Design a Durable Portable Ramp

I need a portable ramp designed for elderly access in public places and home uses . The ramp should be lightweight yet durable, made of carbon material or stainless steel for its lightweightness.

Key Requirements:
- Portable, self collapsable and easy to set up
- Suitable for public places and home uses.
- Made of carbon material or stainless steel
- Lightweight yet durable
- Non-slip surface for safety

Ideal Skills and Experience:
- Experience in designing mobility aids
- Knowledge of materials, particularly carbon and stainless steel
- Ability to create lightweight yet sturdy structures
- Understanding of safety regulations for public access equipment

Please provide examples of similar work done.