Wooden Lattice Girder for Construction
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Abstract
The invention proposes a wooden lattice girder 1 for construction comprising an upper chord 4 and a lower chord 5, connected to each other by struts 2, having tenons 7 each at the ends thereof, wherein the tenons 7 at one end each of the struts 2 are glued into mortises 9 on the upper chord 4, running in the longitudinal direction of the upper chord 4, and the tenons 7 at the other end of the struts 2 are glued into mortises 9 on the lower chord 5, running in the longitudinal direction of the lower chord 5. The lateral surfaces 12 of a respective mortise 9 running in the longitudinal direction thereof encompass an acute angle and the surfaces 10 of the tenon 7 glued to said lateral surfaces 12 of said mortise 9 encompass a corresponding acute angle.
90 Citations
16 Claims
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1-8. -8. (canceled)
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9. A wooden lattice girder for construction, the girder comprising:
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an upper chord, said upper cord having upper cord mortises running in a longitudinal direction of said upper cord with lateral surfaces of said upper chord mortises running in longitudinal directions thereof subtending an upper acute angle, said upper chord mortises having, when viewed in side elevation, circular and/or oval-shaped upper chord partial areas; a lower chord, said lower chord having lower chord mortises running in a longitudinal direction of said lower chord with lateral surfaces of said lower chord mortises running in longitudinal directions thereof subtending a lower acute angle, said lower chord mortises having, when viewed in side elevation, circular and/or oval-shaped lower chord partial areas; and struts connected between said upper chord and said lower chord, said struts having upper tenons at upper ends thereof, each of said upper tenons being inserted into and glued within a respective one of said upper mortises, wherein surfaces of said upper tenons glued to said lateral surfaces of said upper chord mortises encompass a corresponding said upper acute angle, said struts also having lower tenons at lower ends thereof, each of said lower tenons being inserted into and glued within a respective one of said lower mortises, wherein surfaces of said lower tenons glued to said lateral surfaces of said lower chord mortises encompass a corresponding said lower acute angle, said upper and said lower tenons having cross-sections which are substantially rectangular in shape, wherein dovetail shapes of said struts are matched to said upper and said lower chord partial areas and lengths of said upper and lower chord mortises in said longitudinal direction of said upper and lower chords substantially correspond to dimensions of respective said upper and respective said lower tenons inserted therein. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification