| 摘要 |
Concrete girder comprising, anchored into the concrete of the girder (1), on both sides and equidistant from its central longitudinal plane, tabs (2) arranged edgeways to said plane, having an out-of-girder length approximately equal to the maximum camber of the girders (1) and ending in a sleeve (3) in which nails (4) may slide perpendicularly to said central longitudinal plane, the distance from the tabs (2) to the axis of the girder (1) being of the order of 2 to 3 cm. <IMAGE>
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