Lifting Operations and Lifting Equipment Regulations 1998 and pulley systems and forklift trucks. The regulations apply to all workplaces and all the provisions of the 'Provision and Use of Work Equipment Regulations 1998' also apply to lifting equipment. A safe working load (SWL) should, according to the regulations be marked onto lifting equipment with the relevant SWL being dependent on the configuration of the equipment, accessories for lifting such as eye bolts, lifting magnets and lifting beams should also be marked. The load itself would be based on the maximum load that the equipment can lift safely. Lifting equipment that is designed for lifting people must also
Block and tackle each of the parts of the rope must be "F/n." This means the input force on the rope is "F"="F/n." Thus, the block and tackle reduces the input force by the factor "n." Ideal mechanical advantage correlates directly with velocity ratio. The velocity ratio of a tackle is the ratio between the velocity of the hauling line to that of the hauled load. A line with a mechanical advantage of 4 has a velocity ratio of 4:1. In other words, to raise a load at 1 metre per second, the hauling part of the rope must be pulled at 4