Standard ICS number:Building materials and buildings>>Building elements>>91.060.30 Ceilings, floors, stairs
Standard Classification Number:Engineering Construction>>Industrial and Civil Engineering>>P32 Building Structure and Decoration Engineering
associated standards
Publication information
publishing house:China Architecture & Building Press
Publication date:1993-06-01
other information
drafter:Yu Benying, Miao Liugen, Huang Jiguang
Drafting unit:China Building Standard Design Institute, Jiangsu Academy of Architectural Science
Focal point unit:China Building Standard Design Institute, the technical authority responsible for building structural components standards of the Ministry of Construction
Proposing unit:Ministry of Construction of the People's Republic of China
Publishing department:Ministry of Construction of the People's Republic of China
This standard specifies the technical requirements, test methods, inspection rules, marking, stacking and transportation of precast concrete stairs for residential buildings. This standard applies to single-run and double-run staircases produced in component factories and prefabricated on site for residential buildings. JG 3002.1-1992 Precast concrete stairs for residential buildings JG3002.1-1992 Standard download decompression password: www.bzxz.net
Some standard content:
Engineering Construction Standard Full Text Information System Construction Industry Standard of the People's Republic of China JG3002.192 Residential Stairs Prefabricated Concrete King Stairs Residential Stairs Prefabricated Concrete Published on October 10, 1992 Ministry of Construction of the People's Republic of China Engineering Construction Standard Full Text Information System flights 1993-06-01Implementation . Engineering Construction Standard Full Text Information System Subject Content and Scope of Application Construction Industry Standard of the People's Republic of China Prefabricated Concrete Stairs for Residential Stairs Residential Stairs Stair PrefabricatedconcreteflightsJG3002.1-92 Specifies the technical requirements, test methods, inspection rules, marking, stacking and transportation of prefabricated concrete staircases (hereinafter referred to as staircases) for residential buildings. This standard applies to single-run and double-run staircases of residential buildings produced in component factories and prefabricated on site. 2 Referenced standards Concrete structure design code GBJ321Precast concrete component quality inspection and assessment standardGBJ204 GBJ107 Concrete structure engineering construction and acceptance codeConcrete strength inspection and assessment standard Building structure load code GBJ101 Building staircase modulus coordination standard GBJ16Building design fire prevention code GBJ45High-rise civil building design fire protection codeJGJ37General design of civil buildings (trial)GB1499Reinforcement bars for reinforced concrete GB1344|| tt||Slag Portland Cement, Pozzolanic Portland Cement, Fly Ash Portland Cement Portland Cement, Ordinary Portland Cement Quality Standard and Test Method for Sand for Ordinary Concrete JGJ53 , Quality Standard and Test Method for Crushed Stone or Pebbles for Ordinary Concrete JGJ63 Standard for Water for Concrete Mixing JGJ56 Quality Standard and Test Method for Concrete Water Reducer GBJ119 Technical Specification for Application of Concrete Admixtures 3 Terminology 3.1 Stairs are a combination of one or more continuous flights and platforms used to connect building planes of different elevations. Ministry of Construction of the People's Republic of China Issued on October 10, 1992 Engineering Construction Standard Full Text Information System Implementation on June 1, 1993 bzsos,m Engineering Construction Standard Full Text Information System bZxz.net 3.2 Flight The combination of several continuous steps between two platforms. 3.3 Width of stair flight The horizontal distance between the edges of the flight perpendicular to the walking direction. Step The step consisting of the step surface and the step riser (or without riser). 3.4 3.5 Going The horizontal distance between the front edges of two adjacent steps. 3.6 Rise The vertical distance between the surfaces of two adjacent steps. 4 Product Classification According to the structural type, it is divided into plate-type flight, beam-plate flight and inclined beam-shelf flight. Stair section code Stair tread 4.2.1 The type of plate-type stair section is 1, the type of beam-plate stair section is 2, and the type of inclined beam-shelf type stair section shelf is 3. 4.3 Code for inclined beam of inclined beam-shelf type stair section Stair section inclined beam 4.3.1 The inclined beam of inclined beam shelf type stair section without staggered steps is type 1, and the inclined beam with staggered steps is type 2. 4.4 Code example The stair section width is 1200mm, with 7 steps. The type of plate-type stair section is 1, code: TB127-1. The horizontal projection length of the stair section inclined beam is 2400mm. The type of stair section inclined beam is 2, code: TL24-2. 5 Technical requirements 5.1 Basic requirements 5.1.1 The minimum dimension of the stair section width must comply with the provisions of JGJ37. 5.1.2 The width and height of the steps shall comply with the provisions of GBJ101. 5.1.3 The width of the stair section and the length of its horizontal projection shall comply with the provisions of GBJ101. 5.1.4 The number of steps in each stair section shall not exceed 18 and shall not be less than 3. Engineering Construction Standard Full-text Information System bzsoso,om Engineering Construction Standard Full-text Information System 5.2 Materials 5.2.1 Constituent materials 5.2.1.1 Steel shall comply with the provisions of GB1499. 5.2.1.2 Cement shall comply with the provisions of GB1344 and GB175. 5.2.1.3 Sand shall comply with the provisions of JGJ52. 5.2.1.4 Gravel shall comply with the provisions of JGJ53. 5.2.1.5 Mixing water shall comply with the provisions of IG63 5.1.6 Admixtures shall comply with the provisions of JGJ56 and GBJ119. 5.2.2 The quality requirements for the entry, transportation, storage and processing of steel bars and concrete raw materials shall comply with the provisions of GBJ204. 5.2.3 The concrete strength grade shall not be lower than C20. The hook must be made of Class I hot-rolled steel bars that have not been cold-drawn. It is strictly forbidden to replace them with other steel bars. 5.2.4 5.3 Structural performance The structural performance of the components shall comply with the design requirements and the provisions of Chapter 7 of GBJ321, and various test indicators shall be indicated on the design drawings. The fire resistance requirements of the ladder section shall comply with the provisions of GBJ16 and GBJ45. Dimension deviation The dimension deviation of the component shall comply with the provisions of Table 1. Table Height (thickness) Lateral bending Surface flatness Diagonal difference Main reinforcement Protective layer Step height Step width Stair slab Stair side beam Center line offset of embedded parts Height position of pre-prepared parts Allowable deviation Inspection method Measure the parallel length part with a ruler Measure one end or the middle with a ruler||tt ||Measure one end or the middle Pull the wire with a ruler, measure the lateral bend from the maximum 2m ruler and wedge-shaped feeler gauge Measure the two diagonals with a ruler Use a ruler or special measuring instrument Leveling ruler to measure at both ends of the board End or middle Measure the center line in the longitudinal and transverse directions Measure the middle of the pre-prepared part in the thickness direction of the component Note: ①Measure the thickness of the plate-type staircase, the height of the beam of the beam-plate staircase or the inclined beam-shelf staircase; ② is the length of the staircase component. Engineering Construction Standard Full Text Information System bzsos,mEngineering Construction Standard Full Text Information System 5.6 Appearance Quality The appearance quality of the component shall comply with the provisions of Table 2. Item Any part Main stress-bearing part Secondary part Affect the structure Performance and use Do not affect the structure Performance and use Appearance defect Appearance defect Connection part Test method Concrete looseness and Embedded parts looseness Quality requirements Should not have Exposed total length Should not exceed 300mm Should not have Should not have Total area should not exceed 0.8% of the surface Length of any part should not exceed 8cm Should not have Cracks should not exceed 0.2mm Maximum length should not exceed 1/500 Should not exceed 3% of the surface Should not have Should not have The structural performance test method should comply with the relevant provisions of GBJ321. 7 Inspection rules 7.1 Before leaving the factory, the components must be inspected by the inspection department of the manufacturer. Inspection method Observation, measurement with ruler Measurement with one hundred grid Measurement with scale magnifying glass Observation, measurement with ruler Observation, measurement with one hundred grid Observation, shaking 7.2 Factory inspection items: Strength, dimensional deviation, appearance quality, and structural performance of steel and concrete. 7.3 The inspection methods for dimensional deviation and appearance quality shall comply with the provisions of Table 1 and Table 2. 7. In batch and sampling 7.4.1 The same component type, the same unit project, and the same process are normally produced as a batch. 7.4.2 On the basis of the observation and inspection of the appearance quality piece by piece, 5% random sampling shall be carried out, and the total sampling quantity shall not be less than 3 pieces for appearance quality and dimensional deviation measurement inspection. 7.4.3 The structural performance shall be inspected by randomly selecting a test piece from the components normally produced in half a year. 7.5 The principles for component quality inspection and evaluation shall comply with the relevant provisions of GBJ321. 7.6 The quality inspection rules for ladder components prefabricated on the construction site can be carried out in accordance with the ladder components produced by the component factory. 8 Marking, stacking, and transportation 8.1 Marking Engineering Construction Standard Full-text Information System bzsos,comEngineering Construction Standard Full-text Information System 8.1.1 The factory name (factory mark), product code, production date (year, month, day) and production team must be marked on the obvious part of the component, and the acceptance stamp shall be stamped according to the inspection results. 8.1.2 When the manufacturer supplies products to the purchaser, it must issue a "certificate of conformity" to deliver to the user. 8.1.3 The "certificate of conformity" shall indicate the standard number, certificate number, project name, component code, production and factory date, concrete test strength and date, weight, structural performance, and quality grade. 8.2 Stacking and transportation 8.21 The components can be lifted, stacked and transported only when the concrete strength reaches 75% of the design strength standard value. 8..2 When stacking and transporting components, the cushions should be placed near the hook and must be on the same vertical line up and down. 8..3 The number of stacked components should not exceed 5. Additional notes: This standard was proposed by the Ministry of Construction of the People's Republic of China. This standard is under the jurisdiction of the China Building Standard Design Institute, the technical unit responsible for building structure component standards of the Ministry of Construction. This standard was drafted by the China Building Standard Design Institute and the Jiangsu Academy of Building Sciences. The main drafters of this standard: Yu Benying, Miao Liugen, Huang Ji This standard is entrusted to the China Building Standard Design Institute for interpretation. XXX Engineering Construction Standard Full Text Information System bzsos,m Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.