The purpose of this SAE Recommended Practice is to establish the minimum performance requirements of devices which signal and/or automatically prevent two-blocking.
This SAE Recommended practice applies to cranes in lifting crane service which are equipped with two-block warning and/or limit systems.
This SAE Recommended practice applies to cranes in lifting crane service which are equipped with two-block warning and/or limit systems.
SAE J1305_200711 History
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