Modern Composite Deck & Screen Porch Design

I'm looking for engineer approved detailed cross-sections for a modern-style screen porch and deck, featuring a gas log fireplace. The deck should be done using composite materials.

Requirements:
- Modern design aesthetics
- Use of composite materials
- Inclusion of gas log fireplace

Ideal Skills and Experience:
- Expertise in modern outdoor structures
- Proficiency in composite material design
- Experience with outdoor fireplaces and integrated features