HOME COMPANY CATEGORIES CONTACTS ROCKFALL DEBRIS FLOW SNOW STOP CONSOLIDATION ANTI-EROSION GEOSYNTHETICS FOREST LIFT STAINLESS STEEL AGRICULTURE CHAIN AND ROPE SLINGS LIFTING STEEL ROPES CHAIN AND ROPE SLINGS SYNTHETIC FIBER SLINGS ACCESSORIES CHAIN AND ROPE SLINGS VARIATION OF THE CAPACITY ACCORDING TO THE ANGLE AT THE VERTEX The maximum load of use or capacity is the maximum static mass that is allowed to be raised, lowered or suspended in straight traction under normal conditions of use and provided that the harness does not show any signs of deterioration for which the removal of the service is envisaged. We specify that the maximum load of use does not always correspond to the voltagepassing through the working axis of the sling or its components. With the same mass lifted, the axial stress is greater the more the axis direction deviates from the vertical. Since the working coefficient must refer to the axial effort and not to the lifted mass, in the most frequent cases, in which the load is suspended in the basket with two or more arms spread apart, the maximum working load must be recalculated. To make it more practical to use the slings used in the basket and for slings with two arms, the standards provide for the indication of the maximum theoretical vertical use load, that at an angle up to 90 ° and up to 120 °: the first when you are sure to use the slings with apex angle up to 7 °, the second up to 90 °, Flow rate calculation example You want to know the load capacity of a 2-leg sling with a vertex angle of 70 ° (vertical load of 10,000 kg). The angle is obtained from the graph with the ratio between the length of the arm L and the distance of the connections A. The flow rate is then divided vertically by the coefficient C in correspondence with the angle at the vertex of 70 ° (C = 1.221). Sling capacity at 70 ° angle = 10,000: 1,221 = 8,190 kg Use with vertex angles greater than 120 ° is not recommended: beyond this limit, the maximum load of use varies greatly with small variations in the angle. This indication applies to general uses while the slings can be dimensioned more precisely in all those of the maximum angle of use, by calculating the tension on the individual arms. Recall that when the mass is supported by a four-arm harness or by a double basket, the tension is rarely distributed evenly over the four arms. More often it rests on three arms, or even only on two diagonally opposite arms, while the remaining two simply keep it in balance. When conditions are such that the load is supported by only two arms, the load capacity of the column relative to the two arms must be taken into account. A considerable improvement in the distribution of stresses can be obtained by using sling bars. The working coefficient used for sizing the slings with bells and hooks is 5 for the steel ropes, 4 for the chains and equal to or greater than 4 for the steel terminals. Request information Chain tie rods Download Under Crane Download Chain Download Accessories Download Rich. info Grade 100 On request Rich. info Grade 80 catalog Download Slot-slot tie rods according to EN 13414-1 Tie-rod slot - slot according to EN 13414-1 with textile core Res. 1,770 N / mmq SAFETY COEFFICIENT 5 FLOW RATE ... Rich. info Bell-hook tie rods type CN2G Tie rod bell - hook type CN2Ga 2 arms SAFETY COEFFICIENT 5 CAPACITY Bell nominal ø of the rope ... Rich. info Bell tie rods - hook type CN4G Bell tie rod - hook type CN4Ga 4 arms SAFETY COEFFICIENT 5 LOAD bell ø ... Rich. info CPS tie rod with slip hook CPS tie rod with textile core 1.770 N / mmq SAFETY COEFFICIENT 5 nominal ø of the rope Slot LOAD AxB ... Rich. info INCOFIL TECH SRL Via degli Artigiani, 52 38057 Pergine Valsugana (TN) - ITALY t. +39 0461 534000 - info@incofil.com P.IVA IT 02309520225 Privacy policy Webmaster area Site created by webtonic .it