This specification is formulated to ensure that the design and production of gantry and derrick material hoists meet safety requirements and are used correctly during construction, to ensure construction and personal safety. This specification is applicable to high and low-rise material hoists with a rated lifting capacity of less than 2000kg, powered by ground winches and running vertically along guide rails during construction of new construction, renovation, demolition and other projects. JGJ 88-1992 Safety Technical Specifications for Gantry and Derrick Material Hoists JGJ88-1992 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
Gantry and derrick material hoist
Safety Technical Specification
JGJ88-92
1992Beijing
Zhejiang Provincial Standardization and Research Institute
Industry Standard of the People's Republic of China
Gantry and derrick material hoist
Safety Technical Specification
JGJ 88-92
Editor: Tianjin Construction Engineering Bureau
Approval Department: Ministry of Construction of the People's Republic of China Effective Date: August 1, 1993
China Planning Press
1992Beijing
Notice on the Issuance of the Industry Standard "Safety Technical Specifications for Gantry and Derrick Material Hoists"
Jianbiao [1993] No. 26
According to the requirements of the former Ministry of Urban and Rural Construction and Environmental Protection (86) Chengkezi No. 263, the "Safety Technical Specifications for Gantry and Derrick Material Hoists" edited by Tianjin Construction Engineering Bureau has been reviewed and approved as an industry standard, numbered JGJ88-92, and will be implemented from August 1, 1993.
This standard is managed by the Construction Science Research Institute of China Construction First Engineering Bureau, the technical unit responsible for construction safety standards of the Ministry of Construction, interpreted by Tianjin Construction Engineering Bureau, and published by the Standard and Quota Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
January 12, 1993
Chapter 1 General
Chapter 2
Chapter 3
Section 1
Section 2
Chapter 4
Chapter 5
Chapter 6
Chapter 7
General Provisions
Structural Design and Manufacturing
Structural Design
Structural Manufacturing
Lifting Mechanism
Item 1
Safety Protection Devices and Requirements…．
Foundation, wall frame, guy rope and anchor
Section 1
Section 2
Section 3
Section 4
Chapter 8
Section 1
Section 2
Section 3
Section 4Www.bzxZ.net
Chapter 9
Installation and dismantling
"General provisions
Installation and dismantling of the frame Dismantling
Winch stabilization
Overall installation and dismantling of low-rise gantry
Inspection rules and test methods
Section 1
Section 2
Inspection rules
Test methods
Use and management
Chapter 10
Section 1
Section 2
(5)
Appendix 2||t t||Appendix 3
Appendix 4
Term explanation
Frame structure calculation
Construction example
Terms used in this specification
Additional explanation
Appendix: Explanation of clauses
Chapter 1 General
Article 1.0.1 This specification is formulated to ensure that the design and production of gantry and derrick material hoists (hereinafter referred to as hoists) meet safety requirements and are used correctly during construction, and to ensure construction and personal safety.
Article 1.0.2 This specification is applicable to high and low frame material hoists with a rated lifting capacity of less than 2000kg, powered by ground winches, and running vertically along guide rails in the construction of new construction, renovation, demolition and other projects.
Note: The lifting height is less than 30m (including 30m) for low frame; the lifting height is 31~150m for high frame. Article 0.3 The design, manufacture, installation and use of hoists shall comply with the provisions of the current national "Safety Regulations for Hoisting Machinery" and other relevant standards in addition to complying with this specification.
Chapter II
General Provisions
Article 2.0.1 When manufacturing a hoist, a design plan should be proposed first, and drawings, calculations and quality assurance measures should be available.
Article 2.0.2 The hoist should have a product label indicating the rated lifting capacity, maximum lifting speed, maximum erection height, manufacturing unit, product number and factory date. Article 2.0.3 The color of the hoist basket and the frame should be clearly distinguished. Article 2.0.4 Before leaving the factory, the hoist should be inspected in accordance with regulations and accompanied by a product certificate.
Article 2.0.5 Personnel who install the hoist frame should be trained and certified according to the requirements for high-altitude workers.
Article 2. Article 0.6 After the installation of the hoist is completed, it must be formally inspected and accepted, and can only be put into use after meeting the requirements.
Article 2.0.7 The user unit shall formulate operating procedures according to the type of hoist, and establish a management system and maintenance system.
Article 2.0.8 The user unit shall establish equipment technical files for each hoist, and the content shall include: acceptance, maintenance, testing and accident conditions. Machine.
Article 2.0.9 A full-time driver who has passed the formal examination and holds an operating certificate shall be equipped. 2
Chapter 3 Structural Design and Manufacturing
Section 1 Structural Design
Article 3.1.1 The design of the steel structure of the hoist (hereinafter referred to as the structure) shall meet the strength, rigidity and stability requirements under various conditions such as manufacturing, transportation, installation and use, and its structural calculation shall comply with the provisions of the current national standard "Steel Structure Design Code". Article 3.1.2 The following loads shall be considered in the structural design: 1. Calculated loads under working conditions. Including: self-weight, lifting load and wind load in working state;
2. Calculation load in non-working state. Including: self-weight and wind load in non-working state;
3. The calculation of load shall comply with the provisions of the current national standard "Code for Loads of Building Structures".
Article 3.1.3 The selection of structural materials shall comply with the following provisions: When the calculated temperature of the use area is higher than -20℃, the steel material of the load-bearing structure should be No. 3 steel; when it is equal to or lower than -20℃, No. 3 calm steel or 16Mn, 16Mn bridge steel should be used.
Note: The calculation temperature is determined according to the current national standard "Design Code for Heating, Ventilation and Air Conditioning" on the outdoor calculation temperature of air conditioning in winter.
Article 3.1.4 In addition to meeting the strength requirements (the calculation method can be referred to Appendix 2 of this code), the main load-bearing components shall also meet the following requirements: 1. The converted slenderness ratio of the column shall not be greater than 120, and the slenderness ratio of a single leg shall not be greater than 0.7 times the larger value of the slenderness ratio of the two directions of the component. 2. The slenderness ratio of general compression members shall not be greater than 150; 3. The slenderness ratio of tension members should not be greater than 200; 4. The deflection of the main beam in the bending member () shall not be greater than 1/700, and that of other bending members shall not be greater than 1/400 (1 is the calculated length of the bending member). Article 3.1.5 The calculation of member connections shall comply with the provisions of Chapter 7 of the current national standard "Code for Design of Steel Structures".
Article 3.1.6 For members connected by bolts, bolts below M10 shall not be used. The number of bolts at each node of each member and one side of the joint shall not be less than 2. Article 3.1.7 The connecting parts of lattice components shall be of tie-bar type. The columns of the gantry shall be provided with cross-partitions every 4 to 6 m, and each standard section shall not be less than 2; the cross-partitions may be made of steel plates with a thickness of 6 to 10 mm or angle steels with a cross section of not less than L50×5, and the strength may not be verified.
Article 3.1.8 The frame of the parallel hoist shall be strengthened at the openings connected to the passages on each floor.
Article 3.1.9 The free height of the top of the hoist frame shall not be greater than 6 m. Article 3.1.10 The top beam of the hoist shall be made of steel sections, and two channel steels shall be selected. The cross-sectional height shall be determined by calculation, but shall not be less than 2 [14. Article 3.1.11 The rods of the hoist basket shall be made of steel sections. The thickness of the rod connecting plate shall not be less than 8 mm. In addition to being manufactured according to the design, the bottom plate material of the hanging basket structure frame can be 50mm thick wooden boards. When steel plates are used, anti-skid measures should be taken. Safety baffles or nets with a height of not less than 1m should be set on both sides of the hanging basket. Overhead hoists should use hanging cages with protective top plates, and the top plate material can be 50mm thick wooden boards. Article 3.1.12 The guide shoes of the hanging basket can generally use roller guide shoes or sliding guide shoes, but roller guide shoes must be used in any of the following situations: 1. Hoists powered by friction winches; 2. Hoists whose frame columns also serve as guide rails; 3. Overhead hoists.
Article 3.1.13 When the hoist is equipped with a rocker arm handle, the column and foundation must be checked and calculated, and should be reinforced. The arm length of the handle is generally not more than 6m, and the lifting capacity does not exceed 600kg. When angle steel is used, the middle section shall not be less than 240mm×240mm, and the angle steel shall not be less than 30×4; when seamless steel pipe is used, the outer diameter of the steel pipe shall not be less than 121mm. The handle support shall be set at the node where the single limb is connected to the attachment. ·4·
Section 2 Structural Manufacturing
Section 3.2.Article 1 The materials used in the hoist structure shall comply with the requirements of national standards and this specification, and material tests shall be carried out in accordance with the regulations. Article 3.2.2 The bottom section of the hoist frame should be made of seamless steel pipes. Article 3.2.3 Before production, the processing technology should be written according to the requirements of the design documents and drawings, and the process inspection should be strictly followed.
Article 3.2.4 The manufacturing accuracy of the components shall meet the installation accuracy requirements. The frame assembled by multiple sections shall ensure that its standard sections are interchangeable. Article 3.2.5 The manufacturing quality of the hoist structure shall comply with the provisions of the current national standard "Steel Structure Engineering Construction and Acceptance Code" and other standards. ·5
Chapter 4
Lifting Mechanism
Article 4.0.1 The selection or manufacture of the winch shall meet the requirements of the rated lifting weight, lifting height, lifting speed and other parameters. Article 4.0.2 The hoist should use a reversible winch, and the overhead hoist shall not use a friction winch.
Article 4.0.3 The distance from the flanges at both ends of the drum to the outermost wire rope should not be less than 2 times the diameter of the wire rope. The edge of the drum must be equipped with a protective device to prevent the wire rope from slipping out.
Article 4.0.4 The ratio of the diameter of the drum to the wire rope should not be less than 30. Article 4.0.5 The winch should comply with the provisions of the current national standard "Construction Winches".
Article 4.0.6 The ratio of the pulley diameter of the pulley block to the wire rope diameter: low-frame hoists should not be less than 25; high-frame hoists should not be less than 30. Article 4.0.7 The pulley should be supported by rolling bearings. The pulley block and the frame (or hanging basket) should be rigidly connected. It is strictly prohibited to use flexible connections such as wire ropes and lead wires and use open pulleys.
Article 4.0.8 2"
For hoists powered by friction winches, the pulleys shall be equipped with anti-slip groove devices.
Article 4.0.9 The maximum working tension of the lifting wire rope shall be determined according to the following formula: S
Wherein, S—-maximum working tension of the wire rope (N); P—lifting load (N);
a——number of branches of the load-bearing wire rope;
n—total efficiency of the pulley block.
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