초록 ▼

There is provided a new and useful wooden structural member comprising a pair of elongated flanges each having a surface and a longitudinally extending groove in the surface, the groove having a bottom, and wherein at least one side of the groove is at an angle to the surface such that the groove is

There is provided a new and useful wooden structural member comprising a pair of elongated flanges each having a surface and a longitudinally extending groove in the surface, the groove having a bottom, and wherein at least one side of the groove is at an angle to the surface such that the groove is tapered from the surface to the bottom; an upwardly projecting compression ridge extending longitudinally along the bottom of the groove; and a web disposed between the flanges and having first and second longitudinal edges, at least one side of the edges being tapered, the edges secured within respective ones of the grooves, and each edge having a longitudinally extending central kerf therein, the depth of the kerfs being greater than the depth of the grooves; and wherein (a) prior to the insertion of the edges into the grooves, (i) the thickness of each edge at its extremity is not greater than the width of the bottom of the groove, and (ii) the thickness of each edge at a distance from its extremity equal to the depth of the grooves is greater than the width of the grooves at the surface of the flange, (b) the width of the compression ridge at its base is at least equal to the width of the kerf at its outer extremity, and (c) the height of the ridge is substantially less than the depth of the kerf.

대표청구항 ▼

A wooden structural member comprising: a pair of elongated flanges each having a surface and a longitudinally extending groove in said surface, each said groove having first and second sides and a bottom, and wherein at least one said side of each said groove is at an angle to said surface such that

A wooden structural member comprising: a pair of elongated flanges each having a surface and a longitudinally extending groove in said surface, each said groove having first and second sides and a bottom, and wherein at least one said side of each said groove is at an angle to said surface such that each said groove is tapered from said surface to said bottom; an upwardly projecting compression ridge extending longitudinally along said bottom of each said groove, said ridge having a base; and a web disposed between said flanges and having first and second longitudinal edges, said edges having first and second sides, at least one said side of said edges being tapered, one of said edges secured within each said groove, and each of said edges having a longitudinally extending central kerf therein, the depth of each said kerf being greater than the depth of each said groove; and wherein (a) prior to the insertion of one of said edges into each said groove, (i) the thickness of each of said edges at its extremity is not greater than the width of said bottom of said groove, and (ii) the thickness of each of said edges at a distance from its extremity equal to the depth of each said groove is greater than the width of each said groove at said surface of said flange, (b) the width of said compression ridge at said base is at least equal to the width of said kerf at its outer extremity; and (c) the height of said ridge is substantially less than the depth of said kerf.