Mobilease: Design and fabrication of an amphibious convertible evacuation bed-chair unit for individuals with mobility challenges/ Michael Joshua Castañeda, Katherine Aliah Katherine De Guzman, Carl Joseph M. Nacua, Jejomar V. Orcine, and Kelvin Gio M. Tulod

Bachelor's thesis

College of Engineering.-- Bachelor of science in mechanical engineering: Technological University of the Philippines, 2025.

Includes bibliographic references and index.

The Philippines ranks among the most disaster-prone countries globally, frequently
experiencing typhoons, floods, and earthquakes. These events pose serious challenges to
individuals with mobility impairments, especially during evacuation. Conventional hospital beds,
due to their size and weight, are not designed for rapid transport in emergencies or disaster
scenarios. This study addresses that gap by designing and fabricating an amphibious, convertible
bed-chair evacuation unit intended for transporting mobility-challenged individuals safely and
efficiently across various terrains. The unit features three functional configurations: Form 1
(Wheelchair) for traversing flat surfaces and stairs; Form 2 (Stretcher) for shallow water and flat
terrain; and Form 3 (Floater) equipped with detachable pontoons for deep water navigation.
Designed to be operated by a single responder, the unit aims to enhance mobility, save space, and
improve emergency response times. It incorporates stair-climbing capability through a tri-wheel
mechanism and is fabricated to match the average anthropometric dimensions of Filipino adults.
Performance tests were conducted to evaluate the unit’s strength, floatability, and dynamic
response under live loads of up to 120 kg. Conversion times between configurations and user-rated
assessments of ergonomics, safety, and usability were also analyzed. Assumptions regarding
operator training, environmental use, and material durability guided the prototype's development.
The results support the hypothesis that the unit can serve as a practical and cost-effective tool in
disaster response, particularly in regions with high flood risks and limited evacuation
infrastructure. By providing a safer and more adaptable transport solution, the study contributes to
enhanced health resilience and inclusivity in emergency preparedness.