Additional hydraulic tests were conducted on three grate inlet designs identified as bicycle safe, hydraulically efficient and having good debris handling characteristics. The grates were selected based on the results of a previous study - Bicycle-safe Grate Inlets Study - Volume I Hydraulic and Safety Characteristics of Selected Grate Inlets on Continuous Grades. The major objective of the initial study was to identify, develop, and analyze selected grate inlets which maximize hydraulic efficiency and bicycle safety. Full size grates in sizes of 3.0 ft by 4.0 ft (0.91 m by 1.22 m), 3.0 ft by 2.0 ft (0.91 m by 0.61 m), 1.25 ft by 2.67 ft (0.38 m by 0.81 m), and 1.25 ft by 2.0 ft (0.38 m by 0.61 m) were tested at cross slopes of 1:48, 1:24, and 1:16 and longitudinal slopes of 0.5, 1.0, 2.0, 4.0, 6.0, 9.0, and 13 percent with gutter flows up to 5.6 ft 3/s (0.159 m 3/s). Numerous design curves are provided to aid the hydraulic design engineers with grate inlet selection.
Bicycle-Safe Grate Inlets Study. Volume 2. Hydraulic Characteristics of Three Selected Grate Inlets on Continuous Grades
1978
158 pages
Report
No indication
English
Highway Engineering , Transportation Safety , Roads , Drains , Bicycles , Traffic safety , Hydraulics , Tests , Runoff , Drainage , Fluid mechanics , Safety
Bicycle-safe grate inlets study
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