Description: Vacuum formed plastic

sheet inserted over rebar support layout.

Covered by High-Density Polyethylene

cover and lid. Assembled product

installed 2-3 inches below ground level to

secure rebar.

ANSYS Analysis Summary

Type Load (lbs) Stress (psi) Displacement (in) Cycles (#) Factor of Safety (#) Yield Stress (psi) Ultimate Stress (psi)

Rebar 270 38060 .072 - .083 29600 - 40000 70000

Rebar 120 16930 .032 - .037 ∞ 2.02 40000 70000

Plastic 270 2995 0.198 - - - 4100

P3 Arborloo Plastic Base Development

Special Thanks to:

Rick Auburn Pedro Cruz Kevin Gebo

ME Machine Shop Staff

Jeff Smith - Faro Industries

Purpose

Design a low cost, plastic, portable, easily

constructed, modern looking, and safe to use

arborloo base to be used in rural Haiti.

Function

The arborloo is a simple latrine built over a small pit,

which when filled is then moved to a new pit

location. The old, filled pit then has vegetation

planted on top of it, such as a fruit tree.

Build and Test

John Wilson

Patrick Morabito

Nathan Conklin

Michael Coffey

Samuel Svintozelsky

(ME)

(ME)

(ISE)

(ISE)

(ME)

Faculty Advisors:

Sarah A. Brownell

Dr. Brian Thorn

Vacloo

Deckloo

Selected Design #2 : The Vacloo

Selected Design #1 : The Deckloo

P14415

Results Deckloo Vacloo

Tech

nical Dimensions

36” x 30.8” 18” x 18” (visible

area) Bulk Materials Recycled HDPE HDPE, rebar Support Structure HDPE Runners Rebar Frame Static Load Supported >570 lbs / 2530 N >570 lbs / 2530 N

Planet GHG emissions 13.5 kg 15 kg

Ecopoints 1.59 1.39 End of life Recyclable Recyclable

People

Assembly Time (on-site) None ~3 minutes Weight

22.9 lbs / 102 N 14.5 lbs / 64N

Prosp

erity

Cost (lots of 1000) $40.90 $19.61

Labor costs (aka jobs) $1.38 $0.63

Description: 100% Recycled

High-Density Polyethylene

plastic lumber boards attached

together by cross member

supports. Includes cover

attached by inner tube strips.

Life Cycle Analysis

Von Mises Stresses

(psi) Displacement (in)

ANSYS Analysis of Rebar Layout: 270lbs load ANSYS Analysis of HDPE: 270lbs

load

Von Mises Stresses

(psi)

Displacement (in)

Find out more at: edge.rit.edu/edge/P14415/public/Home

Sponsor:

EPA P3 Award

Engineering Requirements

Vacuum Forming

Static Load Test

rqmt. # Importance Engr. Requirement (metric) Direction Unit of MeasureMarginal

ValueIdeal Value

Deckloo

Test

Results

Vacloo Test

Results

S1 1 Cost in lots of 1000 Minimize $ 100 50 Pass Pass

S8 2

Complexity of tools needed at

use location Minimize

Scale of 1-3 tool

complexity 3 1 Pass Pass

S10 3

Weight of largest

unassembled component Minimize N 392.6 196.2 Pass Pass

S9 4

Weight of largest assembled

component Minimize N 4320 2160 Pass Pass

S2 5 Force supported by base Maximize N >1200 >2000 Pass Pass

S5 6 Static coefficient of friction Target >0.5 >0.6 Pass Pass

Pre-Forming Set up Formed Part Vacloo Mold

Vacloo Exploded View

Deckloo Exploded View

Vacloo Static Loading Deckloo Static Loading

Static Load:

572 lbs.

Deflection:

< .45 in

Vacloo Prototype

Deckloo Prototype

Future Recommendation

Description: 100% plastic

vacuum formed arborloo base.

Modifications:

- Remove rebar

- Add additional rib

structures

Benefits:

- Reduced cost

- Improved strength

- Fewer components

- Faster production

(Pictured Left to Right)

Assembled Vacloo Rebar Welding Fixtures

Deckloo Assembly Fixture

Assembled Deckloo