 Only in a single case , between arches 26 and 27 , were Wurster and Ganzert able to determine the breadth of a pier : 2 @.@ 10 m ( 6 @.@ 9 ft ) . Subtracting this value from the common arch span of 12 @.@ 75 m ( 41 @.@ 8 ft ) , a clear span of 10 @.@ 65 m ( 34 @.@ 9 ft ) remains . Since all arches have a rise of ca . 2 m ( 6 @.@ 6 ft ) , the Limyra Bridge has an unusually large span @-@ to @-@ rise ratio of 5 @.@ 3 to 1 . Such flattened arches were very rare at the time for stone bridges , and were not matched and surpassed until the reappearance of segmental arch bridges in 14th century Italy . For the largest arch in the Limyra Bridge , the ratio is even greater , spanning a width 6 @.@ 4 times its height . The two later arches , in contrast , are , with a ratio of 2 @.@ 7 : 1 , quite ordinary semi @-@ circular arches . 
