| 摘要 |
<p>Supports are linked together by main beams and cross members. Assembly of supports and main beams is by means of a joint which is easily released and comprises a tubular collar with cross members in the shape of a cross. Main beams are linked by secondary beams, the main ones being diagonal to the square shape of the supports and the secondary ones parallel to it. The beams form identical isosceles or right angle triangles in the joint areas, the sides of the right angles being defined by the main beams and the hypotenuses defined by the secondary beams.</p> |
