Superseding
Chinese Name	������ҵ�ּ�
English Name
Chinese Standard Classification
Professional Classification
ICS Classification
Issued on	2008-10-30
Implemented on	2009-06-01
Abolished on
Issued by	AQSIQ and SAC
Chinese Pages
Word Count	3500 words

GB/T 4200-2008 Classified standard of working in the hot environment

1  Scope

This standard specifies the classification of the heat intensity of hot work environment and the limits of allowable continuous heat exposure time and rest time for the ones working in hot environments.
This standard is applicable to the multi-level management of occupational safety and health for hot environment work. The limits of allowable continuous heat exposure time are applicable to general indoor hot environment work.

2  Normative References

The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
GB/T 8170-1987, "Rules for Rounding off of Numberical Values"
GB 3869 "Classification on Intensity of Physical Work"

3  Terms and Definitions

For the purposes of this standard, the following terms and definitions apply.
3.1  Productive hot source
The production equipments, products or work pieces which can generate and emit heat in production.
3.2  Workplace
All the places where workers are engaged in occupational activities.
3.3  Work site
The places where the workers stay frequently or regularly to operate or observe the production status. The whole workshop can be referred as a worksite if a worker, as demanded by the production, operates at different points in a workshop.
3.4  WBGT-index