Table 1. Measurement data for the 3 arborist blocks used in this study. Refer to Figure 3a for the interpretation of the geometric parameters. Data were recorded in inches or pounds-force (lbf), at the accuracy given by the values in parentheses. | Block | Tread radius mm (in.) | Shaft radius mm (in.) | Sheave weight N (lbf) |
|---|
| BGF | 27.559 (1.0850) | 9.525 (0.375) | 2.2241 (0.5) |
| Hobbs | 52.324 (2.060) | 9.525 (0.375) | 5.8383 (1.3125) |
| Wall | 29.21 (1.150) | 9.3898 (0.370) | 6.3943 (1.4375) |