9,070 total views
9,070 total views
Plainwater
Civil engineers for a better world
Channel – Riprap Lining
6,793 total views
6,793 total views
Trapezoidal Basin Volume
10,163 total views
10,163 total views
Caltrans AVSF Volumes
5,556 total views
5,556 total views
Sphere
4,523 total views
4,523 total views
HEC-15: Riprap and Gravel Lining Design
Source: HEC-15 Author: RT Kilgore and K Cotton (FHWA) CHAPTER 6: RIPRAP, COBBLE, AND GRAVEL LINING DESIGN Riprap, cobble, and gravel linings are considered permanent flexible linings. They may be described as a non-cohesive layer of stone or rock with a characteristic size, which for the purposes of this manual is the D50. The applicable […]
8,605 total views, 1 views today
Circular Pipe: Manning’s n
Caltrans HDM Table 851.2 Suggested values for Manning’s Roughness coefficient (n) for design purposes are given in the tabe below. Manning “n” Value for Alternative Pipe Materials(1) Type of Conduit Recommended Design Value “n” Value Range Corrugated Metal Pipe(2) (Annular and Helical)(3) 2⅔” x ½” corrugation 0.025 0.022 – 0.027 3″ x 1″ “ 0.028 […]
20,503 total views
Caltrans New Riprap Classes
Source: Caltran Highway Design Manual, Chapter 870 These supersede the previous Caltrans Riprap Sizes. Caltrans requires the use of these new RSP gradations starting August 1st, 2016 in new projects and those not yet at 30 percent PS&E stage. Caltrans Highway Design Manual Table 873.3A RSP Class by Median Particle Size(3) Nominal RSP Class by […]
19,388 total views
