close up side view of truck while load stack of prestressed concrete slabs for construction

activity automobile beam boom building capacity carriage chassis close concrete construction control crane development diesel equipment erection ground height hydraulic industry lifter lifting load machine machinery maneuverable mobile mover outreach outrigger overhang plate pneumatic poles powerful precast prefabricated prestressed rack radius rope scoop side silhouettes site slabs stack strength structure swinging telescopic truck underframe vehicle view while worker workingplank