FIGURE 3.48 Typical Dynaflect deflection bowl deflection basin parameters. WMAX deflection (W1); SCI surface curvature index (numerical difference between sensors 1 and 2); BCI base curvature index (numerical difference between sensors 4 and 5); SPR% spreadability (W/5W1100). Conversion: 1 in 25.4 mm. (From K. Majidzadeh and V. Kumar, Manual of Operation and Use of Dynaflect for Pavement Evaluation, Resource International, Inc., Columbus, Ohio, Report No. FHWA/OH- 83/004, October 1983, with permission)