[Update 1.3]
Added:
Hauler Trailer, biggest trailer, requires the most metal to craft, has the most health, has gate slots and full windows (both glass and shutters can be placed)
Changed:
Barricade radius of each trailer to 0.1 (was 0.125), trailers now can be placed one after the other on the same vehicle

Patch
Fixed:
Icon inconsistency between wooden and metal trailers

[Update 1.2]
Removed:
Wooden Trailer
Large Wooden Trailer
Added:
Birch, Maple, Pine trailer variants
Birch HP set to 1800
Maple HP set to 1900
Pine HP set to 2000
Changed:
Wooden trailer placement range to 11 units, metal to 14
Metal trailer HP to 5000
Fixed:
Metal trailer colors (now match vanilla metal structures)
Collision holes in trailer meshes
The mod now uses a masterbundle instead of unity3d files, which has improved load times.
Mod now weighs less
Optimized trailer meshes, increased FPS.
Explosion asset id inconsistency between wooden and metal trailers

Patch
Fixed Trailer_3 material

Patch
Fixed Trailer_2 not taking low-cal damage

1.1 Update
Metal Trailer - 60512

1.0 Release