| 摘要 |
A lumber structural enhancer of unitary, one-piece and integral construction is adapted for use with an axially extending beam of wood, the beam being of substantially rectangular cross-section and having a pair of opposing sides and at least one bight connecting the opposing sides. The enhancer includes an axially extending, thin, substantially planar web of structural metal, and a pair of axially extending folded tubes of structural metal, the tubes being of substantially rectangular cross-section and connected by the web. The web is configured and dimensioned to overlap and abut the beam bight, and each of the tubes is configured and dimensioned to overlap and abut a respective one of the opposing beam sides. The enhancer and the beam of wood are joined together in use, e.g., by nailing, to form a composite combining a high moment of inertia and a low weight per linear foot.
|
