Author: Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 60
Book Description
Bridge-deck design, at present, often includes costly bridge-deck drainage provisions. Many bridge engineers have questioned the need for bridge-deck drainage appurtenances, at least to the extent presently included in typical bridge design. This document presents criteria to determine if bridge drainage scuppers and drains are required. A design nomograph allows a rapid decision to be made. A key variable, design rain intensity, is analyzed: the rational method is reviewed and new methods for setting design rain intensity are presented that consider hydroplaning and driver vision. Regardless of the need for scuppers, bridge-end drainage is necessary, and methods are given. If scuppers are needed, this document provides sound drainage design practice for bridge drainage.