1987 Mack CS ROLL-OFF CAVE-IN unitOriginally bought by the Rockville VFD in Montgomery Co.,Maryland in 1988, this rig originally had a single rear axle, but later was changed to a tandem rear to carry greater weight.
Most often carried the cave-in module as shown, IIRC, there was also another module set up for water supply. Now off the RVFD roster, I believe this is still used by the county's Urban Search and Rescue team.
Photo by me at a public display, fall,1992.
Picture added on 16 September 2013 at 01:24
These systems are certainly still a pretty rare sight here, while they are to be found everywhere in many European fire services.
Added by Rob Johnson on 16 September 2013.