This standard applies to balance beams used in gymnastics competitions and general practice. GB 8397-1987 Balance beam GB8397-1987 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Balancing beam
This standard applies to balance beams for gymnastics competitions and ordinary practice. Beam
This standard refers to the 1979 International Gymnastics Federation gymnastics equipment standard. 1 Product classification
1.1 The types of balance beams are divided into competition balance beams and ordinary practice balance beams according to their usage properties.
1.2 The basic size parameters should comply with the requirements of Figure 1 and Table 1. Figure 1
Ministry of Light Industry of the People's Republic of China approved on December 10, 198778
UDC685.64
GB 8397-—87
Implementation on June 1, 1988
Height range
Minimum H
Maximum H
Upper width B,
Middle width B2
Lower width B3
Lifting spacing
Base cross tube length L1
Inner distance S between two bottom legs
Not more than
1.3 The main raw materials shall comply with the provisions of Table 2. Part name
Technical requirements
Basic size parameters shall be in accordance with the provisions of Figure 1 and Table 1. 2.1
Technical indicators shall comply with the requirements of Table 3
3 Test methods
Indicator name
Straightness of crossbar
Force of crossbar
Compatibility
Corrosion resistance of electroplating layer
GB 8397--87
Competition type
Basic size
Limit deviation
Ordinary exercise
Basic sizeWww.bzxZ.net
Limit deviation
Ordinary exercise type
Wood or other materials with the same performance
Deviation is not more than 5mm
Static load 1350N,
Bending is not more than 8mm
Ordinary exercise type| |tt||The deviation is not more than 8mm
Each connector is tightly matched, the lifting is flexible, the locking is firm, and the base is stable. The corrosion resistance level is not less than level 7
a. The crossbar surface is flat and firmly bonded
Surface quality
b. The color of the spray paint or baking paint is uniform and consistent, and there shall be no bubbles, wrinkles, dirty spots, or paint streaks
3.1 Specifications and dimensions are measured with a vernier caliper, tape measure or special ruler with the same indication error. The corrosion resistance level is not less than level 5
a. The crossbar surface is flat and firmly bonded, and there shall be no more than 5 scars with a diameter of less than 10mm
b. The paint color is uniform and consistent, without paint streaks and exposed bottom3.2 Measurement of the straightness of the crossbar Use a thin rope with one end fixed to the top of the crossbar, and the other end passes through the crossbar longitudinally, and hang a certain weight to make the rope 79
straighten and then measure the straightness of the crossbar.
GB8397-87
3.3 Strength of the crossbeam Raise the crossbeam to a height of 1200mm, apply a static load of 1350N at the midpoint, and the maximum bending of the beam shall not exceed 8mm (see Figure 2).
【1350N
3.4 ​​The fit of the connector shall be measured by hand feel
3.5 The corrosion resistance of the electroplating layer shall be tested for 24 hours in accordance with GB5938 "Neutral Salt Spray Test (NSS) Method for Corrosion Resistance of Metal Coatings and Chemically Treated Layers of Light Industrial Products", and rated in accordance with GB5944 "Evaluation of Corrosion Test Results of Metal Coatings of Light Industrial Products". 3.6 The surface quality shall be inspected visually.
4 Inspection rules
4.1 The inspection of batch products is divided into batch inspection and periodic inspection. 4.2 Batch inspection
4.2.1 Batch inspection shall be carried out in accordance with the sub-sampling plan for general inspection level IⅡI in GB2828 "Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches)".
4.2.2 The items and clauses, test method clauses and AQL values ​​of batch inspection shall be in accordance with the provisions of Table 4: Table 4
Basic size parameters
Straightness of crossbar
Fitness
Surface quality
4.3 Periodic inspection
Clause of this standard
Test method clause
Competition type
Ordinary practice type
4.3.1 The samples for periodic inspection must be randomly selected from the samples that have passed the batch inspection and all of them must be inspected according to the batch inspection items. If unqualified products are found, they should be replaced with qualified products. 4.3.2 Periodic inspection shall be carried out every six months, and shall also be carried out when the design, key process, main raw materials are changed or production is resumed after suspension for more than three months.
4.3.3 Periodic inspection is in accordance with the provisions of the one-time sampling plan for the discrimination level II and the judgment array (12) in GB2829 "Periodic inspection counting sampling procedures and sampling tables (applicable to the inspection of the stability of the production process)". 4.3.4 The items and clauses of the periodic inspection, the test method clauses and their RQL values ​​are in accordance with the provisions of Table 5. 80
Horizontal force
Electroplating layer corrosion resistance
5 Marking, packaging, transportation, storage
Clause of this standard
GB8397-87
Test method clause
5.1 Marking: The product should have a trademark, factory name, certificate of conformity, product manual, and date of manufacture. 5.2 Packaging: According to different conditions in different regions, choose packaging materials to protect the product. Competition type
5.3 Transportation: Do not expose to rain, sun, or moisture during transportation. Be careful to handle it with care and do not squeeze or collide it. 5.4 Storage: The warehouse should be ventilated and dry (products are not allowed to be stored outdoors) and properly kept. Additional notes:
This standard was proposed by the Ministry of Light Industry of the People's Republic of China and is under the jurisdiction of the National Stationery and Sports Goods Standardization and Quality Inspection Center. Ordinary practice type
This standard was drafted by Shanghai Stationery and Educational Goods Industry Research Institute, Tianjin Chunhe Sports Goods Factory, Shanghai Sports Equipment Factory No. 1, Guangzhou Dongfang Sports Equipment Factory, Beijing Sports Equipment Factory, and Chengdu Sports Equipment Factory. 81
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