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J1305 - Two-Block Warning and Limit Systems in Lifting Crane Service

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Document Number: J1305
Project Initiation: 06-28-2013
Sponsor Name: Michael Brunet
Title
Two-Block Warning and Limit Systems in Lifting Crane Service
Scope
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.
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