What type of anchorage connector devices are not required to have guards during installation?

The correct answer is that permanent anchorage connector devices are not required to have guards during installation. This is based on the understanding that permanent anchorage systems are designed to be affixed in place and are intended for long-term use. They typically incorporate design features that ensure safety during installation and maintenance.

Since these devices are considered structurally integrated into the building or service, they are often designed to minimize hazards, including the risk of falls, without the need for additional protective measures such as guards.

In contrast, temporary and portable anchorage devices are often utilized in situations where they may be moved or removed for various tasks, requiring additional safety measures like guards to protect workers during their use. Removable anchorage devices may also require guards depending on their design and method of installation, particularly to ensure safety if they are being used in a context where they might be destabilized.