Abstract: A vehicle lift comprises a pair of parallel ramps (2) each of which is pivoted to an upstanding support (1) at one end, wherein the two ramps (2) are connected by a cross-beam (6) located towards the ends distal from the pivots (3) and rigidly secured to the ramps (2), which cross-beam (6) includes a lifting box (7) engageable with a lifting jack (12) and located substantially midway between the two ramps (2) such that lifting forces are directed through the center line of the cross-beam (6). The cross-beam (6) bears against the ground when the ramps (2) are in a downwards position. The jack (12) can be replaced by axle stands (10) when the ramps (2) are elevated.

Abstract: A vehicle lift comprises a pair of parallel ramps (2) each of which is pivoted to an upstanding support (1) at one end, wherein the two ramps (2) are connected by a cross-beam (6) located towards the ends distal from the pivots (3) and rigidly secured to the ramps (2), which cross-beam (6) includes a lifting box (7) engageable with a lifting jack (12) and located substantially midway between the two ramps (2) such that lifting forces are directed through the centre line of the cross-beam (6). The cross-beam (6) bears against the ground when the ramps (2) are in a downwards position. The jack (12) can be replaced by axle stands (10) when the ramps (2) are elevated.

Abstract: A method for mapping sub-surface resistivity contrasts comprising making multi-channel transient electromagnetic (MTEM) measurements using at least one electric source with grounded input current electrodes or one magnetic source with current in a wire loop or multi loop and at least one electric field or magnetic field receiver, measuring the resultant earth response simultaneously at each receiver using a known recording system, measuring the system response by measuring directly the current in the wire at the source using effectively the same recording system, using the measured system response to recover the impulse response of the earth from each measured earth response, and creating from such impulse responses a sub-surface representation of resistivity contrasts.

Abstract: A method for mapping sub-surface resistivity contrasts comprising making multi-channel transient electromagnetic (MTEM) measurements using at least one electric source with grounded input current electrodes or one magnetic source with current in a wire loop or multi loop and at least one electric field or magnetic field receiver, measuring the resultant earth response simultaneously at each receiver using a known recording system, measuring the system response by measuring directly the current in the wire at the source using effectively the same recording system, using the measured system response to recover the impulse response of the earth from each measured earth response, and creating from such impulse responses a sub-surface representation of resistivity contrasts.

Abstract: A covering for an underlying structure comprises a bottom layer of U-shaped sections with gaps between covered by an upper layer of inverted U-shaped sections, the sections having clearance holes and/or flexible edges to permit transverse thermal flexing. The bottom sections are attachable to the structure by clip elements previously attached to the structure.