The Collaborative International Dictionary of English v.0.48:

hook-and-ladder company \hook"-and-lad"der com"pa*ny\, n.
   A company of firefighters who operate a hook-and-ladder
   truck; a fire company; called also ladder company.
   [PJC] hook and ladder truck
   hook-and-ladder truck

The Collaborative International Dictionary of English v.0.48:

ladder company \ladder company\, ladder truck \ladder truck\n.
   Same as hook-and-ladder company, hook-and-ladder truck.
   [PJC]