Composite structural beam
OwnerAndre Graffininventor
Life of this patent
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Abstract
Composite beam of polygonal cross-section comprises wooden external walls and a core of a material, such as concrete, providing the beam with its mechanical strength. The walls comprise flat elements assembled by means of bonded groove and tongue corner joints. Screws are embedded partially in the walls and partially in the core to bond the walls to the core.
Claims13
An elongated composite beam of polygonal cross-section, comprising wooden external walls defining an internal space, and a core in the space, the core comprising a material providing the beam with at least a substantial of mechanical strength, a plurality of transversely extending threaded fasteners having a threaded portion embedded partially within each wall and a threaded portion partially within the core to fasten the walls to the core, and an axially extending metal reinforcing member within said core.
A method of forming an elongated composite beam of polygonal cross-section comprising the steps of:
- partially inserting a plurality of threaded members into each of a plurality of elongated wall members so that a portion of each of the threaded members extends from each wall members;
- attaching each wall member, by adhesive bonding, to an adjacent wall member for defining an elongated hollow core enclosed by said wall members, said threaded members extending transversely into said core;
- drying said adhesively bonded wall members;
- inserting at least one elongated metal reinforcing member extending axially within said core;
- placing said attached wall members in a vertical position;
- and
- pouring concrete to fill said core and to engage said threaded members and said reinforcing member.
Dependencies are inferred from the claim text.