Load-Bearing Wall Modification

I need structural calculations to safely create a standard-sized doorway (80 inches by 36 inches) in a load-bearing wooden wall.

Requirements:
- Expertise in structural engineering
- Experience with load-bearing wall modifications
- Knowledge of building codes and safety regulations

Ideal Skills:
- Structural engineering degree
- Proven experience with wood load-bearing structures
- Certification in structural calculations

Please provide detailed calculations and ensure compliance with local codes.