| 41. | The firm contributed a lot to the introduction of Prestressed Concrete Structures in Egypt.
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| 42. | Slabs in prestressed concrete are usually produced in lengths of up to 200 meters.
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| 43. | Superstructure of the viaduct consists of prestressed prefabricated girders executed as freely supported beams.
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| 44. | A prestressed box beam or girders bridge was built in Dorrance Township in 1988.
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| 45. | A prestressed box beam bridge was built over the creek in 1963 in Laflin.
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| 46. | He did not invent prestressed concrete, but he did develop it for practical use.
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| 47. | It is a prestressed concrete bridge of 584 m, which rest on 8 columns.
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| 48. | These girders were prestressed by post-tensioning four wire cables embedded in the concrete.
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| 49. | Built in 1964, a prestressed box beam carries Bryn Mawr Avenue over Ithan Creek.
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| 50. | A prestressed box beam or girders bridge carrying Pennsylvania Route 239 was built in 2004.
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