Hybrid loader boom arm assembly

A hybrid loader boom arm assembly for a loader work vehicle, the loader boom arm comprising:

• an arm assembly that includes:
• a hollow first beam formed from a lightweight material;
• a hollow second beam formed from the lightweight material;
• a block formed from a second lightweight material, the block having a first block end received within a first end of the first beam and a second block end received within a second end of the second beam, the block configured to couple the first beam to the second beam;
• at least one first steel reinforcing plate coupled to the first beam at the end;
• at least one second steel reinforcing plate coupled to the second beam at the second end;
• and
• at least one connecting plate coupled to the at least one first reinforcing plate and the at least one second reinforcing plate.