Abstract: With the global trend of centralized and economical utilization of resources, the common shaft pattern of smoke extraction duct and HVAC duct is a kind of space-optimized compact arrangement. But comparing with traditional pattern, the high fire safety hazard will also result in huge potential problem for the property and life safety. In order to balance the relationship between fire safety and resource optimization in points of thermal insulation,smoke control and flame retardant, the related requirements in current fire codes and standards are analyzed based on the summarization of potential fire safety hazard of above- mentioned common shaft pattern. Some suggestions are given on the corresponding fire safety countermeasures.

Key words: fire protection, smoke extraction duct, HVAC duct;common shaft pattern