| 摘要 |
A member is characterized by an external form, a length, and a boxed cross-section having a substantially uniform shape along the length of the member. The member includes a single joining portion arranged along the length of the member to maintain each of the external form and the boxed cross-section. The member additionally includes two fastening portions, each of the fastening portions arranged proximate to each end of the length, and each fastening portion configured for attachment to one of two substantially parallel rails spaced apart by a distance. The member is configured such that the length is sufficient to span the distance. Additionally, the member is formed out of high-grade steel by a process that enables the use of high-grade steel without employing a re-strike operation to alleviate material spring-back.
|
