Erklärung: cantilevered slab made of reinforced concrete
See http://www.engineering-timelines.com/scripts/engineeringItem...
"The central arch measures 58ft across and rises to a height of 24ft above mean water level. The two outer spans are each 50ft wide. The roadway as built was 20ft wide. In 1963 it was widened by adding 2ft and 4ft 6in-wide footpaths, using a ***cantilevered, reinforced concrete slab*** extending 5ft 6in on either side of the original bridge."
Steffen Walter Deutschland Spezialgebiet Muttersprache: Deutsch PRO-Punkte in Kategorie: 480