Glossary › M

Main frame: The two longitudinal members of a chassis.
Major inspection test: Annual test for trailers from 10 tonne total weight.
Marbled finish: Overlapping ring pattern surface finish of aluminium or stainless steel tanks for aesthetic reasons.
Marker lights: Compulsory lights used to illuminate the top corners and lower contours of vehicles.
Meat hooks: Hooks fitted to the roof of refrigerated vehicles for transporting hanging meat.
Meat transport construction: Body construction fitted out to transport hanging meat e.g. roof track with meat hooks and watertight floor.
Mechanical suspension: Term for trailer suspension comprising several layers of steel springs.
Modular construction: A popular manufacturing method using prefabricated common components that can be easily adapted to suit individual specifications.
Moving bulkhead: Found in e.g. semi-trailers for transporting stone whereby a mechanically or hydraulically operated bulkhead wall is used to secure the load.
Mud flaps: Hang down behind mudguards and prevent spraying of surface water onto following vehicles.