JG/T 562-2018 in English
VALIDPaecast concrete stair
- Issued on:2018-04-26
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$250.00
$243.00
$243.00
| Standard No: | JG/T 562-2018 |
| Document status: | VALID |
| Title in English: | Paecast concrete stair |
| Title in Chinese: | 预制混凝土楼梯 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-04-26 |
| Implemented on: | 2018-12-01 |
| ICS Classification: | 91.060.30-Ceilings. Floors. Stairs |
| Chinese Classification: | Q72-Concrete components and accessories |
| Professional Classification: | JG-Building |
| Related Keywords: | concrete type
type/beam-plate type material requirements concrete strength concrete stair introduction background concrete strength random inspection protective layer thickness detection civil buildings structural type includes |
| Related Topics: | building
jg/t precast concrete premixer stairs precast concrete stairs Cast-in-place reinforced concrete stairs Precast concrete staircase quality Concrete floor slab thickness standards astm d 562-2018 |
本标准规定了预制混凝土楼梯的术语和定义、分类、代号和标记、一般要求、要求、试验方法、检验规则、标志、堆放和运输、产品合格证。
本标准适用于一般工业与民用建筑中的预制混凝土楼梯。
Introduction
Background of Standard Revision and Technological Evolution
This standard replaces the two old standards JG 3002.1-1992 and JG 3002.2-1992. The main technical changes are reflected in:
| Technical Dimensions | 1992 Edition of the Standard | 2018 Edition of the Standard |
|---|---|---|
| Scope of Application | Limited to residential buildings | Extended to industrial and civil buildings |
| Structural Type | Includes inclined beam shelf-type stairs | Cancel the inclined beam type and retain the plate type/beam-plate type |
| Material requirements | Concrete strength is not specified | Added C30 minimum strength requirement |
Analysis of core technical requirements
4.1 Structural classification system
Precast stairs are divided into the following types according to their structural form:
- Slab-type stairs (YBT): Suitable for conventional load scenarios, with a commonly used width of 1200mm in residential buildings
- Beam-slab stairs (YLT): Suitable for large span or heavy load scenarios
- Lightweight aggregate concrete type: "Q" is added to the code, density ≥1400kg/m³
6.5 Structural performance inspection
The bearing capacity test must meet the following requirements: γ₀≥γ₀[γu], where:
| Failure mode | Allowable value of test coefficient |
|---|---|
| Crack width in tension zone reaches 1.5mm | 1.20 |
| Shear failure at the end of oblique crack | 1.40 |
Engineering application suggestions
Residential project selection reference
According to Clause 4.2.5 of the standard, it is recommended that a residential building with a floor height of 2.8m adopt:
- Number of steps: 16
- Step height: 175mm
- Step width: 260mm
- Projection length: 4900mm
Key points of production quality control
- Rebar cover thickness deviation ≤+3mm
- Surface flatness ≤3mm (detected with a 2m ruler)
- Anti-slip measures should be completed before leaving the factory
Acceptance precautions
Type inspection must include:
- Structural performance test (Appendix A)
- Concrete strength random inspection
- Protective layer thickness detection (JGJ/T 152)
Sample only — not a preview of JG/T 562-2018
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
