When selecting rigging specifications, the size, weight, shape of the load to be lifted, and the hoisting method to be adopted must be taken into consideration in the calculation, and the requirements for the ultimate working force must be given. At the same time, the working environment, The type of load must be considered. It is necessary to select a rigging with sufficient capacity and the appropriate length to meet the usage mode. If multiple riggings are used to lift the load at the same time, the same type of rigging must be selected; the raw materials of the flat rigging must not be affected by the environment or load. Regardless of whether attachments or soft lifting lugs are required, careful consideration must be given to matching the end sections of the rigging with auxiliary attachments and lifting equipment.

When using a flat sling with soft lifting lugs, the minimum length of the lifting lugs used must not be less than 3.5 times the maximum thickness of the hook at the contact part of the lifting lugs, and the movement angle of the lifting lugs must not exceed 20°. When connecting a sling with a soft lifting eye to a lifting appliance, the contact parts of the sling and the lifting appliance must be consistent, unless the axial width of the sling does not exceed 75mm, and the bending radius of the lifting accessory must be at least the sling 0.75 times the axial width. For example: the radius of the sling on the cargo hook should be at least 0.75 times the axial width of the sling. The width of the fabric may be affected by the radius of the inner part of the cargo hook. The effect of the curvature of the cargo hook will hinder the balanced effect of the strong force in the width range of the fabric. Slings are strictly prohibited from being overloaded and must use the correct method coefficient. Some of the methods of ultimate working force may have been given on the label. Multiple combination slings cannot exceed the maximum angle with the vertical direction.

Plan your lifting and light handling plans before you begin lifting.

The rigging must be correctly placed and connected to the load in a safe manner. The rigging must be placed on the load so that the load can act evenly across the width of the sling; the seams of the sling must never be knotted or twisted. The seams of the sling must not be placed on hooks or lifting equipment. on, and always placed on the upright part of the sling, to prevent damage to the tag by keeping it away from the load, hooks and locking angles.

The evaluation of the ultimate working force of multiple combined slings depends on the symmetry of the load borne by the combined slings, that is, when lifting, the branches of the slings are distributed symmetrically and evenly according to the design, and have the same vertical angle. For a three-branch combination sling, if the branches cannot bear the force evenly according to the design, the maximum strength is on one branch, which will be the sum of the maximum bearing capacity of the branches adjacent to the design angle. The same result will be in a four-branch combination sling. If not Rigid loads will also be taken into account. (Note: For rigid loads, most of the gravity may be borne by three, or even two, of these legs, with the remaining leg merely protecting the balance of the load.