This standard specifies the special safety requirements for Mast Climbing Work Platforms (MCWP) which are temporarily installed and are manuelly or power operated and which are designed to be used by one or more persons from which to carry out work. The vertical moving components (work platform) are also used to move those same persons and their equipmenet and materials to and from a single boarding point. These restrictions differentiate MCWPs from Builder' s hoists.