Cad é aicme oibre craein droichid?
The working class of a bridge crane indicates the intensity of its operational workload, specifically reflecting the time-based workload and load capacity of the crane. Hook-type cranes are classified into three levels and seven categories: A1-A3 (light duty); A4-A5 (medium duty); A6-A7 (heavy duty). The magnitude of a bridge crane's duty class is determined by two capabilities: the frequency of crane usage, called the utilization rate; and the magnitude of loads borne, called the load condition. During its effective service life, a bridge crane undergoes a specific total cycle of duty cycles. A duty cycle encompasses the entire operational process from preparing to lift a load until the next lifting operation begins. The total number of work cycles indicates the crane's utilization rate and serves as a fundamental parameter for classification. This total represents the sum of all work cycles performed during the specified service life. Chun saol seirbhíse cuí a chinneadh, ní mór fachtóirí eacnamaíocha, teicniúla agus comhshaoil a mheas, agus éifeachtaí an trealaimh ag dul in aois a chur san áireamh freisin.