When would riggers be required to set the guides in the climbing frame to their minimum extension?

Setting the guides in the climbing frame to their minimum extension is crucial before climbing the tower because this adjustment ensures stability and safety during the ascent. When riggers prepare for the climbing process, having the guides at their minimum extension provides optimal support and alignment for the climbing frame, which is essential for both the riggers' safety and the integrity of the tower crane system.

This procedure minimizes potential hazards associated with an improperly extended guide frame, which could lead to instability during the climbing process. Correctly positioning the guides allows for a secure attachment of the climbing frame to the tower, facilitating safe operation as the crane ascends.

While inspections, equipment assembly, and daily operations all involve safety practices, the specific requirement to set the guides to their minimum extension directly pertains to the actual climbing phase, making this the most relevant context for this procedure.