Puente Verrazano-Narrows

- Ammann Ammann,- Whitney Whitney

doi:10.3989/ic.1964.v17.i160.4554

Abstract

This outstanding suspension bridge underwent a long process of preparation, and it has finally served to solve a most urgent and intense problem of communication between Brooking and Staten Island. This bridge represents an exceptional engineering achievement firstly because of the 1,298 m span between its two towers, and the two side spans of 370 m; secondly due to the vast amounts of materials involved in its construction. The suspended deck will have two directions of traffic, each consisting of six lanes, the two directions separated by a central division. The anchorage and foundations reach down to a depth of 50 m. The towers supporting the main suspension cables are 210 m high above the mean sea level. Their prefabricated external metal shell contain inside a complex system of thousands of metal cells. The deck hangs from four main suspension cables, each 90 cm in diameter. Hanger cables, each 55 cm in diameter, support the deck. The cable spinning over the main towers was a difficult and highly complicated operation. Details of this are given in the accompanying diagrams. Simultaneous with the construction of the bridge, the main access roads to it have been improved and altered, in order to chanalise the heavy traffic more effectively towards it. The whole project, including the construction of the bridge and alterations to the approaches, has amounted to a total cost of the order of 400 million dollars. The safety of the personnel working on this project has been very carefully studied. Ellaborate arrangements are being rigidly enforced for the protection of human lives. It is hoped that this huge project will be completed within the present year.

Highlights

Esta destacada obra, suspendida, realizada por la Triborough Bridge and Tunnel Authority, cuenta con una larga gestación que por fin culminó en u n a realidad y, con ella, a dar solución a u n a angustiosa situación que el tráfico rodado venía creando progresivamente con sus innumerables embotellamientos
P a r a la formación del cable sobre las propias torres de apoyo h a sido necesario instalar u n a verdadera trefilería, de la cual se acompaña un esquema elocuente por sí mismo
Dieses aussergewohnliche Vorhaben, das von der Triborough Bridge and Tunnel Authority durchgefiihrt wird, wurde lange geplant und soil endlich einer Situation ein Ende bereiten, die durch den standing ansteigenden Verkehr und seine unzahligen Verstopfungen geradezu beângstigenden geworden war

Summary

Introduction

Suspendida, realizada por la Triborough Bridge and Tunnel Authority, cuenta con una larga gestación que por fin culminó en u n a realidad y, con ella, a dar solución a u n a angustiosa situación que el tráfico rodado venía creando progresivamente con sus innumerables embotellamientos. El proyecto de esta tremenda obra de ingeniería ha sido redactado por los ingenieros consultores Ammann & Whitney, de Nueva York, bajo los auspicios de la Triborough Bridge and Tunnel Authority y la inspección del Director General, George E.

Results

Conclusion