Vietnam: Fire resistance limits for urban underground railway structures

19:08, 10/07/2024

Here is the noteworthy content stipulated in Circular 11/2018/TT-BXD of Ministry of Construction of Vietnam promulgating the National Technical Regulation on underground railway structures - QCVN 08:2018/BXD.

The structures of urban underground railway structures in Vietnam must meet the following fire resistance limits:

Structure Name	Fire Resistance Limit, not less than
Shell of station halls, intermediate halls, tunnels, and structures adjacent to tunnels or stations	R90
Shell of train tunnels and dead-end tunnels	R90
Station pillars	R90
Partition walls of elevator shafts and stairwells in tunnels	REI 120
Walls of stairwells	REI 120
Walls of auxiliary stations	R 90/EI 60
Walls and ceilings of flammable oil and paint storage rooms	REI 120
Shell of elevator shafts and station lobbies	R60
Partition walls between passageways and cable-ventilation trenches	R 45
Beams, stair body, stairwells	R60
Covering structure of the beam slab's inner layer	REI 60/R60
Walls of escape routes between tunnels	R 45 (EI 45)
Self-closing fire doors	EI30
Load-bearing and enclosing structures above platforms and station passageways	REI 90
Suspended ceilings in corridors	RE 15

Refer to the relevant regulations in Circular 11/2018/TT-BXD,which comes into force in Vietnam from March 15, 2019.

- Thanh Lam -

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