| 摘要 |
<p>The steel girder for concrete shuttering is formed of an outer girder and a telescopic girder. The outer girder consists of two identical spaced apart from one another and joined together by connecting plates situated on their back surface. The inner girder rests on the free part of the front surface of the connecting plates. The back surfaces of the two pieces making up the outer girder and the connecting plates are situated on the same plane. The outer and inner girder have, near their ends, bearings with axes parallel to the back surfaces of the girders and at right angles to the main, lengthwise median places of the outer and inner girders.</p> |
