| Term: | Rattler: Single-axis, horizontal shaker |
| Definition: | University of Texas at Austin earthquake engineering mobile shaker equipment. A horizontal (shear-wave) vibrator that is a 1980 Mertz Model 13-609 mounted on an off-road vehicle. Has a frequency-force response which is nearly identical to T-Rex in the shear mode. Can be used in conjunction with other mobile shaker equipment to create customized testing configurations. |