Double Head Lifting Pin Anchor
When the construction unit purchases or leases coil buckle components and accessories by itself, it shall sign a quality assurance agreement with the manufacturer or leasing enterprise
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The municipal construction safety and quality general station shall, according to the collection information and daily supervision and inspection, Regularly publish the comprehensive evaluation information of manufacturers or leasing enterprises
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2、 Strengthen the mobilization management of coil buckle components and accessories
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The sampling requirement is to select 8 pieces for the strength of connecting plate and inner circumferential weld, the compressive strength of adjustable support and base of each inspection lot, and 3 pieces for the dimensional deviation of horizontal rod and inclined rod, as well as the dimensional deviation and mechanical properties of vertical rod
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The testing organization shall test and evaluate the strength of the connecting plate and the inner circumferential weld, the adjustable support and the compressive strength of the base in accordance with the current socket and disc buckle steel pipe support components (JG / t503); The dimensional deviation of horizontal and inclined rods, as well as the dimensional deviation and mechanical properties of vertical rods shall be tested and evaluated in accordance with the current socket and turnbuckle steel pipe support components (JG / t503), tensile test of metallic materials Part 1: room temperature test method (GB / t228.1) and low alloy high strength structural steel (GB / t1591)
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Notice of Ningbo Municipal Bureau of housing and urban rural development on Further Strengthening the management of socket and buckle steel pipe support components and fittings in construction, competent departments of housing and urban rural construction in all districts, counties (cities) and functional parks, municipal construction safety and quality general station, construction market general station, construction industry Association, Municipal Industry Association, construction supervision and bidding Consulting Industry Association Construction Engineering Testing Industry Association and relevant units: in order to promote the quality and safety standardization of construction in our city, further implement the improvement standard for safe and civilized construction of housing construction projects in Ningbo (YJF [2021] No
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4、 Strengthen the supervision and management of the use of buckle components and accessories on the construction site (I) strictly implement various regulations
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All parties involved in the construction shall be urged to strictly comply with the notice of Ningbo Municipal Bureau of housing and urban rural development on Further Strengthening the safety management provisions on dangerous divisional and subdivisional projects and clarifying relevant work requirements (YJF [2021] No
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When used for scaffolding of housing construction projects, for projects with a total construction area of ≤ 50000 m2, each 25000 M2 is an inspection lot (if it is less than 25000 m2, it is calculated as 25000 m2) > For projects with an area of more than 50000 m2, one inspection lot will be added for each additional 50000 m2 (those less than 50000 m2 will be calculated as 50000 m2)
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The competent departments of housing and urban rural construction in all localities shall strengthen the daily supervision and random inspection of the buckle components and accessories on the construction site, and shall implement no less than 50% supervision and testing for the engineering projects using the buckle components and accessories
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The quality inspection report of the buckle structure parts issued by the inspection organization shall specify the inspection basis and inspection conclusion, and indicate the source (manufacturer, leasing enterprise, etc.) information of the buckle structure parts
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The supervision unit shall strengthen the witness sampling and use management of socket and turnbuckle components and fittings, and carry out sampling and inspection in strict accordance with the requirements of sampling batch quantity and inspection items
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At the same time, it shall also strictly check the appearance quality, outer diameter dimension, wall thickness and product identification on the surface of the main components and accessories
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When used in municipal engineering, if the use weight is ≤ 10000 tons, every 2000 tons is one inspection lot (if less than 2000 tons, it shall be calculated as 2000 tons) ＞ For 10000 tons, an inspection lot will be added for every 4000 tons (less than 4000 tons will be calculated as 4000 tons)
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69), strengthen the management of socket and disc buckle steel pipe support components and fittings of housing construction and municipal infrastructure projects in our city, and effectively prevent and resolve safety risks, According to relevant laws, regulations and standards, and in combination with the actual situation of our city, the relevant matters are hereby notified as follows: first, strengthen the source management of coil buckle components and accessories
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The surfaces of vertical pole, horizontal pole, inclined pole and other components and fittings shall be hot-dip galvanized, and the surfaces of adjustable base and adjustable support shall be dip painted or cold galvanized
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Further optimize the business environment of the market for the rental and use of buckle components and accessories, develop and build the information collection system of buckle components and accessories, and the local competent departments of housing and urban rural development urge the construction, supervision and testing units of housing municipal projects under their jurisdiction to timely input the use and management information of buckle components and accessories
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The construction unit shall formulate and implement corresponding management measures to prevent cross mixing of buckle structures and accessories from different manufacturers or leasing enterprises
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The information entry method and relevant requirements will be issued separately（ 3） Strengthen the main responsibility of quality and safety
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The construction unit shall establish management systems such as leasing (purchase), mobilization plan, mobilization acceptance, sampling and inspection, daily maintenance, scrap treatment, etc
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The municipal construction safety and quality general station shall incorporate the supervision and management of fasteners and fittings at each site into the content of hierarchical inspection and supervision
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3、 The quality inspection and testing of the coil buckle components and accessories before use shall be strictly carried out
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The outer diameter, wall thickness and connecting plate thickness of the steel pipe shall not be lower than those specified in the current socket and buckle steel pipe support components (JG / t503), and the production unit, mobilization quantity, specification and time of the buckle components shall be recorded
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If the quality assurance data are incomplete, or the size and appearance quality are unqualified, or the product identification is not set according to the standard requirements, or the product identification is unknown, the buckle components and accessories shall not enter the construction site
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69) To promote the use of new tool scaffold and formwork support（ 2） Implement the market information collection system
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In addition to providing quality assurance materials such as product certificate, main technical parameters and product operation manual of disc buckle components and accessories, the manufacturer or leasing enterprise shall also provide product type inspection report or quality inspection report (the inspection items include but are not limited to raw material performance, appearance and process, dimensional deviation, component strength and bearing capacity of connecting plate)
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The buckle structure parts shall not be used without inspection or unqualified inspection（ 2） Requirements for division and sampling of inspection lots
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When it is used for formwork support of housing construction engineering, if the weight is ≤ 1000 tons, each 200 tons is an inspection lot (if it is less than 200 tons, it shall be calculated as 200 tons) ＞ For 1000 tons, an inspection lot will be added for every 400 tons (less than 400 tons will be calculated as 400 tons)
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In case of deformation, corrosion, cracks and other non-conforming conditions found during daily patrol inspection, the construction unit shall be urged to clean up and leave the site in time（ 1） Matters related to entrusted testing
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22) and the notice on printing and distributing the improvement standard of safe and civilized construction of housing construction projects in Ningbo (YJF [2021] No
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Before the use of the coil buckle components and accessories entering the construction site, the construction unit shall timely send the samples to the testing organization with corresponding qualifications for testing after the sampling witnessed by the supervisor
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The components and fittings of socket and turnbuckle steel pipe support used on the construction site shall comply with the current technical specification for safety of socket and turnbuckle steel pipe support in building construction (jgj231) and socket and turnbuckle steel pipe support components (JG / t503), and the main components and fittings such as upright and horizontal rods shall have clear steel seal marks (including but not limited to the manufacturer Product model and steel specification information) to ensure that the product source is formal and the quality can be traced
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For engineering projects that adopt but fail to select socket and turnbuckle and other new tool scaffolds and formwork support as required, as well as engineering projects that use components and accessories that do not meet the requirements of corresponding specifications and standards, their qualification to apply for excellent construction site of provincial and municipal construction safety production standardization management shall be cancelled.
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If different manufacturers or leasing enterprises are used for the same project, they shall be tested respectively according to the above requirements
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When the buckle components and accessories enter the construction site, the construction unit shall check the quality assurance data of the buckle components and accessories and keep relevant accounts
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The project shall be divided and used according to the construction unit (single body or single beam section), so as to avoid the mixing of buckle components and accessories provided by different leasing enterprises or produced by different manufacturers in the same construction unit
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