Effects of Inlet Geometry on Hydraulic Performance of Box Culverts
APPENDIX C. SUMMARY OF REGRESSION COEFFICIENTS
Tables 17, 18, and 19 of this appendix summarize the regression coefficients derived from all of the experiments conducted during this study. Table 17 lists the inlet control design coefficients—K, M, c, and Y—that apply to the HDS-5 form 2 unsubmerged and submerged flow equations in figures 14 and 15 in chapter 3.
Table 18 lists the inlet control fifth-order polynomial constants—a, b, c, d, e, and f—that are used by computer programmers to bridge the transition from unsubmerged to submerged flow by coding the two equations as a continuous function. The full fifth-order polynomial used in culvert design is given in figure 132.
Figure 132. Equation. Fifth-order polynomial.
Ku is the units conversion constant and equals 1.811 for SI units and 1.0 for customary English units.
Table 19 lists the outlet control loss coefficients Ke and Ko used to compute culvert entrance and culvert outlet losses. The coefficients are commonly expressed as functions of the barrel velocity head, as indicated in the equations in figures 19 and 20 in chapter 3.
The downstream channel velocity for this study was taken as the average velocity in the tailbox using the full width of the tailbox multiplied by the average tailwater depth as the flow area.
Table 17. Inlet control design coefficients, all experiments.
| Inlet | Model | Slope (percent) | Fillet (inches) | Barrels | Span: Rise | Skew (degrees) | K | M | c | Y |
|---|
Bevels and fillets experiments |
1.1 |
FC-S-0 |
3.0 |
0 |
1 |
1:1 |
0 |
0.55 |
0.64 |
0.0453 |
0.54 |
1.2 |
FC-S-0 |
3.0 |
6 |
1 |
1:1 |
0 |
0.57 |
0.62 |
0.0448 |
0.56 |
1.3 |
FC-S-0 |
3.0 |
12 |
1 |
1:1 |
0 |
0.58 |
0.61 |
0.0447 |
0.54 |
1.4 |
PC-A |
3.0 |
0 |
1 |
1:1 |
0 |
0.56 |
0.63 |
0.0371 |
0.67 |
1.5 |
PC-A |
3.0 |
6 |
1 |
1:1 |
0 |
0.57 |
0.62 |
0.0371 |
0.67 |
1.6 |
PC-A |
3.0 |
12 |
1 |
1:1 |
0 |
0.57 |
0.61 |
0.0361 |
0.68 |
1.7 |
PC-A |
3.0 |
6 |
1 |
2:1 |
0 |
0.60 |
0.56 |
0.0329 |
0.79 |
1.8 |
PC-A |
3.0 |
12 |
1 |
2:1 |
0 |
0.60 |
0.55 |
0.0316 |
0.81 |
1.9 |
PC-A hybrid |
3.0 |
0 |
1 |
1:1 |
0 |
0.63 |
0.58 |
0.0331 |
0.80 |
1.10 |
FC-S-0 hybrid |
3.0 |
0 |
1 |
1:1 |
0 |
0.62 |
0.59 |
0.0445 |
0.66 |
Multiple barrel experiments |
2.1 |
FC-S-0 |
3.0 |
6 |
1 |
1:1 |
0 |
0.57 |
0.62 |
0.0448 |
0.56 |
2.2 |
FC-S-30 |
3.0 |
6 |
1 |
1:1 |
0 |
0.47 |
0.69 |
0.0394 |
0.53 |
2.3 |
FC-D-0 |
3.0 |
6 |
2 |
1:1 |
0 |
0.55 |
0.61 |
0.0391 |
0.66 |
2.4 |
FC-D-0-E |
3.0 |
6 |
2 |
1:1 |
0 |
0.55 |
0.61 |
0.0394 |
0.65 |
2.5 |
FC-D-30 |
3.0 |
6 |
2 |
1:1 |
0 |
0.47 |
0.66 |
0.0366 |
0.61 |
2.6 |
FC-D-30-E |
3.0 |
6 |
2 |
1:1 |
0 |
0.46 |
0.67 |
0.0381 |
0.59 |
2.7 |
FC-T-0 |
3.0 |
6 |
3 |
1:1 |
0 |
0.58 |
0.58 |
0.0377 |
0.69 |
2.8 |
FC-T-0-E |
3.0 |
6 |
3 |
1:1 |
0 |
0.60 |
0.57 |
0.0405 |
0.67 |
2.9 |
FC-T-30 |
3.0 |
6 |
3 |
1:1 |
0 |
0.48 |
0.67 |
0.0379 |
0.60 |
2.10 |
FC-T-30-E |
3.0 |
6 |
3 |
1:1 |
0 |
0.51 |
0.64 |
0.0405 |
0.60 |
2.11 |
FC-Q-0 |
3.0 |
6 |
4 |
1:1 |
0 |
0.55 |
0.61 |
0.0377 |
0.71 |
2.12 |
FC-Q-0-E |
3.0 |
6 |
4 |
1:1 |
0 |
0.58 |
0.59 |
0.0418 |
0.64 |
2.13 |
FC-Q-30 |
3.0 |
6 |
4 |
1:1 |
0 |
0.47 |
0.71 |
0.0372 |
0.64 |
2.14 |
FC-Q-30-E |
3.0 |
6 |
4 |
1:1 |
0 |
0.50 |
0.65 |
0.0398 |
0.60 |
2.15 |
PC-A |
3.0 |
12 |
1 |
1:1 |
0 |
0.57 |
0.61 |
0.0361 |
0.68 |
2.16 |
PC-B |
3.0 |
12 |
2 |
1:1 |
0 |
0.54 |
0.61 |
0.0253 |
0.91 |
2.17 |
PC-B-E |
3.0 |
12 |
2 |
1:1 |
0 |
0.57 |
0.58 |
0.0315 |
0.81 |
2.18 |
PC-C |
3.0 |
12 |
3 |
1:1 |
0 |
0.57 |
0.57 |
0.0219 |
0.98 |
2.19 |
PC-C-E |
3.0 |
12 |
3 |
1:1 |
0 |
0.59 |
0.58 |
0.0263 |
0.91 |
2.20 |
PC-D |
3.0 |
12 |
4 |
1:1 |
0 |
0.55 |
0.61 |
0.0250 |
0.92 |
2.21 |
PC-D-E |
3.0 |
12 |
4 |
1:1 |
0 |
0.60 |
0.54 |
0.0296 |
0.85 |
Span-to-rise experiments |
3.1 |
FC-S-0 |
3.0 |
0 |
1 |
1:1 |
0 |
0.55 |
0.64 |
0.0453 |
0.54 |
3.2 |
FC-S-0 |
3.0 |
0 |
1 |
2:1 |
0 |
0.61 |
0.56 |
0.0404 |
0.68 |
3.3 |
FC-S-0 |
3.0 |
0 |
1 |
3:1 |
0 |
0.61 |
0.58 |
0.0413 |
0.67 |
3.4 |
FC-S-0 |
3.0 |
0 |
1 |
4:1 |
0 |
0.62 |
0.57 |
0.0421 |
0.65 |
3.5 |
FC-S-30 |
3.0 |
0 |
1 |
1:1 |
0 |
0.44 |
0.74 |
0.0403 |
0.48 |
3.6 |
FC-S-30 |
3.0 |
0 |
1 |
2:1 |
0 |
0.47 |
0.66 |
0.0397 |
0.56 |
3.7 |
FC-S-30 |
3.0 |
0 |
1 |
3:1 |
0 |
0.48 |
0.66 |
0.0414 |
0.54 |
3.8 |
FC-S-30 |
3.0 |
0 |
1 |
4:1 |
0 |
0.50 |
0.63 |
0.0410 |
0.59 |
3.9 |
PC-A |
3.0 |
0 |
1 |
1:1 |
0 |
0.56 |
0.63 |
0.0371 |
0.67 |
3.10 |
PC-A |
3.0 |
0 |
1 |
2:1 |
0 |
0.60 |
0.56 |
0.0329 |
0.79 |
3.11 |
PC-A |
3.0 |
0 |
1 |
3:1 |
0 |
0.60 |
0.58 |
0.0331 |
0.79 |
3.12 |
PC-A |
3.0 |
0 |
1 |
4:1 |
0 |
0.62 |
0.57 |
0.0340 |
0.79 |
Skewed headwall experiments |
4.01 |
FC-T-0 |
3.0 |
6 |
3 |
1:1 |
0 |
0.58 |
0.58 |
0.0377 |
0.69 |
4.02 |
FC-T-30 |
3.0 |
6 |
3 |
1:1 |
0 |
0.48 |
0.67 |
0.0369 |
0.62 |
4.03 |
FC-T-30 |
3.0 |
0 |
3 |
1:1 |
15 |
0.66 |
0.51 |
0.0289 |
0.95 |
4.04 |
FC-T-30 |
3.0 |
0 |
3 |
1:1 |
30 |
0.70 |
0.48 |
0.0312 |
0.94 |
4.05 |
FC-T-30 |
3.0 |
0 |
3 |
1:1 |
45 |
0.69 |
0.50 |
0.0224 |
1.10 |
4.06 |
FC-S-30 |
3.0 |
0 |
1 |
3:1 |
30 |
0.68 |
0.46 |
0.0306 |
0.89 |
Table 18. Inlet control fifth-order polynomial coefficients, all experiments.
| Inlet | Model | Slope (percent) | Fillet (inches) | Barrels | Span: Rise | Skew (degrees) | a | b | c | d | e | f |
|---|
Bevels and fillets experiments |
1.1 |
FC-S-0 |
3.0 |
0 |
1 |
1:1 |
0 |
0.211536 |
0.224341 |
0.208370 |
−0.12199 |
0.024676 |
−0.00161 |
1.2 |
FC-S-0 |
3.0 |
6 |
1 |
1:1 |
0 |
0.224471 |
0.247312 |
0.186514 |
−0.11350 |
0.023189 |
−0.00151 |
1.3 |
FC-S-0 |
3.0 |
12 |
1 |
1:1 |
0 |
0.245464 |
0.218175 |
0.210202 |
−0.12126 |
0.024063 |
−0.00153 |
1.4 |
PC-A |
3.0 |
0 |
1 |
1:1 |
0 |
0.194217 |
0.310678 |
0.109365 |
−0.07741 |
0.016183 |
−0.00106 |
1.5 |
PC-A |
3.0 |
6 |
1 |
1:1 |
0 |
0.203074 |
0.313529 |
0.107677 |
−0.07685 |
0.016046 |
−0.00104 |
1.6 |
PC-A |
3.0 |
12 |
1 |
1:1 |
0 |
0.210576 |
0.314554 |
0.101951 |
−0.07265 |
0.014939 |
−0.00095 |
1.7 |
PC-A |
3.0 |
6 |
1 |
2:1 |
0 |
0.186778 |
0.482282 |
−0.07044 |
−0.00309 |
0.003186 |
−0.00026 |
1.8 |
PC-A |
3.0 |
12 |
1 |
2:1 |
0 |
0.189232 |
0.496842 |
0.090840 |
0.005876 |
0.001525 |
−0.00015 |
1.9 |
PC-A hybrid |
3.0 |
0 |
1 |
1:1 |
0 |
0.240477 |
0.307282 |
0.167334 |
−0.11478 |
0.024511 |
−0.00168 |
1.10 |
FC-S-0 hybrid |
3.0 |
0 |
1 |
1:1 |
0 |
0.324959 |
0.032735 |
0.428664 |
−0.22300 |
0.044585 |
−0.00300 |
Multiple barrel experiments |
2.1 |
FC-S-0 |
3.0 |
6 |
1 |
1:1 |
0 |
0.224471 |
0.247312 |
0.186514 |
−0.11350 |
0.023189 |
−0.00151 |
2.2 |
FC-S-30 |
3.0 |
6 |
1 |
1:1 |
0 |
0.148953 |
0.250437 |
0.129334 |
−0.08043 |
0.016465 |
−0.00106 |
2.3 |
FC-D-0 |
3.0 |
6 |
2 |
1:1 |
0 |
0.154694 |
0.436581 |
−0.03432 |
−0.01750 |
0.006033 |
−0.00044 |
2.4 |
FC-D-0-E |
3.0 |
6 |
2 |
1:1 |
0 |
0.168455 |
0.406534 |
−0.00092 |
−0.03180 |
0.008541 |
−0.00060 |
2.5 |
FC-D-30 |
3.0 |
6 |
2 |
1:1 |
0 |
0.101044 |
0.419241 |
−0.05507 |
−0.00269 |
0.002885 |
−0.00023 |
2.6 |
FC-D-30-E |
3.0 |
6 |
2 |
1:1 |
0 |
0.103678 |
0.402060 |
−0.03596 |
−0.01110 |
0.004465 |
−0.00033 |
2.7 |
FC-T-0 |
3.0 |
6 |
3 |
1:1 |
0 |
0.185570 |
0.425924 |
−0.01513 |
−0.02737 |
0.007816 |
−0.00055 |
2.8 |
FC-T-0-E |
3.0 |
6 |
3 |
1:1 |
0 |
0.220522 |
0.370427 |
0.057110 |
−0.06003 |
0.013803 |
−0.00093 |
2.9 |
FC-T-30 |
3.0 |
6 |
3 |
1:1 |
0 |
0.132482 |
0.340923 |
0.042681 |
−0.04425 |
0.010089 |
−0.00067 |
2.10 |
FC-T-30-E |
3.0 |
6 |
3 |
1:1 |
0 |
0.146450 |
0.369886 |
0.018327 |
−0.03716 |
0.009256 |
−0.00064 |
2.11 |
FC-Q-0 |
3.0 |
6 |
4 |
1:1 |
0 |
0.154223 |
0.448350 |
−0.04069 |
−0.01406 |
0.005238 |
−0.00039 |
2.12 |
FC-Q-0-E |
3.0 |
6 |
4 |
1:1 |
0 |
0.202572 |
0.369396 |
0.056302 |
−0.05916 |
0.013704 |
−0.00093 |
2.13 |
FC-Q-30 |
3.0 |
6 |
4 |
1:1 |
0 |
0.108394 |
0.355482 |
0.027300 |
−0.03433 |
0.007929 |
−0.00052 |
2.14 |
FC-Q-30-E |
3.0 |
6 |
4 |
1:1 |
0 |
0.144926 |
0.350135 |
0.041407 |
−0.04611 |
0.010763 |
−0.00073 |
Table 18. Inlet control fifth-order polynomial coefficients, all experiments. — Continued
| Inlet | Model | Slope (percent) | Fillet (inches) | Barrels | Span: Rise | Skew (degrees) | a | b | c | d | e | f |
|---|
2.15 |
PC-A |
3.0 |
12 |
1 |
1:1 |
0 |
0.210576 |
0.314554 |
0.101951 |
−0.07265 |
0.014939 |
−0.00095 |
2.16 |
PC-B |
3.0 |
12 |
2 |
1:1 |
0 |
0.099284 |
0.607914 |
−0.22159 |
0.066777 |
−0.00985 |
0.000567 |
2.17 |
PC-B-E |
3.0 |
12 |
2 |
1:1 |
0 |
0.149381 |
0.540449 |
−0.14226 |
0.029009 |
−0.00258 |
0.000099 |
2.18 |
PC-C |
3.0 |
12 |
3 |
1:1 |
0 |
0.147326 |
0.545578 |
−0.14618 |
0.032208 |
−0.00349 |
0.000151 |
2.19 |
PC-C-E |
3.0 |
12 |
3 |
1:1 |
0 |
0.153250 |
0.555777 |
−0.15207 |
0.035094 |
−0.00419 |
0.000219 |
2.20 |
PC-D |
3.0 |
12 |
4 |
1:1 |
0 |
0.107009 |
0.600450 |
−0.20745 |
0.060926 |
−0.00892 |
0.000516 |
2.21 |
PC-D-E |
3.0 |
12 |
4 |
1:1 |
0 |
0.158898 |
0.585920 |
−0.19181 |
0.048483 |
−0.00586 |
0.000294 |
Span-to-rise experiments |
3.1 |
FC-S-0 |
3.0 |
0 |
1 |
1:1 |
0 |
0.211536 |
0.224341 |
0.208370 |
−0.12199 |
0.024676 |
−0.00161 |
3.2 |
FC-S-0 |
3.0 |
0 |
1 |
2:1 |
0 |
0.207152 |
0.432143 |
−0.01180 |
−0.03235 |
0.009224 |
−0.00067 |
3.3 |
FC-S-0 |
3.0 |
0 |
1 |
3:1 |
0 |
0.227185 |
0.361402 |
0.077047 |
−0.06998 |
0.015731 |
−0.00106 |
3.4 |
FC-S-0 |
3.0 |
0 |
1 |
4:1 |
0 |
0.246621 |
0.315820 |
0.126140 |
−0.09144 |
0.019626 |
−0.00131 |
3.5 |
FC-S-30 |
3.0 |
0 |
1 |
1:1 |
0 |
0.163450 |
0.127103 |
0.256193 |
−0.13163 |
0.025211 |
−0.00160 |
3.6 |
FC-S-30 |
3.0 |
0 |
1 |
2:1 |
0 |
0.114704 |
0.376884 |
−0.00741 |
−0.02427 |
0.006977 |
−0.00050 |
3.7 |
FC-S-30 |
3.0 |
0 |
1 |
3:1 |
0 |
0.141479 |
0.321334 |
0.064086 |
−0.05613 |
0.012732 |
−0.00086 |
3.8 |
FC-S-30 |
3.0 |
0 |
1 |
4:1 |
0 |
0.23000 |
0.117000 |
0.241000 |
−0.12600 |
0.025000 |
−0.00164 |
3.9 |
PC-A |
3.0 |
0 |
1 |
1:1 |
0 |
0.194217 |
0.310678 |
0.109365 |
−0.07741 |
0.016183 |
−0.00106 |
3.10 |
PC-A |
3.0 |
0 |
1 |
2:1 |
0 |
0.154724 |
0.592825 |
−0.19007 |
0.048610 |
−0.00636 |
0.000370 |
3.11 |
PC-A |
3.0 |
0 |
1 |
3:1 |
0 |
0.200747 |
0.424467 |
0.000339 |
−0.03291 |
0.008306 |
−0.00057 |
3.12 |
PC-A |
3.0 |
0 |
1 |
4:1 |
0 |
0.220017 |
0.404031 |
0.029449 |
−0.04658 |
0.010869 |
−0.00073 |
Skewed headwall experiments |
4.01 |
FC-T-0 |
3.0 |
6 |
3 |
1:1 |
0 |
0.183389 |
0.409080 |
0.005613 |
−0.03583 |
0.009284 |
−0.00065 |
4.02 |
FC-T-30 |
3.0 |
6 |
3 |
1:1 |
0 |
0.128409 |
0.355047 |
0.026694 |
−0.03750 |
0.008897 |
−0.00060 |
4.03 |
FC-T-30 |
3.0 |
0 |
3 |
1:1 |
15 |
0.182031 |
0.686256 |
−0.27704 |
0.082113 |
−0.01167 |
0.000654 |
4.04 |
FC-T-30 |
3.0 |
0 |
3 |
1:1 |
30 |
0.225978 |
0.658427 |
−0.24032 |
0.063449 |
−0.00797 |
0.000409 |
4.05 |
FC-T-30 |
3.0 |
0 |
3 |
1:1 |
45 |
0.187459 |
0.743672 |
−0.32364 |
0.103601 |
−0.01612 |
0.000958 |
4.06 |
FC-S-30 |
3.0 |
0 |
1 |
3:1 |
30 |
0.213123 |
0.685460 |
−0.29816 |
0.088583 |
−0.01224 |
0.000663 |
Table 19. Outlet control design coefficients, all experiments
| Inlet | Model | Slope (percent) | Fillet (inches) | Barrels | Span: Rise | Skew (degrees) | Outlet loss Ko unsubmerged | Outlet loss Kosubmerged | Entrance loss Keunsubmerged | Entrance loss Kesubmerged |
|---|
| Bevels and fillets experiments |
| 1.1 | FC-S-0 | 3.0 | 0 | 1 | 1:1 | 0 | NA | 1.22 | NA | 0.45 |
| 1.2 | FC-S-0 | 3.0 | 6 | 1 | 1:1 | 0 | NA | 1.25 | NA | 0.47 |
| 1.3 | FC-S-0 | 3.0 | 12 | 1 | 1:1 | 0 | NA | 1.17 | NA | 0.64 |
| 1.4 | PC-A | 3.0 | 0 | 1 | 1:1 | 0 | NA | 1.22 | NA | 0.25 |
| 1.5 | PC-A | 3.0 | 6 | 1 | 1:1 | 0 | NA | 1.18 | NA | 0.23 |
| 1.6 | PC-A | 3.0 | 12 | 1 | 1:1 | 0 | NA | 1.19 | NA | 0.30 |
| 1.7 | PC-A | 3.0 | 6 | 1 | 2:1 | 0 | NA | 1.25 | NA | 0.35 |
| 1.8 | PC-A | 3.0 | 12 | 1 | 2:1 | 0 | NA | 0.98 | NA | 0.40 |
| 1.1 | FC-S-0 | 0.7 | 0 | 1 | 1:1 | 0 | 1.03 | 1.17 | 0.73 | 0.46 |
| 1.2 | FC-S-0 | 0.7 | 6 | 1 | 1:1 | 0 | 0.87 | 1.12 | 0.90 | 0.50 |
| 1.3 | FC-S-0 | 0.7 | 12 | 1 | 1:1 | 0 | 1.10 | 1.13 | 0.90 | 0.62 |
| 1.4 | PC-A | 0.7 | 0 | 1 | 1:1 | 0 | 1.07 | 1.19 | 0.67 | 0.27 |
| 1.5 | PC-A | 0.7 | 6 | 1 | 1:1 | 0 | 1.28 | 1.30 | 0.63 | 0.25 |
| 1.6 | PC-A | 0.7 | 12 | 1 | 1:1 | 0 | 1.10 | 1.14 | 0.56 | 0.33 |
| Multiple barrel experiments |
| 2.1 | FC-S-0 | 0.7 | 6 | 1 | 1:1 | 0 | 0.87 | 1.12 | 0.90 | 0.50 |
| 2.2 | FC-S-30 | 0.7 | 6 | 1 | 1:1 | 0 | 1.07 | 1.16 | 0.71 | 0.26 |
| 2.3 | FC-D-0 | 0.7 | 6 | 2 | 1:1 | 0 | 0.84 | 1.07 | 0.71 | 0.52 |
| 2.4 | FC-D-0-E | 0.7 | 6 | 2 | 1:1 | 0 | 0.86 | 1.09 | 0.32 | 0.53 |
| 2.5 | FC-D-30 | 0.7 | 6 | 2 | 1:1 | 0 | 0.76 | 1.03 | 0.74 | 0.34 |
| 2.6 | FC-D-30-E | 0.7 | 6 | 2 | 1:1 | 0 | 0.90 | 1.09 | 0.42 | 0.31 |
| 2.7 | FC-T-0 | 0.7 | 6 | 3 | 1:1 | 0 | 1.00 | 0.91 | 0.60 | 0.54 |
| 2.8 | FC-T-0-E | 0.7 | 6 | 3 | 1:1 | 0 | 0.90 | 0.93 | 0.80 | 0.58 |
| 2.9 | FC-T-30 | 0.7 | 6 | 3 | 1:1 | 0 | 1.00 | 1.05 | 0.48 | 0.31 |
| 2.10 | FC-T-30-E | 0.7 | 6 | 3 | 1:1 | 0 | 1.09 | 1.26 | 0.41 | 0.32 |
| 2.11 | FC-Q-0 | 0.7 | 6 | 4 | 1:1 | 0 | 1.23 | 1.09 | 0.83 | 0.52 |
| 2.12 | FC-Q-0-E | 0.7 | 6 | 4 | 1:1 | 0 | 1.08 | 1.16 | 0.87 | 0.50 |
| 2.13 | FC-Q-30 | 0.7 | 6 | 4 | 1:1 | 0 | 0.86 | 1.08 | 0.38 | 0.32 |
| 2.14 | FC-Q-30-E | 0.7 | 6 | 4 | 1:1 | 0 | 0.89 | 1.05 | 0.38 | 0.34 |
| 2.15 | PC-A | 0.7 | 12 | 1 | 1:1 | 0 | 1.10 | 1.14 | 0.56 | 0.33 |
| 2.16 | PC-B | 0.7 | 12 | 2 | 1:1 | 0 | 0.79 | 1.00 | 0.96 | 0.49 |
| 2.17 | PC-B-E | 0.7 | 12 | 2 | 1:1 | 0 | 0.96 | 1.08 | 0.75 | 0.56 |
| 2.18 | PC-C | 0.7 | 12 | 3 | 1:1 | 0 | 1.01 | 1.25 | 0.94 | 0.54 |
| 2.19 | PC-C-E | 0.7 | 12 | 3 | 1:1 | 0 | 1.21 | 1.14 | 0.96 | 0.51 |
| 2.20 | PC-D | 0.7 | 12 | 4 | 1:1 | 0 | 1.05 | 0.98 | 0.91 | 0.59 |
| 2.21 | PC-D-E | 0.7 | 12 | 4 | 1:1 | 0 | 1.07 | 1.05 | 0.93 | 0.58 |
| Span-to-rise experiments |
| 3.1 | FC-S-0 | 0.7 | 0 | 1 | 1:1 | 0 | 1.03 | 1.17 | 0.73 | 0.46 |
| 3.2 | FC-S-0 | 0.7 | 0 | 1 | 2:1 | 0 | 0.87 | 1.02 | 0.48 | 0.40 |
| 3.3 | FC-S-0 | 0.7 | 0 | 1 | 3:1 | 0 | 1.20 | 1.45 | 0.66 | 0.32 |
| 3.4 | FC-S-0 | 0.7 | 0 | 1 | 4:1 | 0 | 1.07 | 1.16 | 0.62 | 0.40 |
| 3.5 | FC-S-30 | 0.7 | 0 | 1 | 1:1 | 0 | 0.75 | 1.12 | 0.39 | 0.27 |
| 3.6 | FC-S-30 | 0.7 | 0 | 1 | 2:1 | 0 | 0.97 | 1.07 | 0.39 | 0.22 |
| 3.7 | FC-S-30 | 0.7 | 0 | 1 | 3:1 | 0 | 1.49 | 1.27 | 0.48 | 0.19 |
| 3.8 | FC-S-30 | 0.7 | 0 | 1 | 4:1 | 0 | 0.87 | 1.14 | 0.53 | 0.18 |
| 3.9 | PC-A | 0.7 | 0 | 1 | 1:1 | 0 | 1.07 | 1.19 | 0.67 | 0.27 |
| 3.10 | PC-A | 0.7 | 0 | 1 | 2:1 | 0 | 0.92 | 1.09 | 0.42 | 0.34 |
| 3.11 | PC-A | 0.7 | 0 | 1 | 3:1 | 0 | 1.76 | 1.52 | 0.80 | 0.29 |
| 3.12 | PC-A | 0.7 | 0 | 1 | 4:1 | 0 | 0.95 | 1.15 | 0.69 | 0.26 |
| Skewed headwall experiments |
| 4.1 | FC-T-0 | 0.7 | 0 | 1 | 1:1 | 0 | 1.31 | 1.32 | 0.84 | 0.39 |
| 4.2 | FC-T-30 | 0.7 | 0 | 1 | 1:1 | 0 | 0.86 | 0.98 | 0.47 | 0.35 |
| 4.3 | FC-T-30 | 0.7 | 0 | 1 | 1:1 | 15 | 0.88 | 1.13 | 0.86 | 0.47 |
| 4.4 | FC-T-30 | 0.7 | 0 | 1 | 1:1 | 30 | 0.94 | 1.00 | 0.43 | 0.36 |
| 4.5 | FC-T-30 | 0.7 | 0 | 1 | 1:1 | 45 | 0.95 | 0.97 | 0.85 | 0.44 |
| 4.6 | FC-S-30 | 0.7 | 0 | 1 | 1:1 | 30 | 0.84 | 1.03 | 0.90 | 0.46 |
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