P18011: Wheelchair Accessible Restroom 2
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Preliminary Detailed Design

Table of Contents

Team Vision for Preliminary Detailed Design Phase

What did we plan to do during this phase?

We accomplished all planned steps in this phase except completing all calculations. Our team now agrees on a single concept design. Performing the prototyping exercise proved to be quite beneficial in refining our component ideas.

Prototyping, Engineering Analysis, Simulation

Approximate Costs of Handicap Bathrooms

We looked at the different possible costs for implementing a handicap bathroom in the public and private situations. From our research and talking with Chris, it was established that the amount of money spent on private bathrooms varies by disability and many people are willing to spend large amounts in order to guarantee daily comfort. This means that most people are comfortbale with their current private bathroom, but many people still have issues with the public restrooms. For this reason, we are choosing to focus on designing a product which can be marketed to the facilities with public restrooms. Current ADA bathrooms cost around $750 when adding to an existing stall. This gives us a good idea of how much our target market is willing to spend on such a product.

Prototyping Possible Design Options

Prototyping Possible Design Options

Prototyping Possible Complete Design

Prototyping Possible Complete Design

Above are pictures of models that our group created to visualize some of the concepts we are planning on implementing. This helped us to understand how we could combine support rods and a seat lifting mechanism into one final product.

Design Development

Sketches of Transfer Supports on Toilet Seat

Sketches of Transfer Supports on Toilet Seat

Rendering of Sliding Support Bars

Rendering of Sliding Support Bars

Foam Frame Model

Foam Frame Model

Hydraulic Cylinder

Diagram of our proposed Hydraulic Cylinder setup

Diagram of our proposed Hydraulic Cylinder setup

Center of Gravity Model

Center of Gravity Diagram

Center of Gravity Diagram

Bill of Material (BOM)

Preliminary Bill of Materials

Preliminary Bill of Materials

Link to excel version of Bill of Materials

Test Plans

We have decided to complete component testing in the next phase. The different components we will test are:

Our complete test plans can be found here.

Design Review Materials

Attached is our Preliminary Design Review presentation.

Plans for next phase

Below is our plan for the next phase. We have plans to perform component testing on the 5 main subsections: frame, transfer supports, arm rests, seat, and lifting mechanism. Once we finalize our design, we want to place out first material order before the end of MSD 1. 3-week plan


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