| 摘要 |
A steel girder of the type having a cross-section in the shape of a rectangle comprises four parallel L-beams situated at respective corners of the rectangle, strut elements disposed opposite one another in pairs and parallel to the longer sides of the rectangle, and connecting elements each having a flat, substantially H-shaped web portion and two flanges projecting at right angles from the outer edges of the web portion, the web portions sloping at a uniform angle to the L-beams toward the shorter sides of the rectangle.
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