1. Mechanical Engineering Analysis

2. Material Selection Process WoodStainless Steel HDPEAluminumPTFE Cost0- - --- - Machinability0- --- Strength0+++-+- Durability0+++0++0 Corrosion resistance 0+0++0 Density0- - ---- Total0-41

3. Engineering Assumptions Aluminum 1100 O ν=.33 E=10.1 Msi T=.09 P= 7.5 lb Yield Strength= 20ksi Loading case 1: 2- 1” hinges applied 2in from each end Loading case 2: 1 3/8” wide welded rail holding a total of 1.94 lbs

4. Engineering Analysis Leg analysis – Maximum stress: 455.9psi – Maximum deflection:.00185in in z-direction Rail analysis – Maximum stress: 30.632psi – Maximum deflection:.322X10 -5 in

5. Engineering conclusions The stresses and deflections incurred for both the leg and rail are well below the maximum allowed tolerances for the individual parts. This indicates that the thicknesses assigned and the materials selected fit well with our design. And confirms that the mechanical design is sound.