吊装起重作业安全培训课件.ppt

* * * The reason for left hand or right hand lay is to accommodate the different winch designs from various manufacturers. The end of the winch to which the rope is anchored and the direction of winch loading each effect the decision of which lay is the correct lay. The incorrect lay will result in rapid wear of the rope, increased number of broken wires and difficulty in maintaining an orderly laying of the rope onto the winch drum. Has any class member ever experienced problems with a FSWR when trying to wind it onto a winch drum? The most probable cause is that it was the wrong direction lay for the winch! * In regular lay ropes, the wires in the strands are laid in one direction, while the strands in the rope are laid in the opposite direction. The result is that the wire crown runs approximately parallel to the longitudinal axis of the rope. These ropes have good resistance to kinking and twisting and are easy to handle. They are also able to withstand considerable crushing and distortion due to the short length of exposed wires. This type of rope has the widest range of applications. * Have the class members provide their thoughts of suitable allowances Write the student ‘guess’ on the board for future discussion Do not provide comment at this stage * 用于绑扎的钢丝绳吊索不得用插接、打结或绳卡固定连接的方法缩短或加长。绑扎时锐角处应加护衬垫，以防钢丝绳损坏。 　　2．采用穿套结索法，应选用足够长的吊索，以确保挡套处角度不超过120°，且在挡套处不得向下施加损坏吊索的压紧力。 　　3．吊索绕过吊重的曲率半径应不小于该绳径的2倍。 　　4．绑扎吊运大型或薄壁物件时，应采取加固措施。 　　5．注意风载荷对物体引起的受力变化。 * 　平行吊装绑扎法一般有两种。一种是用一个吊点，仅用于短小、重量轻的物品。在绑扎前应找准物件的重心，使被吊装的物件处于水平状态，这种方法简便实用，常采用单支吊索穿套结索法吊装作业。根据所吊物件的整体和松散性，选用单圈或双圈穿套结索法， 　另一种是用两个吊点，这种吊装方法是绑扎在物件的两端，常采用双支穿套结索法和吊篮式结索法 * Q A / Discussion It is strongly recommended that a 10 to 15 minute question and answer period be held at the end of this training session. Inform participants that if they have any feedback regarding this training package, they may contact BSF HSE Training or other qualified Slinging lifting Subject matter expert. * Q A / Discussion It is strongly recomm