Author(s)

J. Martinez Apezteguia & J.L. Azkue Arrastoa

Abstract

This paper describes a system developed for the construction of circular ground plan roofs that can be partially opened in their middle section. The system has recently been applied to the project for the roof of an 100.3 m diameter coliseum that is about to be built. This paper goes into the particular solutions that are applied in the project both as regards its structure and the elements that enable the roof to open and close. 1 Introduction Bullfighting is a tradition that is strongly rooted in Spain and has led to the construction of large bullrings. These consist of a round ruedo (sand enclosure) around which terraces are arrayed in rings. Bullring capacities are quite variable, ranging from 3,000 to 25,000 spectators. Almost all cities of over 20,000 inhabitants have bullrings, the

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