FIREPROOF SHIELDED FIRE STAIRS Russian patent published in 2006 - IPC E06C9/00 

FIELD: civil and industrial building and building structure construction, particularly fire stairs provided with fireproof shields and water supply risers.

SUBSTANCE: stairs comprises load-bearing frame with load-bearing end barrier formed of rectangular girder frame pivotally connected one to another, flight of stairs with semi-panels and with pivotally connected barriers. The barriers are laid in plane defined by flight of stairs. The stairs also has front barriers made of rectangular nets pivotally connected one to another and clamps with end barriers. Front barrier facing the building is formed as shielding sheets of heat-resistant material in which door openings are formed. The doors are also created of the same heat-resistant material and may be opened inward shaft of the stairs. Horizontal U-shaped tube with perforated orifices is connected to load-bearing frame from building side. The perforated orifices are directed to shielding sheets. One tube end is closed from one side of axis of stairs symmetry and vertical water supply riser is connected to the tube from another end thereof. The riser extends along the full building height and is provided with fire hose connection means arranged in lower part thereof. Another water supply riser is arranged from opposite side of stairs symmetry and is formed with branches and taps adapted to attach fire hoses provided with water cannons.

EFFECT: increased efficiency of people life saving and stairs shaft shielding against fire, prevention of stairs heating, possibility to supply water to water curtain forming and fire-extinguishing equipment.

3 dwg