| 摘要 |
PURPOSE: A steel boxed lining board is provided to achieve superior endurance and low production cost because the lining board upper part and the web member are integrated. CONSTITUTION: A steel boxed lining board comprises a lining board upper part(10), a web member(20), and a concrete member(30). The lining board upper part is formed by pressing or roll forming to have left and right protrusions and a central protrusion. The web member is provided under the lining board upper part and supports the lining board upper part. The web member has a supporting part formed by bending so that the top of the supporting part supports the lining board upper part. The concrete member is placed in grooves formed by the left and right protrusions the central protrusion of the lining board upper part. |
