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JGJ276-2012: Technical code for safety of lifting in construction Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
JGJ 276-2012: Technical code for safety of lifting in construction---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JGJ276-2012UDC JGJ INDUSTRY STANDARD OF THE PEOPLE��S REPUBLIC OF CHINA Record No.. J 1354-2012 Technical Code for Safety of Lifting in Construction Issued on. JANUARY 11, 2012 Implemented on. JUNE 1, 2012 Issued by. Ministry of Housing and Urban-Rural Development of the People��s Republic of China INDUSTRY STANDARD OF THE PEOPLE��S REPUBLIC OF CHINA Technical Code for Safety of Lifting in Construction Approved by. Ministry of Housing and Urban-Rural Development of the People��s Republic of China Implemented on. JUNE 1, 2012 Beijing 2012 Table of ContentsForeword... 4 1 General Provisions... 7 2 Terms and Symbols... 8 3 Basic Requirements... 11 4 Hoisting Machinery and Rigging Equipment... 14 5 Lifting of Concrete Structure... 28 6 Lifting of Steel Structure... 35 7 Installing of Net Rack... 38 Appendix A Selection Rules of Sling Tension... 44 Appendix B Calculation of Horizontal Hanging Beam... 46 Appendix C Allowable Load of Pulley and Force-Saving Coefficient of Pulley Block ... 49 Appendix D Structure Parameters of Anchor and Stress Calculation... 51 Explanation of Wording in This Code... 66 List of Quoted Standards... 67 Technical Code for Safety of Lifting in Construction1 General Provisions1.0.1 This Code is formulated in order to implement the safety production policy and ensure the safety of crane lifting operations in architecture engineering. 1.0.2 This Code applies to crane lifting operations in construction of architecture engineering. 1.0.3 The crane lifting operations during construction of architecture engineering shall not only comply with this Code, but also comply with the relevant current national standards.2 Terms and Symbols2.1 Terms 2.1.1 Crane lifting operation The construction process of using lifting equipment to lift or move the hoisted objects to the designated location and installing them as required. 2.1.2 Hoist auxiliaries Tools, machines and accessories for tying and fixing the objects being lifted, such as slings, hooks, lifting beams and snap rings, etc. 2.1.3 Tightening Before lifting, use slings and snap rings to bind the lifting points of the objects to be hoisted according to hoisting provisions. 2.1.4 Hoisting The process of lifting and aerial transportation of objects to be hoisted. 2.1.5 Anti-sway rope Tie a rope to the lifted structure and have the person below pull it to prevent the structure from swinging arbitrarily during the lifting process. 2.2 Symbols A �C area; �� �C distance; b �C thickness, width; D, d �C diameter; f �C design value of the bearing capacity; F �C tension, resistance; [F] �C allowable tension; H �C height; i �C transmission ratio; K �C coefficient; L �C length; M �C bending moment; N - axial force;3 Basic Requirements3.0.1 Before crane lifting operations, a special construction plan for the lifting operations must be prepared, and safety technical measures must be explained; during the operation, no changes may be made without the approval of the technical person in charge. 3.0.2 Special operation personnels such as crane operators, lifting signal workers, and rigging workers must hold special operation qualification certificates to work. Non-crane drivers are strictly prohibited from driving or operating cranes. 3.0.3 Before crane lifting operations, the used machinery, pulleys, hoist auxiliaries and ground anchors shall be inspected and must meet safety requirements. 3.0.4 Lifting personnels must wear non-slip shoes and safety helmets, and safety belts shall be worn when working at heights. They shall be fastened reliably and can be low-hanging. 3.0.5 The access road for lifting equipment shall be smooth and the bearing capacity shall meet the equipment access requirements. Obvious signs shall be set up around the lifting operation area; and non-operators are strictly prohibited from entering. 3.0.6 The upper end of the climbing ladder shall be fixed, the hanging basket and temporary workbench used at high altitude shall be firmly fixed; and a protective railing of no less than 1.2m shall be installed. The scaffolding boards of the hanging basket and workbench shall be flat and fastened; and probe boards are strictly prohibited.4 Hoisting Machinery and Rigging Equipment4.1 Hoisting machinery 4.1.1 All hoisting machinery that is newly purchased, overhauled, renovated, newly-installed, newly-used, or out of service for a period exceeding the prescribed time shall undergo technical inspection in accordance with relevant provisions and be used only after passing the inspection. 4.1.2 When the crane starts operating in each shift, it shall be tested for lifting first, and the operation can only be carried out after confirming that the brake is sensitive and reliable. It is not allowed to leave the post without permission and maintain the locomotive during operation. 4.1.3 The selection of the crane shall meet the requirements for lifting capacity, lifting height, and working radius. At the same time, the minimum rod length of the boom shall meet the operating requirements for lifting across obstacles. 4.1.4 The use of self-propelled cranes shall comply with the following provisions. 4.1.5 The use of tower cranes shall comply with the relevant provisions in current national standards GB 5144 Safety Code for Tower Cranes, JGJ 196 Technical Specification for Safety Installation Operation and Dismantlement of Tower Crane in Construction, and JGJ 33 Technical Specification for Safety Use of Construction Machines. 4.1.6 The manufacture and installation of the mast crane shall comply with the following provisions. 4.1.7 The use of mast cranes shall comply with the following provisions. 4.2 Rope 4.2.1 The white and brown ropes used in lifting operations shall comply with the following provisions. 4.2.2 The use of fiber ropes and polyester multifilament ropes shall comply with the relevant provisions of current national standards GB/T 21328 Fiber Ropes - General Specifications, GB/T 11787 Polyester Multifilament Ropes, and GB/T 8834 Ropes - Determination of Certain Physical and Mechanical Properties. 4.2.3 The use, inspection, tensile strength value and scrapping of steel ropes in lifting operations shall comply with the relevant provisions of the current national standards GB 8918 Steel Wire Ropes for Important Purposes, GB/T 20118 Steel Wire Ropes for General Purposes and GB/T 5972 Cranes - Wire Ropes - Care, Maintenance, Installation, Examination and Discard. 4.3 Sling 4.3.2 Sling accessories shall comply with the following provisions. 4.3.3 The transverse hanging beam shall be made of Q235 or Q345 steel, and shall be designed and calculated. The calculation method shall be carried out in accordance with Appendix B of this Code; and the transverse hanging beam shall be manufactured according to the design. 4.4 Hoisting and lifting equipment 4.4.1 The use of pulleys and pulley blocks shall comply with the following provisions. 4.4.6 The use of jacks shall comply with the following provisions. 4.5 Anchor 4.5.1 The structure of the vertical anchor shall comply with the following provisions. 4.5.2 The structure of the pile-type anchor shall comply with the following provisions. 4.5.3 The structure of the horizontal anchor shall comply with the following provisions. 4.5.4 The use of various types of anchors shall comply with the following provisions.5 Lifting of Concrete Structure5.1 General Requirements 5.1.1 The transportation of components shall comply with the following provisions. 5.1.2 The stacking of components shall comply with the following provisions. 5.1.3 The turning over of components shall comply with the following provisions. 5.1.6 Before the components are hoisted, their strength shall comply with the design provisions; and all formwork, mortar residues, garbage fragments, etc. on them shall be removed. 5.1.7 After the floor slabs and roof slabs are lifted, covers or enclosures shall be installed on the gaps and holes left between or above each other; and shall comply with the provisions of the current industry standard JGJ 80 Technical Code for Working Safely at Height of Building Construction. 5.1.8 For multi-span single-story factory buildings, it should lift the main span first and then the auxiliary span; lift the high span first and then the low span. For multi-story factory buildings, it should lift the middle first, then the two sides, and then the corners, and this shall be done symmetrically. 5.1.9 Obstacles within the lifting range shall be removed before operation. 5.2 Lifting of Single-Factory Building 5.2.1 The lifting of columns shall comply with the following provisions. 5.3 Hoisting of Multi-Layer Frame Structure 5.3.1 The lifting of frame columns shall comply with the following provisions. 5.3.2 The lifting of floor beams shall comply with the following provisions. 5.3.3 The lifting of floor slabs shall comply with the following provisions. 5.4 Lifting of Wallboard Structure 5.4.1 The lifting of prefabricated large plate structures shall comply with the following provisions. 5.4.2 The lifting of frame hanging panels shall comply with the following provisions. 5.4.3 The lifting of industrial building wall panels shall comply with the following provisions.6 Lifting of Steel Structure6.1 General Requirements 6.1.1 Steel components shall be supplied in accordance with the prescribed lifting sequence. During loading and unloading, loading and unloading machinery shall not move close to the foundation pit. 6.1.2 The stacking site of steel components shall be flat; and the components shall be placed flat and stable to avoid deformation. 6.1.3 The grouting at the bottom of the column shall be carried out after the column has been corrected or the first section of the steel frame on the bottom floor has been corrected and the anchor bolts have been tightened. 6.1.4 The operating platform, scaffolding and wind protection facilities shall be inspected before operation. 6.1.5 After the columns and beams are installed, if the profiled steel plate for pouring the floor slab is not installed, an appropriate amount of walkway plates with handrails for lifting and joint connection operations shall be laid on the steel beams. Profiled steel plates shall be welded as they are laid. 6.1.6 The lifting procedure shall comply with the provisions of the construction organization design. The setting of balance ropes or anti-sway ropes shall be clear. For the lifting of irregular components, the location of the lifting points, tightening, installation, correction and fixing methods shall be clear. 6.2 Lifting of Steel Structure Plant 6.2.1 Steel column lifting shall comply with the following provisions. 6.2.2 The lifting of crane beams shall comply with the following provisions. 6.2.3 The lifting of the steel roof truss shall comply with the following provisions. 6.2.4 The skylight frame shall be assembled with the roof truss in advance for one-time lifting. 6.3 Lifting of High-Rise Steel Structure 6.3.1 Steel column lifting shall comply with the following provisions. 6.4 Lifting of Light Steel Structure and Portal-Rigid Frame 6.4.1 The lifting of light steel structure shall comply with the following provisions. 6.4.2 The lifting of portal-rigid frame shall comply with the following provisions.7 Installing of Net Rack7.1 General Requirements 7.1.1 Lifting operations should be carried out in accordance with the provisions of the construction organization design. 7.1.2 Steel pipe welders at the construction site should pass the all-position welding process assessment of the connection between the welded ball joint and the steel pipe and pass the welder examination before they can start work. 7.1.3 The lifting method shall be comprehensively determined based on the stress and structural characteristics of the net rack, while ensuring quality, safety, and progress, and combined with local construction technical conditions. 7.1.4 The selection of the location and number of lifting points shall comply with the following provisions. 7.2 Installing with High Bulk Method 7.2.1 When the cantilever method is used for construction, it shall be gradually expanded after it is assembled into a structural system that can withstand its own weight. 7.2.2 When erecting the assembled bracket, the position of the support point on the bracket shall be set at the node of the lower chord of the net rack. The bearing capacity and stability of the bracket shall be checked and tested if necessary, and measures should be taken to prevent the pillar from sinking. 7.2.3 The assembly shall be carried out simultaneously with two triangles from one end of the building. After the two triangles intersect, they shall be advanced roof truss by roof truss in a herringbone shape, and finally closed in the middle of the other end (Figure 7.2.3). �� ~ �� -- installation sequence Figure 7.2.3 -- Installation Sequence of Net Rack 7.2.4 After the net rack block of the first roof truss is in place, a jack support shall be placed on a square log under the middle vertical rod of the lower chord. At the same time, two fir poles shall be tied between the upper chord and the adjacent columns for temporary fixation. After the other blocks are in place, bolts shall be used to fix them with the fixed net rack blocks; and the lower chords shall be supported by jacks placed on square logs. 7.2.5 The axis deviation of each roof truss net rack block shall be corrected with a theodolite; the elevation deviation shall be corrected with a jack at the bottom chord node. 7.2.6 During the installation of net rack blocks, the high-strength bolts connecting the blocks shall be tightened as the installation progresses. 7.2.7 The jacks and poles can be removed only after all the net rack blocks have been installed and passed a comprehensive quality inspection. The jacks shall be dropped one by one in an organized manner. Each time they fall, the descending ratio of the jacks in the center, middle and surrounding areas of the net rack shall be 2.1.5.1. 7.3 Installing with Subsection and Block 7.3.1 When the net rack is divided into strips or blocks and connected into a whole at high altitude, its component units shall have sufficient stiffness and shall be able to ensure their own geometric invariance. Otherwise, temporary reinforcement measures shall be taken. 7.3.2 Temporary bolts and other fixing measures may be used where strips and strips or blocks and blocks come together. 7.3.3 When setting up independent support points or assembled brackets, the requirements of Subclause 7.2.2 of this Code shall be met. 7.3.4 When closing, jacks shall be used to lift the net rack units to the design elevation before connection. 7.3.5 Intermediate transportation of net rack units shall be reduced, and measures shall be taken to prevent deformation during transportation. 7.4 Installing with Aerial Sliding Method 7.4.1 Existing structures shall be used as high-altitude assembly platforms. When there is no building available, an assembly platform with a width greater than two intersections shall be set at the sliding end. When sliding, walkways shall be set up outside the slide rails at both ends. 7.4.2 When the translation span of the net rack is greater than 50m, it should add a translation track in the middle of the span. 7.4.5 When the net rack slides, both sides shall advance simultaneously. When the synchronization difference reaches 30mm, the machine shall be stopped for adjustment. 7.5 Whole Hanging Method 7.5.1 The whole lifting of the net rack can be carried out by single or multiple pull-out rods according to the construction conditions and requirements, or one or more cranes can be used to lift it in place. 7.6 Installing with Whole Hanging and Lift-Up Method 7.6.1 The whole lifting method of the net rack shall comply with the following provisions. 7.6.2 The whole lifting method of the net rack shall comply with the following provisions. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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