REFUGE STAIR HALL EQUIPPED WITH EXHAUST DUCT

摘要

The present invention comprises: an entrance to the refuge stair hall; 1st refuge stairs leading upstairs from the entrance; 2nd refuge stairs leading downstairs from the entrance; and an exhaust duct for emitting smoke flowing in via the entrance. In the refuge stair hall according to an additional aspect of the present invention, the exhaust duct comprises a screen which: is formed on the inner wall; induces smoke, that flows into the exhaust duct from smoke inflow holes of the exhaust duct, to flow upstairs; and blocks smoke, that ascends from the downstairs through the exhaust duct, from flowing backward to the refuge stair hall through the smoke inflow holes of the upstairs exhaust duct. The refuge stair hall according to another additional aspect of the present invention additionally comprises: a 1st smoke blocking part for preventing smoke from spreading upstairs through the space above the 1st refuge stairs of the refuge stair hall; and a 2nd smoke blocking part for preventing smoke from spreading downstairs through the space above the 2nd refuge stairs of the refuge stair hall. The refuge stair hall according to another additional aspect of the present invention additionally comprises: a refuge hole formed in the floor of the landing of the refuge stair hall; and a refuge moving device which is inserted into the refuge hole and is fixedly provided on the landing of the downstairs refuge stair hall.