Asma köprüler geniş açıklıkların aşılmasını sağlayabilirler; ama ciddi bir sakıncaları vardır. Çok esnektirler ve trafik yükü (özellikle yükün açıklığı bir uçtan dörtte bir uzaklığa etkilediği durumlarda) büyük bir çökmeye yol açabilir. Bu yüzden, kablolara yardımcı olması için bir destek kirişi ya da bir kutu kiriş eklenir. Kablo tellerinin hem ucuz, hem de kiriş yapımında kullanılan çelikten daha dayanıklı olması, uzun açıklıklarda asma köprülerin yeğlenmesine neden olur. Orta uzunluktaki açıklıklardaysa, asma köprü yerine kuleleri ve gövdeyi birleştiren dayanakları bulunan kablo-askılı köprü yapılır.
TRENSLATE
A suspension bridge is a type of bridge in which the deck (the load-bearing portion) is hung below suspension cables on vertical suspenders. Outside Tibet and Bhutan, where the first examples of this type of bridge were built in the 15th century, this type of bridge dates from the early 19th century.[3][4] Bridges without vertical suspenders have a long history in many mountainous parts of the world.
This type of bridge has cables suspended between towers, plus vertical suspender cables that carry the weight of the deck below, upon which traffic crosses. This arrangement allows the deck to be level or to arc upward for additional clearance. Like other suspension bridge types, this type often is constructed without falsework.
The suspension cables must be anchored at each end of the bridge, since any load applied to the bridge is transformed into a tension in these main cables. The main cables continue beyond the pillars to deck-level supports, and further continue to connections with anchors in the ground. The roadway is supported by vertical suspender cables or rods, called hangers. In some circumstances, the towers may sit on a bluff or canyon edge where the road may proceed directly to the main span, otherwise the bridge will usually have two smaller spans, running between either pair of pillars and the highway, which may be supported by suspender cables or may use a truss bridge to make this connection. In the latter case there will be
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