The present invention is directed to thermo-expandable microspheres and to the expanded microballoons, microcellular foam or foamed composite material that results upon heating the microspheres. Methods of diagnosing Alzheimer’s disease by detection of these RNAs are also provided. When the boom structure and the jib boom are in their stowed positions, the personnel basket is positioned closely adjacent the jib boom at one side thereof so as to be within the highway width restrictions.