扶强材（stiffener）亦称“防挠材”，是为保证金属板的刚性所加装的钢质船体结构材料。船内、舱壁、肋板等常用型钢作扶强材。所有横舱壁均为带垂直扶强材的平面舱壁，所有纵舱壁为带水平扶强材或垂直扶强材的平面舱壁。外壁板带垂直扶强材，内壁板为带垂直扶强材。扶强材的偏差可使用直尺检查，直尺垂直于扶强材，扶强材根部处内壳与直尺间的最大间隙建议为 4mm。
平板围壁应该使用垂直扶强材和水平桁加强并且提供有扶手的步行平台。
The flat steel plate wall shall be strengthened by the vertical stiffeners and horizontal webs, and provided with walking platform with handrails.
本文根据开口薄壁杆件稳定性的一般理论导出了舱壁扶强材的侧向稳定性方程序。
Basing upon the general buckling theory of bars with thin-walled open sections, the lateral buckling equation of bulkhead stiffeners is derived in this paper.
厨房，卫生间、供应品间和一些必要规范上要求的处所，应该是设有扶强材的钢质舱壁或者在适当间隔处安装绝缘舱壁。
Galley, sanitary spaces, provision spaces, and spaces where required by rules shall be of steel bulkheads with stiffeners or insulation bulkhead at suitable intervals.
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