Garage Beam Sizing

I need a structural beam sized to support ridge rafters for a 22-foot garage renovation. The ceiling will be removed, so it's crucial that the beam is properly sized to ensure safety and stability.

Requirements:
- Use Microlam as the beam material
- Must comply with International Residential Code (IRC)

Ideal Skills and Experience:
- Expertise in structural engineering
- Familiarity with IRC and local building codes
- Experience working with Microlam and engineered wood products

Please provide detailed calculations and ensure the design meets all necessary safety standards.