Frequently Asked Questions: Smart Slings
Answer:The Smart Sling™ system will immediately alert users of the situation. First through the base station, the laptop will display a red “Overload” alert on the screen. Since there is a direct connection between the sling and the base, this alert will be seen even if there is no internet connection available on site. In addition, if there is an internet connection, the alerts will also immediately be transmitted through text message and email to any registered users on the system. They will receive this alert no matter where they are located, as long as they have access to the device registered.
Once the sling has been overloaded, it will show the Overload status on the system even after the load has been removed. This ensures that a severely overloaded sling will not be used again in a questionable state. The sling must be returned to an authorized Slingmax® repair station. If the sling passes inspection and proof load, then the Smart Sling™ system will be reset and the sling can be put back into service.
In addition, Slingmax® has taken some extra steps to decrease the chance for interference. One is Smart Sling™ operates on the 915 MHz band, rather than the more crowded 2.4 GHz that is used for most Wifi and equipment remote controls. The other is Smart Sling™ constantly hops between different frequencies in the assigned band. If there is interference on one frequency, it will only be on that for seconds before moving to the next.
In the event of an overload, the Smart Sling mechanical system immediately engages, indicating that the load on the sling has exceeded over twice its rated capacity.
A Load Moment Indicator (LMI) is designed to monitor the entire load, which protects your crane. However, each individual sling is not monitored. Smart Sling monitors loads on each individual sling in your lift plan. Individual slings may be overloaded due to variables such as improper rigging, extreme sling angles, dynamic loading, and uneven load distribution. Any of these may cause one or more individual slings to be overloaded while the total load remains below the capacity of the crane.