| 摘要 |
PCT No. PCT/GB94/00947 Sec. 371 Date Dec. 15, 1995 Sec. 102(e) Date Dec. 15, 1995 PCT Filed May 3, 1994 PCT Pub. No. WO94/25682 PCT Pub. Date Nov. 10, 1994A bridge including a metal tubular space frame enclosed in a housing shell made principally from fibre reinforced plastics material which is maintenance free and protects the frame from corrosion. The upper surface of the housing shell forms a vehicular platform. The lower surface of the housing shell is of a curved aerodynamic shape and forms a load bearing access and maintenance platform. The space frame may include pre-stressing cables running alongside or inside elongate members of the space frame. |
