments.