METHOD OF DETERMINING FIRE SAFETY CHARACTERISTICS OF ELEMENTS AND MATERIALS OF COMPLEX FACING OF STEEL BEAM WITH CORRUGATED WALL Russian patent published in 2017 - IPC E04B1/94 E04C3/06 G01N33/20 

FIELD: construction.

SUBSTANCE: method for determining the fire safety characteristics of elements and materials of the complex facing of a steel beam with a corrugated wall includes determining the type of rolled steel, the steel grade and the geometrical characteristics of the welded I-beam of the steel beam; identification of the number of sides of the cross-section of the steel beam exposed to heat under fire conditions; finding the reduced metal thickness of the welded I-beam elements and the intensity of force stresses in the metal; establishing the indices of thermal diffusion of the insulation coating of facing materials; determining the required fire protection degree of the welded I-beam elements; finding the required fire resistance of the steel beams of the building. First, the element of the welded I-beam, weakest in the static and thermal sense, is revealed: the corrugated wall, the lower and the upper flanges; a reference point in the section of the welded I-beam element is found, the type of the reference material and the materials corresponding to it that make up the complex facing are determined; the index of the heating conditions of the reference point is determined, the dimensions of the bent profile for the welded I-beam shelves in the form of a channel and the angle for the steel beam are chosen, then the reduced thickness of the metal of the welded I-beam element is calculated with the gain. Determining the required fire protection degree for the elements of the welded I-beam of the steel beam with the corrugated wall, the optimal geometric and fire safety characteristics of the elements and materials for the complex fire protection of the welded I-beam of the steel beam are found.

EFFECT: invention allows to increase the accuracy of the choice of the geometric dimensions of the elements of the welded I-beam of the steel beam with a corrugated wall and the materials of its complex facing, optimal for fire resistance and sufficient for fire safety, to reduce the consumption of steel and large-sized sheet and plate materials of the facing, to increase the resource-saving in the process of carrying out the fire protection facing of a welded I-beam of a steel beam with a corrugated wall.

7 cl, 5 dwg, 1 tbl