FIRE-PREVENTION DOOR LEAF Russian patent published in 2014 - IPC E06B5/00 

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, namely, to the structures of fire-prevention doors and gates. Fire-prevention door leaf comprises rectangular frame, formed by the side columns and upper and lower cross-bars; stiffening elements, attached inside the rectangular frame; steel plates, fixed on the frame, forming the front and back panels of the door leaf, inner cavity, limited by inner surfaces of steel sheets, side columns and upper and lower cross-bars, divided in sections by stiffening elements; heat-insulating packages arranged in sections of the inner cavity, comprising the inner layer made of fireproof mineral-cotton filler of high density and outer layers made of basaltic cardboard; hinges, lock; in this case, the rectangular frame consists of two columns joined inter se and upper and lower cross-bars, made of bent -shaped profile with ledge for rabbet along the entire perimeter of the frame; made of, at least, four ⊥-shaped stiffening elements, made of horizontal and vertical steel profiles, bent of rolled strip with pads at the ends for fixing to the columns and cross-bars, mounted in the rectangular frame mutually parallel with formation of gap between the stiffening elements, filled with fireproof heat-insulating material.

EFFECT: structure improvement.

8 cl, 9 dwg