While there isn't a specific wind speed provided that mandates an immediate shut down of crane operations, here's what you should consider:

• Manufacturer's Specifications: The most important guideline is to adhere to the crane manufacturer's specifications for maximum permissible wind speeds during operation [1]. These specifications are crucial for safe operation and should be readily available [2].
• Wind Velocity Device: Employers must provide a wind velocity device that gives a visible or audible alarm to the crane operator at a predetermined wind velocity [1]. This device should be compatible with the manufacturer's crane specifications [1].
• Hammerhead Cranes: For hammerhead cranes, operators need to be fully instructed regarding the maximum permissible wind speeds during operation [1].
• Tower Cranes: A device must be provided to display wind speed and must be mounted above the upper rotating structure on tower cranes [3].
• Securing for Out-of-Service Cranes: If the crane is located out-of-doors, ensure it is locked in a secure position to prevent it from being blown along or off the track by a severe wind [4].

It's essential to identify the wind speed at which the manufacturer recommends ceasing operations and to have systems in place to monitor wind conditions and alert operators accordingly. If manufacturer procedures are unavailable, the employer must develop and ensure compliance with all procedures necessary for the safe operation of the equipment and attachments [2].