ISO 3078:2016 pdf free

ISO 3078:2016 pdf free.Shipbuilding一Cargo winches
The stress calculation of the mechanical parts is based on the following:
a) the drum load on the winch: in this case, the allowable calculated stresses based on simple theoretical elastic limit of any part of the winch shall not be greater than 0,4 times the 0,2 % proof stress of the material;
b) the maximum torque of the motor corresponding to the most severe working conditions: in this case, the allowable calculated stresses based on simple theoretical elastic limit of any part of the winch shall not be greater than 0,9 times the 0,2 % proof stress of the material.
NOTE For the winch equipped with a torque limiter, the setting value by the torque limiter.
The direction of motion of the operating control devices shall be such that the load is raised by clockwise movement at a hand-wheel or crank-handle, or alternatively movement of a hand-lever towards the operator.
Whatever the form of motive power, the operating control device shall be arranged to return to the braking position automatically when the operator releases the control.
Reference should be made to the ILO Code of practice on Safety and health in dock work.
The control stations shall be arranged such that the operator can observe the operating area of the lifting appliances and the load being lifted.
The length of rope reeling off of the drum shall be appropriate to any operating positions within the design working range of the lifting appliances and in any case not less than three turns of rope remaining on the drum.
Rope shall be capable of reeling onto the drum evenly and if necessary, coiler or other device may be fitted. The length of the rope drum shall be such that the rope will reel onto the drum in not more than three layers, but it is recommended that, where practicable, the rope should reel onto the drum in a single layer. The rope may reel up onto the drum in more than three layers if either one of the following requirements is met:
a) the coiler is fitted;
b) the drum has rope groove;
c)  the reeling angle is restricted up to 2°.ISO 3078 pdf free.