Research of the behavioral of the wooden beams with fire protection lining under fire loading

Abstract

Abstract. This article highlights the current issues of ensuring the fire resistance of wooden beams as load-bearing structures. Scientists have studied various types of fire protection of wood from the effects of fire. In the existing methods of fire protection, fire-retardant impregnating materials, fire-retardant paint, commercial fire-retardant coverings are presented. In addition, a study on the creation of fire-retardant materials was conducted. Therefore, in the field of our research there are the issues of using fire-protective plywood as a fire-retardant cladding method of protection of wooden structures. This article describes the process of manufacturing fire-retardant plywood made of 2-millimeter sheet of veneer and impregnated with a flame retardant using the method of technological baths and glued in a pressed machine to the appropriate thickness. Then in the experimental setup, fire tests were performed at standard temperature for three intervals of exposure to determine the depth of charring. These studies make it possible to draw conclusions about the effectiveness of the proposed method of fire protection of wooden structures and to determine the calculated class of fire resistance for these structures.