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Adapting the Gordon Bungalow Staircase Semester Report Introduction Team Leader — Taylor Eichenseer Secondary Facilitator — Rahul Kumar Process Observer — Nicole Lee Conflict Manager — Victor Chiang Timekeeper — Eric Feliciano Client — Ann Gordon (Jenny’s Mother) Location — Bungalow near Croton Problem Statement Context Our client’s daughter Jenny faces a physical disability best described as a moderate case of cerebral palsy. While Jenny can walk with assistance, her weak and irregular limbs cause problems with balance and mobility, and she is often limited to a walker or wheelchair. Ann continually searches for ways to adapt Jenny’s living space in order for Jenny to be able to ambulate independently. However, building a ramp at their elevated bungalow home is impractical because of the hilly terrain, so it remains the constant responsibility of the family to physically support Jenny in traversing the front staircase. Problem Statement Ann proposed a design project that would allow Jenny to ascend and descend the stairs independently and easily. Similar to other low cost, low tech products on the market, our project’s goal is to adapt the existing structure efficiently and safely. By providing a solution that is easily operated, but that also ensures safety and stability, we hope to provide Jenny with a newfound independence and the family with ease of mind. In addition, we seek to protect the aesthetics of the bungalow and to allow others to use the staircase with minimized extra effort. The Staircase The Solution Design Constraints Unique Staircase Corrosion Thermal Expansion Friction Jenny’s Physical Condition Complicated Pulley Technology Design Specifications: Safety It will support a minimum of 130lbs. It must be durable It is designed to operate safely Jenny will be attached to the device by a harness. The system locks in the event that Jenny falls (using Dyna-Lock). Materials such as PVC will be used because of high strength and low weight. Ergonomics It is Designed to be easy and comfortable to use. The handles are oriented such that her hands will rest around her waist. (~43”) Soft foam padding and an adjustable waist strap will aid in comfort. Weight to be around 2.5-3.5 pounds. Functionality Customized Handrails It uses the handrails as a track to slide up and down the stairs with Jenny. It flips up to allow other people to use the steps. Materials such as PVC are used so that it will endure the elements of the outdoors. Ball bearings are used to reduce the friction between the rail and the device. Close Up Of Ball Bearings Flipped Up Materials List Budget is estimated around $500 Material Description Where to Order Price Approximation UV-resistant PVC 5’ total length; maximum 280 psi; Mc-Master-Carr Online $19.37 pipe 2.067" inside diameter Vender UV-resistant PVC Pipe to pipe connection; fits 2” Mc-Master-Carr Online $5.34 cross fitting x2 pipe Vender PVC- pipe stub end To close/encase the open ends of Mc-Master-Carr Online $4.87 x4 PVC pipe Vender Ball Bearings (track Circular arrangement of ball Mc-Master-Carr Online $33.69 rollers) x2 bearings to reduce friction; 2” Vender diameter Dyna-Lock® Self-retracting lanyard that limits eBay; SafetySaves.com $250-$390 free fall distance. Climbing Harness Harness made with polyester and Great Outdoors Depot $29.99 nylon webbing; adjustable to fit waist sizes 20”-42” Design Specifications Handles will be around 43” from the steps, 27.8” apart, and extending 8” The Dyna-lock has a 4.5 ft/sec locking mechanism and a 3/16” steel cable of approx 30’ The staircase is approximately 200.8” A ¾” grove will need to be cut out of the left handrail for the cable Groove for Cable Summary of Major Design Activities No. Task Week Week Week Week Week Week Week Week Week Week 1 2 3 4 5 6 7 8 9 10 1 Assign Team Role 2 Create Preliminary Timetable 3 Client/Organization Research 4 Prepare Interview Questions 5 Client Meeting: Initial Understanding 6 Site Visit and Record Measurements 7 Define Given Project and Goal 8 Create Objective Tree 9 Identify Functional Requirements and Constraints 10 Research Current Products 11 Explore and Brainstorm Initial Design 12 Create Preliminary Sketches of Device 13 Determine Prospective Points of Difficulty 14 Explore Alternative Solutions 15 Data Research 16 Prepare Matlab Statistical Graphs 17 Prepare Midterm Report 18 Practice Midterm Report Presentation (March 07) 19 Client Feedback 20 Make Modifications to Design 21 Advisor Feedback 22 Visit Websites Suggested by Advisor and Client 23 Search for Specific Materials 24 Review Midterm Report/Presentation Comments 25 Review the Video Recording of the Presentation 26 Set Out New Goals and Notify Client 27 Ask Final Questions to Client and Advisor 28 Visit the Mechanical Engineering Lab 29 Incorporate Ball Bearings into Existing Design 30 Research Materials 31 Finalize Constructing Adjustable Handles 32 Conclude Detailed Design for Pulley System 33 Finalize Devising Steel Ball Bearings 34 Individually Work on Maya 35 Compile Maya Rendering 36 Individually Work on Final Report 37 Compile Final Report and Presentation 38 Prepare for Final Report: Deliverables 39 Practice Alternate Solutions Final Deliverable Maya model Final report List of building materials and dimensions Community/Transition Plan Where the product is at now Final Report Maya Model Materials List and Dimensions Things needed to be done by the client Buy Materials Fabrication and Installation Safety Test Things that could be done by future teams Explore alternate solutions: High Tech Meet with Jenny to discover other needs Team Process Comments If our team was to work on another project together, we feel that we would better understand the team process, and after working together for a semester, we understand the interpersonal factors more deeply. In the beginning part of the semester, the team simply lacked the extra push that would have made our midterm presentation more effective. This entails both examining the details and understanding the project as a whole. If given an opportunity to work together in the future, the team would be able to take a step back in order to examine itself from an outside perspective that gets lost when one is consumed in the process of design. Thank You Ann Gordon and Jenny Gordon Jose Sanchez Questions?
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