41. Built under very difficult conditions, when completed, it became the longest prestressed concrete bridge in the world. 42. Then perhaps I could interest you in a subscription to the Journal of the Prestressed Concrete Institute? 43. He went on to build six prestressed concrete bridges across the Marne River, firmly establishing the technology. 44. The building of a prestressed concrete bridge over the Gambia River has been discussed for many years. 45. Prestressed concrete is crucial to concrete bridge design because it overcomes concrete s natural weakness in tension.46. Lin's pioneering work in simplifying the process for using prestressed concrete inspired modern structural design around the world. 47. It was the first major prestressed concrete beam bridge designed and built in the United States when completed. 48. The roof of the hall was built with curved surfaces made of prestressed concrete and filled with glass. 49. It is currently the longest prestressed concrete bridge in the southern hemisphere, and the sixth longest in the world. 50. Prestressed concrete is a major advancement in concrete engineering and has effectively been used in rigid frame bridge construction.
