COMPOSITE CROSS-SECTION WOODEN BEAM ON KEY JOINTS Russian patent published in 2025 - IPC E04C3/12 

FIELD: construction.

SUBSTANCE: invention relates to construction, in particular to beams of floors and coatings of buildings. Composite cross-section wooden beam consists of bars attached to each other along the section height by means of links in the form of vertical coupling bolts passed through keys and placed in blind mating holes made in each of the bars, with a depth corresponding to half the height of the key. Each key is made of cylindrical shape or in form of two truncated cones with common base of larger diameter, at that, for the cylindrical key, the blind hole for its tight installation is made either cylindrical with the same diameter as the key itself, or conical with a reduced inner diameter in relation to the diameter of the cylindrical key, and for the key in the form of two truncated cones, the blind hole for its tight installation is made either conical, corresponding in shape to half of the said key, or cylindrical with a diameter corresponding to the smaller diameter of the base of the truncated cone.

EFFECT: higher strength of the beam.

1 cl, 6 dwg