213.41(1)Where an employee is performing maintenance or repairs on a mobile crane that is raised from the ground by means of jacks or hoists, other than outriggers or stabilizers, an employer shall ensure that the mobile crane is adequately blocked.

213.41(2)An employer shall ensure that an employee does not work under or go under the raised parts of a mobile crane unless the parts are adequately blocked, or the crane is raised by its outriggers or stabilizers, and no employee shall work under or go under such raised parts unless the parts are adequately blocked, or the crane is raised by means of its outriggers or stabilizers.