Page 59

shem_en

12. HOISTING Use a lifting beam of an appropriate length when lifting large sheets and plate structures. Make sure that there are enough brackets for your lift. The brackets help you avoid any deformation of the item you are lifting. When installing bulkheads or other parts, to prevent falling have the crane take the weight of the bulkhead until it is supported. If necessary, use the guiding rope in order to control the load and avoid manual control e.g. in windy conditions. Be careful that the lifting chain or wire rope sling does not come loose from the crane hook prematurely when you lower the sheet. Keep behind the load in case it falls. Hoisting of plates Think and choose safe and appropriate lifting gear for each lift. Use lifting gear with an intermediate carrier to lift long plates. The carrier should be wide enough to prevent the plate from bending or slipping. The following rule of thumb can be used to calculate the weight of a plate: a plate that is 1 meter long and 1 meter wide, weighs 8 kg per each millimetre of plate thickness. For example: a plate that is 5 m x 2 m x 10 mm, weighs 5 x 2 x 10 x 8 = 800 kg. 59


shem_en
To see the actual publication please follow the link above