Glued timber trussed joist, joint and method
AssigneePatenttitoimisto T. Poutanen Oy
InventorTuomo Poutanen
Life of this patent
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Abstract
A glued trussed joist, joint and method are provided which include two chords, the lower chord and the upper chord located a distance from each other and two elongated webs are located between the chords. The upper ends of the webs are connected in the upper chord and the lower ends of the webs connected in the lower chord. The lower ends of the webs have at least one tenon finger and the lower chord has a matching mortise routing. The tenon fingers are inserted using glue to make a joint to resist forces and moments in the joist and the chord routing goes through the chord.
Claims19
A joint in a glued trussed joist comprising:
- a first chord that has an inner face and an opposite outer face;
- a second chord that has an inner face that faces the inner face of the first chord and an opposite outer face that faces away from the first chord, the first and second chords being spaced apart;
- a first elongated web having an upper end and an opposite lower end;
- and
- a second elongated web having an upper end and an opposite lower end;
- wherein the upper end of the first elongated web and the upper end of the second elongated web are connected to the first chord and the lower end of the first elongated web and the lower end of the second elongated web are connected to the second chord such that the first and second elongated webs define a crosswise opening;
- wherein the lower end of each of the first elongated web and the second elongated web has at least one straight or tapering tenon finger;
- wherein the second chord has a mortise routing formed therein that is complementary to and receives the tenon fingers of the first and second elongated webs to create the joint in the second chord using glue, the first elongated web being in tension and being fixed in the mortise routing with a fingertip of the first elongated web, that is formed at the lower end of the first elongated web, being visible at the outer face of the second chord.
A joint in a glued trussed joist comprising:
- a first chord that has an inner face and an opposite outer face;
- a second chord that has an inner face that faces the inner face of the first chord and an opposite outer face, the first and second chords being spaced apart;
- a first elongated web having an upper end and an opposite lower end;
- and
- a second elongated web having an upper end and an opposite lower end;
- wherein the upper end of the first elongated web and the upper end of the second elongated web are connected to the first chord and the lower end of the first elongated web and the lower end of the second elongated web are connected to the second chord such that the first and second elongated webs define a crosswise opening having one of about a triangular shape and a trapezoidal shape;
- wherein the lower end of each of the first elongated web and the second elongated web has at least one straight or tapering tenon finger;
- wherein the second chord has a mortise routing formed therein that is complementary to and receives the tenon fingers of the first and second elongated webs to create the joint in the second chord using glue, the mortise routing of the second chord extending through the second chord so as to be open along both the inner face and the outer face and being defined by first and second routing ends, an open gap is formed between at least one of the first and second routing ends of the mortise routing and the at least one straight or tapering tenon finger of one of the first elongated web and the second elongated web, thereby defining a continuous fluid pathway within the mortise routing from the opening of the mortise routing at the inner face to the opening of the mortise routing at the outer face.
A method for performing quality assurance of an integrity of a joint of a trussed joist that includes a chord with an inner face and opposite outer face and at least one straight or tapering mortise finger in the chord and at least two webs, with tenon fingers matching with a mortise routing formed through the chord, wherein the at least two webs are inserted from an inner side of the chord in the mortise routing and glue is used to make the joint resistive to stresses in the joist, the method comprising the step of:
- visually checking for an existence of the glue in the tenon fingers by inspecting tips or the sides of the tenon fingers from an outer face of the mortise routing that is open along the outer face of the chord or from one or more gaps that are defined between one web and one respective routing end.
Dependencies are inferred from the claim text.