PREFABRICATED REINFORCED CONCRETE FRAME OF MULTISTORY BUILDING OF HIGHER FIRE RESISTANCE Russian patent published in 2011 - IPC E04B1/18 

FIELD: construction.

SUBSTANCE: prefabricated reinforced concrete frame of multistory building includes columns and crossbars of T-shaped section hingedly connected to them in level of slab to form closed cells, and slab flooring made of hollow prestressed boards. Columns in lower floors are made with longitudinal reinforcement arranged in at least two rows, with height for several floors, and with sockets at slab level, where metal wedging cantilevers are mounted for support and tightening with bearing crossbars, and are connected to each other with displacement from top of boards by 1/2-1/4 of floor height by means of flat joint. Lower end of column includes joint metal plates with holes for reinforcement protrusions, and at the angles there are slots framed with vertical metal plates. Upper end of column includes extensions of reinforcement arranged in holes of lower end of upper column, at the same time reinforcement extensions are equipped with adjustment nuts to make it possible to change thickness of seam, with each column the following components are fixed in orthogonal directions - at least one wide prestressed bearing crossbar, forming closed cell, with provided one or two shelves for rest of slab floorings, bearing walls with height of one floor, mounted with support one onto another via contact joint and rigidly connected to each other and to columns, at the same time bearing crossbars are arranged with lower shelves and inclined walls, cut at the same angle near columns, forming rigid contact joints in plane of slab, besides, bearing crossbars have vertical slots, and walls - slots and/or through holes within thickness of slab board to make keys as joints of connection of bearing crossbars and walls with slab boards are concreted.

EFFECT: reduced time of construction, lower material intensity and labour intensiveness in manufacturing and assembly and increased fire-resistance of building.

9 dwg