Abstract
Siphonic roof drainage systems have been in existence for approximately 30 years, and are becoming an increasingly common element of urban drainage infrastructure. In that time, the construction sectorin most developed countries have been gradually persuaded of the benefits that these systems offer when compared to conventional roof drainage technologies. The work reported herein details anongoing UK government-funded research programme to investigate the performance characteristics of multi-outlet siphonic roof drainage systems. The experimental aims, apparatus and procedures are described, and results are illustrated. In addition, ‘real’ data obtained from three installed siphonic roof drainage systems are discussed. Conclusions are drawn regarding the performance characteristics of multi-outlet systems, and plans for future work are outlined.
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