Project P13414: Portable, Multi-Use, Single Person Shelter
Transcript of Project P13414: Portable, Multi-Use, Single Person Shelter
Project P13414:
Portable, Multi-Use, Single Person Shelter
…also know as….the arborloo!
Agenda
Detailed Design Review Objectives
Project Overview
Washtub Design
Collapsible Design
Bucket/Chute Component
Test Plans
Risk Assessment
Project Plan
Team Members
Betsy Khol, ISE (Project Manager)
Nate Mott, ME (Lead Engineer)
Diego Guinea, ISE
Frank Worczak, ME
Jason Yang, ME
Detailed Design Review Objectives
From this review, the team hopes to:
Identify any items that have been overlooked and need to be
considered before moving forward with building
Get recommendations of suppliers of inexpensive materials
Receive input on test plans
Problem Statement
The primary objective of this project is to design
and develop an affordable, element-resistant,
portable arborloo that leverages both local and
manufactured materials. The shelter should be
constructed in such a way that it is easy to move,
and disassemble or repair after a hurricane. In
addition, the team is aiming to produce a structure
that Haitians will want to own.
Project Objectives
1. Low cost structure (costs less than $50 for Haitians to
purchase)
2. Base design that safely covers an 18-20 inch diameter, 3-4
feet deep pit
3. Can be easily constructed with simple hand tools
4. Has a modern aesthetic that encourages Haitians to invest
in better sanitation
5. Has a modular design
6. Element and pest resistant
7. Portable
Design Overview
Tent Shelter Design Collapsible Design
Tent Shelter Design Overview
This solution contains:
Washtub
PVC Frame
Cloth covering
Tent Shelter Design Assembly Drawings
Looking for feedback on:
Difficulties assembling
Overlooked formatting issues
Completeness & thoroughness of assembly package
Part Weight BOM
SUBASSEMBLY ITEM NUMBER ITEM ITEM WEIGHT* QNTY. COMBINED WEIGHT*
1 1.1 POST 3.05 2 19
1.2 LINTEL 1.36 1 1.36
1.3 JACK STUD 0.24 2 0.48
1.4 BENT RAFTER 3.88 2 7.76
1.5 90 DEG ELBOW JOINT 0.25 2 0.5
1.6 T-JOINT 0.23 2 0.46
1.7 90 DEG TRI-JOINT 0.25 1 0.25
2 2.1 WASHTUB 5.5 1 5.5
2.2 REBAR SUPPORT 0.76 2 1.52
3 3.1 COVER TOP 4.2 1 4.2
3.2 COVER WALL 7.1 2 14.2
3.3 DOOR SHROUD 1.85 1 1.85
* WEIGHT IN LBS TOTAL 57.08
STRUCTURE WEIGHT -BY PART
Feasibility Analysis Overview
In order to insure proper function of the design, and that
important customer needs are met, the following were
considered:
Member Sizing
Wind loading
Tipping Considerations
Member Sizing
In previous products, schedule 40 PVC pipe has been
successfully implemented as a frame material.
¾ inch material has been used.
Due to shape, 1 inch material is utilized here to incorporate
added stiffness.
Prototyping will reveal if additional bracing is required.
Wind Loading
The structure will be implemented outdoors.
Must withstand highly dynamic wind loading daily.
Standard for Building Wind Loading:
BS – 6399 – Wind code
Derivation follows guides of Part 2.
Wind Loading Calculations:
Assumptions:
11 mph constant wind speed.
Sea level air density (ρ = .07648 lb/ft^3).
Rigid single-wall analysis. 𝐴𝑤𝑎𝑙𝑙 = 24.5 𝑓𝑡2
Orthogonal wind direction.
*First it is necessary to calculate the pressure of the wind on the wall (From pressure we are able
to arrive at the force)
𝑃𝑒𝑥𝑡𝑤𝑖𝑛𝑑 𝑠𝑖𝑑𝑒= 𝑞𝑠 ∗ 𝐶𝑃𝑒 ∗ 𝐶𝑎 …. [f.]
Where:
𝑞𝑠 = 𝑑𝑦𝑛𝑎𝑚𝑖𝑐 𝑝𝑟𝑒𝑠𝑠𝑢𝑟𝑒
𝐶𝑃𝑒 = 𝑒𝑥𝑡𝑒𝑟𝑛𝑎𝑙 𝑝𝑟𝑒𝑠𝑠𝑢𝑟𝑒 𝑐𝑜𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑡
𝐶𝑎 = 𝑠𝑖𝑧𝑒 𝑓𝑎𝑐𝑡𝑜𝑟 𝑓𝑜𝑟 𝑒𝑥𝑡𝑒𝑟𝑛𝑎𝑙 𝑝𝑟𝑒𝑠𝑠𝑢𝑟𝑒
* So we must first determine 𝑞𝑠 , 𝐶𝑃𝑒 , 𝑎𝑛𝑑 𝐶𝑎….. [1.]
Finding 𝐶𝑃𝑒 , [External Pressure Coefficient]….
From Table 5 [Appendix A] Windward face 𝐶𝑃𝑒 ≈ +.8 (𝑓𝑜𝑟 𝐷
𝐻≤ 1)
Finding 𝐶𝑎 [Size factor for external pressure]….. [2.]
From Figure 4 [Appendix A.]…
If 𝐻𝑒 = 6 − 15 𝑓𝑡 (effective height) we will use line “B”.
Diagonal dimension “a” = 7.83 ft.
So…. 𝐶𝑎 ≅ 1 [Interpolating from Figure 4; Appendix A]
* Finding 𝑞𝑠 [dynamic pressure]….. [3.]
From Bernoulli’s 𝑞𝑠 = 1
2∗ 𝜌𝑎𝑖𝑟 ∗ 𝑣𝑤𝑖𝑛𝑑
2
𝑞𝑠 = 1
2∗
. 07648 𝑙𝑏𝑓𝑡3
32.2 ∗ [ 11
𝑚𝑖
ℎ𝑟
5280 𝑓𝑡
1 𝑚𝑖
1 ℎ𝑟
3600 𝑠𝑒𝑐
2
]
𝑞𝑠 = .309 𝑙𝑏/𝑓𝑡^3 = .0021 𝑝𝑠𝑖
* Now we can substitute the results of [1.],[2.],[3.] into [f.]………….
𝑃𝑒𝑥𝑡 = 𝑞𝑠 ∗ 𝐶𝑃𝑒 ∗ 𝐶𝑎 𝑃𝑒𝑥𝑡 = . 0021𝑝𝑠𝑖 . 8 1 𝑃𝑒𝑥𝑡 = .0017 𝑝𝑠𝑖
* From 𝑃𝑒𝑥𝑡 we can find the force, “𝐹𝑤𝑖𝑛𝑑 ", acting on one wall…..
𝑃 = 𝐹
𝐴 𝐹𝑤𝑖𝑛𝑑 = 𝑃𝑒𝑥𝑡 ∗ 𝐴𝑤𝑎𝑙𝑙 𝐹𝑤𝑖𝑛𝑑 = . 0017 𝑝𝑠𝑖 [24.5 𝑓𝑡2(
144 𝑖𝑛2
1𝑓𝑡 2)]
𝐹𝑤𝑖𝑛𝑑 = 6.1 𝑙𝑏𝑓
**This is the wind force experienced by one wall of a structure meeting the initial
geometry conditions as defined prior to this point. Using this procedure, theoretical wind loads
can be realized for a range of wind speeds. -- This is done in a separate report. Actual wind load
will vary from these worst case conditions, due to elevation (air density) changes as well as
porosity of the wall and deflections yielding non orthogonal wind vectors.
Wind-Load Calculations
Assume: (ft) (in)
L = 7 84
H = 6.5 78
Awall = 45.5 6552
rho = 0.07648 lb/ft^3
Cpe = 0.8
Ca = 1
Find qs: Find Pext: Find Fwind:
Ve (mph)
11 qs = 0.31 lb/ft^2 Pext = 0.0017 psi Fwind = 11.25 lbf
16 0.65 0.0036 23.80
21 1.13 0.0063 41.01
26 1.73 0.0096 62.86
31 2.45 0.0136 89.36
36 3.31 0.0184 120.51
41 4.29 0.0239 156.31
46 5.41 0.0300 196.76
51 6.64 0.0369 241.86
56 8.01 0.0445 291.61
61 9.51 0.0528 346.01
66 11.13 0.0618 405.06
71 12.88 0.0715 468.75
76 14.76 0.0820 537.10
81 16.76 0.0931 610.09
86 18.89 0.1050 687.74
91 21.15 0.1175 770.03
96 23.54 0.1308 856.98
101 26.06 0.1448 948.57
106 28.70 0.1595 1044.81
111 31.48 0.1749 1145.70
116 34.37 0.1910 1251.24
121 37.40 0.2078 1361.44
126 40.56 0.2253 1476.28
131 43.84 0.2436 1595.76
136 47.25 0.2625 1719.90
141 50.79 0.2822 1848.69
0.00
200.00
400.00
600.00
800.00
1000.00
1200.00
1400.00
1600.00
1800.00
2000.00
0 20 40 60 80 100 120 140 160W
ind
Load
(lbf
)
Wind Speed (mph)
Wind Loading
Sand Bag Weight Justification
Sand bags will be used to resist the induced Tipping Moment
due to wind loading.
The sizing of these is important; must consider:
-Minimize Fabric (Costs)
-Limit weight portability
-Maximize acceptable wind speed.
Tipping Considerations:
[Sand Bag Weight Justification]
**Wind loading will cause a racking and tipping moment on the structure. The structure will be
anchored into the ground by the posts. This will provide some tipping resistance but will
primarily function to positively locate the structure and combat shifting due to normal use.
Sand bags will be employed to resist the tipping moment produced by the wind. The
weight of sand in these bags will provide the required combatting reaction force needed to
balance the tipping moment.
The weight needed will facilitate the amount of additional fabric needed to construct the
sand bags from, by driving the volume needed, and thus for a given bottom perimeter length, the
required tube diameter of the sand bags.
Assumptions:
-Wind will act on the largest exposed face.
-The face is slightly curved over one half of its length but will be analyzed as entirely flat.
-Triangular fabric created by the 6 degree roof slope is negligible on the overall area.
-The tipping moment will be a due to a resulting wind force, 𝐹𝑤𝑖𝑛𝑑 , where the magnitude will be
the result of the wind load pressure acting over the entire sidewall area. (Figure 1.)
-The weight of the entire tent structure, 𝑊𝑇𝑒𝑛𝑡 , without considering the effect of the washtub
seat, or the needed sand, is 60 lbs. (Figure 1.)
-The wind will act in the negative “x” direction (Figure 1.)
- The structure will be assumed rigid, (free of rack), allowing all of 𝐹𝑤𝑖𝑛𝑑 to contribute to the
tipping moment, 𝑀𝑡𝑖𝑝 .
Figure 1.
L = 84 in
H = 78 in
T = 36
“L”
Summary of Page
==============================
Assumptions for Calculations:
-Wind acts on largest face (side of
structure).
-Tipping moment due to wind force.
-Wind blows right to left.
-Energy transfer due to racking is
neglected (effectively creates worst case
scenario)
Summary of Page
=================================================================
-Tipping will be dependent on Moment induced by the Wind load
-Wind Load moment will be countered by the moment the weight of the structure creates
With respect to the left leg.
-Weight of structure is the summation of the structure weight, and the sand bag weight
**Since the wind will be assumed to act in the –x direction (right to left across the page) we will
examine the effects of moments with respect to the left leg of the structure, point “L” (Figure 1.)
In order to determine if the structure is at risk for tipping, given the assumptions made, the
resulting moment at “L” , 𝑀𝐿, must be less than or equal to 𝑀𝑡𝑖𝑝 .
From 𝑀𝐿, we will be able to derive the appropriate weight of sand needed to accomplish
our goal for various wind loads. These calculations are carried out and summarized on the
second sheet of the spreadsheet titled, “Wind Loading Calculations”.
** This will effectively drive the size of the sand bags.
𝑀𝑤𝑖𝑛𝑑 𝐹𝑤𝑖𝑛𝑑 ∗𝐻
2
𝑀𝑤𝑒𝑖𝑔ℎ𝑡 𝑊 ∗𝑇
2
𝑀𝑤𝑖𝑛𝑑 ≤ 𝑀𝑤𝑒𝑖𝑔ℎ𝑡
In order to avoid a tip over, the
following must be true:
“L”
**From the previous, We can determine what we are really interested in, the
Sand bag diameter, and thus how much additional fabric we will need….
Sand Bag Calculations
Important Values Wind Speed (MPH) F_wind Moment Due to Wind (in*lb) Minimum Sand-Weight (lb) With a Factor of Safety of 1.1 Required Diameter of Sand Tube (in)
ɤ_sand 11 6.06 lbf 236.28 13.13 14.44 1.27
115 lbf/ft^3 16 12.82 499.90 27.77 30.55 1.84
21 22.08 861.16 47.84 52.63 2.42
length of tube 26 33.85 1320.06 73.34 80.67 3.00
172 in 31 48.12 1876.59 104.25 114.68 3.57
14.33 ft 36 64.89 2530.76 140.60 154.66 4.15
41 84.17 3282.56 182.36 200.60 4.72
height of structure 46 105.95 4132.01 229.56 252.51 5.30
78 in 51 130.23 5079.09 282.17 310.39 5.88
56 157.02 6123.81 340.21 374.23 6.45
Width of Structure 61 186.31 7266.16 403.68 444.04 7.03
36 in 66 218.11 8506.16 472.56 519.82 7.60
71 252.40 9843.79 546.88 601.56 8.18
*These values reflect a continual sustained wind speed, realistically wind blows in gusts.
**It will be recommended that the structure be disassembled in winds exceeding 40-50 mph. [structure should be taken down for all major storms.]
This is limited by the weight of the sand assuming two people would attempt to move the tubes without emptying the contents prior.
𝑊𝑠𝑎𝑛𝑑 ɤ𝑠𝑎𝑛𝑑 ∗ 𝑉𝑠𝑎𝑛𝑑 𝑊𝑠𝑎𝑛𝑑 ɤ𝑠𝑎𝑛𝑑 ∗ 𝜋
4∗ 𝐷𝑡𝑢𝑏𝑒
2 ∗ 𝐿𝑡𝑢𝑏𝑒)
Rearranging so we can assess values for the tube diameter…..
𝐷𝑡𝑢𝑏𝑒 = 4∗𝑊𝑠𝑎𝑛𝑑
𝜋∗ɤ𝑠𝑎𝑛𝑑∗𝐿𝑡𝑢𝑏𝑒
**So for approx.. 155 lbs. of sand, we
will need a tube diameter of just over 4
inches.
Cost Analysis – Tent Shelter Design
TOTAL COST = 68.58 USD
Collapsible Assembly
Designed to collapse intentionally when there is a storm
forecasted
Lowering structure in harsh conditions will limit the amount
of wear experienced by the shelter
Collapsible Structure
Folded vs. Unfolded
6
3
1
5
4
27
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 FULL COLLAPSIBLE ASSEMBLY 10/31/12
ITEM NO. PART NUMBER DESCRIPTION QTY.
1 GROUND SAMPLE GROUND 1
2 BACK COLLAPSIBLE INCLUDES ROOF 1
3 COLLAPSIBLE SIDE WALL 2
4 COLLAPSIBLE SIDE WALL 2
5 BENCH ASSEMBLY 1
6 BACK WALL COLLAPSIBLE 1
7 PIPE CAP 2
D
C
B
AA
B
C
D
12345678
8 7 6 5 4 3 2 1
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
MSD PROJECT TEAM P13414. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 1 OF 15
FULL ASSEMBLY
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:30
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
Overview – PVC Side Frame Structure
Frame to be constructed of ¾” PVC pipes
Design proven in Sarah Brownell’s Haitian structure
To be held to the ground with U-clamps and ground stakes.
2
5
4
3
1
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
A SIDE FRAME ASSEMBLY - 2 PER UNIT 10/31/12
ITEM NO. PART NUMBER DESCRIPTION QTY.1 90 ELBOW For 3/4in piping 3
2 PIPES 10in Topper 1
3 PIPES 64in Vertical Member 2
4 PIPES 40in Horizontal Member 2
5 3_4IN TEE 1 D
C
B
AA
B
C
D
12345678
8 7 6 5 4 3 2 1
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
MSD PROJECT TEAM P13414. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 2 OF 15
SIDE FRAME ASSEMBLY
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:12
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
Overview – Rear Frame and Roof
Rear frame also made of ¾” PVC piping
Roof composed of corrugated steel
Roof has curtain rod attachment for a door for the structure
Front of roof slotted to secure side walls
6
3
5
4
1
2
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 REAR FRAME ASSEMBLY 10/31/12
ITEM NO. PART NUMBER DESCRIPTION QTY.1 PIPES 38IN Rear Bottom Pipe 2
2 PIPES 64in Vertical Member 23 PIPES 40in Roof Support 1
4 90 ELBOW For 3/4in piping 4
5 3_4IN TEE 16 CORRUGATED SHEET For Roofing 1
D
C
B
AA
B
C
D
12345678
8 7 6 5 4 3 2 1
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
MSD PROJECT TEAM P13414. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 3 OF 15
REAR FRAME ASSEMBLY
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:16
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
48.0
48.0
B
1/8 IN NOMINAL
3.4
1.8
45.8
1/2IN REBAR NOM.
R.53
2.4
.8
3.6
1.5 DETAIL B
SCALE 1 : 6
DIMENSIONS SYMMETRIC
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 CORRUGATED ROOF PANEL 10/31/12
D
C
B
AA
B
C
D
12345678
8 7 6 5 4 3 2 1
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
MSD PROJECT TEAM P13414. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
ONE DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 10 OF 15
CORRUGATED ROOF
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:12
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
Overview – Bench
Must support user over waste hole
Frame built from ½” rebar
Wrapped in fabric to control odor
Covered in corrugated plastic to encapsulate structure
Uses bucket with retractable bottom design for odor control
Toilet seat mount on frame
5
4
2
?
3
ITEM NO. PART NUMBER DESCRIPTION QTY.
1 Bench Frame 1
2 Bucket 1
3 Side Panel 2
4 Front_Back Panel 2
5 BENCH TOP 1
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 BENCH ASSEMBLY 10/31/2012
D
C
B
AA
B
C
D
12345678
8 7 6 5 4 3 2 1
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
MSD PROJECT TEAM P13414. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 4 OF 15
BENCH ASSEMBLY
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE 1:12
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
18.00
18.00
7.00
9.00
R4.00
R5.00
.06
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 BENCH TOP PANEL 10/31/12
D
C
B
AA
B
C
D
12345678
8 7 6 5 4 3 2 1
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
MSD PROJECT TEAM P13414. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 5 OF 15
BENCH TOP COVER
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:4
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
18
20
1/16 NOMINAL
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 BENCH SIDE PANEL 10/31/12
D
C
B
AA
B
C
D
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PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 6 OF 15
BENCH SIDE COVER
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:4
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
42
12
30
16
1/16 NOMINAL
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 BENCH FRONT/BACK PANEL 10/31/12
D
C
B
AA
B
C
D
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PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 7 OF 15
BENCH FRONT/BACK
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:4
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
NOMINAL 5 GALLON BUCKET DIMENSIONS
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 WASTE CONTROL BUCKET 10/31/12
D
C
B
AA
B
C
D
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PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 8 OF 15
WASTE CONTROL BUCKET
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:4
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
Frame Analysis
Must ensure bench frame can support maximum specified
weight of 2,000N
Used SolidWorks Simulation to illustrate displacements with
carbon steel material properties
No points of failure in simulation
42.0
9.0
12.1
29.9
33.0
12.0
16.0
16.5
16.3
3.0
15.0 18.0
9.0
12.0
14.5
15.0
27.0
27.5
30.0
33.0
17.8
24.8
17.2 18.3
DIAMETERS ARE NOMINAL OF 1/2IN REBAR
TOTAL NEEDED - 372IN
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
A REBAR FRAME ASSEMBLY 10/31/12
D
C
B
AA
B
C
D
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PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
ONE DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 4 OF 15
BENCH TOP COVER
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:8
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
Vertical Displacements
Horizontal Displacements
Overall Displacements
Overview – Shelter Walls
Exploring two options – corrugated material and fabric
Fabric will have pouch hemmed on for a sand anchor weight
Corrugated material held on with tie material
64
40
WALL MADE OF RIGID MATERIAL
WALL MADE OFFABRIC W/ CYLINDER SEWN INFOR SAND WEIGHTS
DIMENSIONS WILL CHANGE FOR FABRIC WALLS TO ACCOUNT FOR HEM
INCREASE WIDTH TO 43.5IN
INCREASE HEIGHT TO 79 IN
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 REAR WALL 10/31/12
D
C
B
AA
B
C
D
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PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 11 OF 15
REAR WALL
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:12
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
64
42
WALL MADE OF RIGID MATERIAL
WALL MADE OFFABRIC W/ CYLINDER SEWN INFOR SAND WEIGHTS
DIMENSIONS WILL CHANGE FOR FABRIC WALLS TO ACCOUNT FOR HEM
INCREASE WIDTH TO 45.5IN
INCREASE HEIGHT TO 79IN
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 SIDE WALL 10/31/12
D
C
B
AA
B
C
D
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MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 12 OF 15
SIDE WALL
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:12
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
Wind Analysis - Collapsible
0.00
100.00
200.00
300.00
400.00
500.00
600.00
700.00
800.00
900.00
0 20 40 60 80 100 120 140 160
Win
d L
oad
(lb
f)
Wind Speed (mph)
Wind Loading
Wind Analysis Ve (mph) qs = Pext = Fwind =
11 0.31 lb/ft^2 0.0017 psi 5.19 lbf
16 0.65 0.0036 10.99
21 1.13 0.0063 18.93
26 1.73 0.0096 29.01
31 2.45 0.0136 41.24
36 3.31 0.0184 55.62
41 4.29 0.0239 72.14
46 5.41 0.0300 90.81
51 6.64 0.0369 111.63
56 8.01 0.0445 134.59
61 9.51 0.0528 159.70
66 11.13 0.0618 186.95
71 12.88 0.0715 216.35
76 14.76 0.0820 247.89
81 16.76 0.0931 281.58
86 18.89 0.1050 317.42
91 21.15 0.1175 355.40
96 23.54 0.1308 395.53
101 26.06 0.1448 437.80
106 28.70 0.1595 482.22
111 31.48 0.1749 528.79
116 34.37 0.1910 577.50
121 37.40 0.2078 628.35
126 40.56 0.2253 681.36
131 43.84 0.2436 736.51
136 47.25 0.2625 793.80
141 50.79 0.2822 853.24
Sand Recommendations
Wind Speed (MPH) F_wind lbf
Moment Due to Wind (in*lb)
Minimum Sand-Weight (lb)
With a Factor of Safety of 1.5
Required Diameter of Sand Tube (in.)
11 5.19 lbf 186.95 8.90 13.35 1.22
26 29.01 1044.44 49.74 74.60 2.88
31 41.24 1484.77 70.70 106.06 3.43
36 55.62 2002.36 95.35 143.03 3.99
126 681.36 24528.88 1168.04 1752.06 13.96
131 736.51 26514.24 1262.58 1893.87 14.51
It is recommended to collapse the shelter when expecting winds in access of 35mph
SEE TABLE
DIAMETERS ARE FOR 3/4IN PVC NOMINAL
REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 PVC PIPING 10/31/12
CONFIGURATION LENGTH
VERTICAL MEMBER 64 IN
SIDE CROSS MEMBER 40 IN
REAR CROSS MEMBER 38 IN
TOPPER 10 IN
D
C
B
AA
B
C
D
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MSD PROJECT TEAM P13414 IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 9 OF 15
FRAME PIPES
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:1
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
PVC PIPE CAP 3/4IN NOMINALREVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 PVC PIPE CAP 3/4IN NOMINAL 10/31/12
D
C
B
AA
B
C
D
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PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
APPLICATION
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 13 OF 15
PVC PIPE CAP 3/4IN
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE2:1
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
NOMINAL 3/4IN PVC PIPE T-JOINTREVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 3/4IN T-JOINT 10/31/12
D
C
B
AA
B
C
D
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PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
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DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 14 OF 15
3/4IN PVC T-JOINT
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE1:1
SEE PARTS LIST[SHEET 1]
N/A
ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
A A
SECTION A-A SCALE 2 : 1
DIMENSIONS ARE NOMINAL FOR 3/4IN PVC CONNECTORS REVISIONS
ZONE REV. DESCRIPTION DATE APPROVED
00 PVC 90 DEGREE ELBOW CONNECTOR 10/31/12
D
C
B
AA
B
C
D
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PROPRIETARY AND CONFIDENTIAL
NEXT ASSY USED ON
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DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL 1/8
NO DECIMAL 1/8
INTERPRET GEOMETRIC
TOLERANCING PER: N/A
MATERIAL
FINISH
DRAWN
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ENG APPR.
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Q.A.
COMMENTS:
DATENAME
TITLE:
SIZE
BDWG. NO. REV
UNLESS OTHERWISE SPECIFIED:
00
NCM 10/31/12
SHEET 15 OF 15
PVC 90DEG ELBOW
DO NOT SCALE DRAWING
NCM 10/31/12
COLLAPSIBLE SHELTER
SCALE2:1
SEE PARTS LIST[SHEET 1]
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ALL PARTS NOT POSSESSING A DIMENSIONED DRAWINGARE PURCHASED ITEMS;FOR DETAILS, CONSULT BILL OF MATERIALS
Cost Analysis – Collapsible Design
Cost Analysis – Collapsible Design
TOTAL COST = 92.09 USD
W/O BENCH = 68.67 USD
Bucket Assembly
Purpose:
Pit Coverage
Inhibits Pest
Odor Control
Interchangeable between
designs
Bucket Assembly
Odor Control:
No Vent, No Odor Control
Ground Integrated Ventilation
Containing Odor
Bucket Assembly
Containing Odor
Odor is contained within pit
Lid is closed when unused
Lid Opens when Seat/Platform
is down
Bucket Assembly
Use of a Bucket Design
Common product
Simple to assemble
Stand alone assembly
(interchangeable)
Light weight
Easy to clean
Bucket Assembly
Item # Part Number Description
1 BUCKET BASE SECTIONED TYP. 5 GAL. BUCKET (HDPE)
2 BOTTOM LID SECTIONED TYP. 5 GAL. BUCKET (HDPE)
3 HINGE ASSEMBLY STEEL – ZINC FINISH
4 TOP COVER **REPLACED BY SEAT/PLATFORM
5 COUNTER WEIGHT
ARM
STEEL MENDING PLATE – ZINC PLATED
6 INNER ARM BENT REBAR
Bucket Assembly
Bucket Base
Bucket Assembly
Bottom Lid
Bucket Assembly
Inner Arm
- Bent rebar (19
inches)
Bucket Assembly
Other Materials:
Screws #6-32
Hinge
Counter Weight Arm (Mounting plate)
Bucket Assembly
Fully Assembled
Bottom lid attached by
Hinge
Counter weight attached
on lid
Inner Sleeve rests on lid
(closed position)
Full View
Sectioned View
Bucket Assembly
Force analysis
𝐹𝑙𝑖𝑑 𝐹𝐻,𝑆 𝐹𝑅,𝑆𝑡
5.19 in
0.92 in
0.70 in
𝐹𝑐𝑤
2 in
𝐹𝑙𝑖𝑑 0.21 𝑙𝑏𝑠
𝐹𝐻𝑖𝑛𝑔𝑒,𝑆𝑐𝑟𝑒𝑤𝑠 0.03 𝑙𝑏𝑠
𝐹𝑅𝑒𝑏𝑎𝑟,𝑆𝑒𝑎𝑡 2.59 𝑙𝑏𝑠 -Assumed Seat = 2lbs
𝑇𝑜𝑡𝑎𝑙 𝑚𝑜𝑚𝑒𝑛𝑡 𝑜𝑛 𝑃𝑖𝑛 𝑐𝑜𝑛𝑛𝑒𝑐𝑡𝑖𝑜𝑛: 𝑇𝑙𝑖𝑑 5.19𝐹𝑙𝑖𝑑
𝑇𝐻,𝑆 0.92𝐹𝐻,𝑆
𝑇𝑅,𝑆𝑡 0.70𝐹𝑅,𝑆𝑡
𝑇𝑡𝑜𝑡𝑎𝑙 𝑇𝑙𝑖𝑑 𝑇𝐻,𝑆 𝑇𝑅,𝑆𝑡 2.94 𝑙𝑏𝑠 ∙ 𝑖𝑛
𝑇𝑡𝑜𝑡𝑎𝑙 𝑇𝑐𝑤 2𝐹𝑐𝑤
∴ 𝐹𝑐𝑤 1.47 𝑙𝑏𝑠 𝑚𝑖𝑛. 𝐹𝑜𝑟𝑐𝑒 Counter weight Force:
3.5 lbs
Cost Analysis - Bucket
TOTAL COST = 7.69 USD
Test Plans
Wind Testing
UV Testing
Humidity Testing in the Environmental Chamber Lab
Heat Stress Testing
Wind Tunnel Testing On Structures
ISO Standard – 4354 – 2009, Annex H for wind tunnels
Applies to scale models
The scale of the wind must be similar to the scale of the
model (within a factor of 2)
Use measurements made during test to determine wind
coefficients, should match calculated
UV Light Exposure Considerations
Longevity of the structure is an important factor.
Fabric suppliers guarantee fabric against sun for time
intervals.
Exposure testing is still desirable to shed light on the validity
of these claims.
UV Light Exposure Test Outline
Suggestions to aid in the
avoidance of ambiguity of
testing parameters and
metrics for qualitative
results are encouraged at
this point.
UV light Test Plan Overview:
Purpose:
Although not crucial to the overall success or failure of the project, and not explicitly
specified as a customer need, the cloth shelter covering will be frequently, and for long
durations, subjected to intense sunlight. Since the durability of the shelter as a whole would be
compromised if the cover fails, it is therefore prudent to test for as many environmental factors
as possible with respect to the effect they have on the condition of our materials. For this reason,
a test will be conducted on the chosen fabric(s) ability to resist degradation due to ultraviolet
light exposure.
Test Plan Structure:
A series of samples will be prepared and exposed to ultraviolet light, comparable in
magnitude to data found at the latitude which Haiti is located. (18.9411° N)
Samples will be of a uniform size.
A control group will be created with identical dimensions and sample number, and will
be placed in a dark container for the duration of the test, only being allowed light exposure when
periodic observations are made for all sample groups throughout the test, as well as any ‘leaked’
light, due to container-light-porosity, or gaps between the containment vessel and its lid.
Test will be carried out for a period of 8 weeks, to insure ample exposure time.
Recordable Data:
-Test will be a qualitative comparison of the effects of the UV light on the fabric.
-Traits such as color, surface texture, cut resistance, and specimen deformation will be
observed and recorded for comparison with the control group specimens’ state.
-Predictions will be made relative to the control group’s condition, for the overall
condition (based upon examination parameters) for a 5 year exposure period.
Hurdles:
- Procuring UV intensity data for latitude location 18.9411° N.
- Allocating lab work space for a long term test to be conducted.
- Obtaining sample material. (must consult budget to insure proper funding)
Humidity Testing
The Environmental Chamber Lab is part of Packaging
Science in CAST
Capable of recreating any atmospheric temperature and
humidity
Can accommodate up to two, large pallets and expose those
pallets to all of the extremes the Earth has to offer
Will be used to test the polyester fabric chosen to ensure
durability in heat and humidity as well as mildew resistance
Visiting the lab after the design review today
Heat Stress Testing
Warm average temperature of Haiti
83oF on average in the capital, Port-Au-Prince
The covering of the shelter, both color and material will play a crucial
role in regulating the shelter’s inside temperature
Customer specifications indicate the maximum difference between the
inside temperature and the ambient temperature should not exceed
39.2oF
Use ISO Standard 7243 “Hot environments – Estimation of the heat
stress on working man, based on the WBGT-index (wet bulb globe
temperature)” to carry out the test
Use a heat stress meters to measure the temperature inside the shelter
Calculates WBGT inside and outside
Matching Specs to Test Plans Specification Marginal Value Ideal Value Test Plan
Cost in lots of 1000 $ 100.00 $ 50.00 Cost estimate
Cost of most expensive
component $ 30.00 $ 20.00 Cost estimate
Force supported by floor over
hole in the ground>1200 N >2000 N Truss Analysis on washtub and bench
Minimum torque required to
begin tipping1200 Nm 2200 Nm
Anchoring justification with sandbags
Tipping moment write-up
OR Static coefficient of friction >0.5 >0.6 Not applicable with dirt floor
Weight of largest assembled
piece to move during
relocation
4320 N 2160 NSandbag calculation
Anthropometric analysis in 3DSSPP
Wind speeds
withstood/accommodated
(estimated)
>75 mph >115 mphWind Loading Derivation
Wind testing
Minimum lifespan of a
component (estimate)1 yr 3 yrs UV testing
Cost of most expensive
replacement part with a
lifespan <3 years
<$10.00 <$5.00 Cost estimate
Maximum mass of each
individual component before
assembly on site
200 kg 40 kg Weight BOM
Maximum inside temperature
above ambient in direct
sunlight (4 hours with minimal
wind)
7oC 4oC Heat stress testing
Resists rain ? 4? Environmental Chamber Lab testing
Light available during daytime 50 lux 100 lux Fabric design/windows
Light available at night 0 lux 20 lux Fabric design/windows
Minimize odor Bucket design
Number of people required to
install3 2 Anthropometric analysis
Selection Criteria Template Washtub Design Collapsible Design
Performance during UV
testing
Performance in the
Environmental Chamber Lab
Performance during wind
testing
Performance during heat
stress testing
Cost of structure
Aesthetic preference by end
users
Feedback from test sample
Updated Risk Assessment
I
D Risk Item Effect Cause Lik
eli
ho
od
Sev
eri
ty
Imp
ort
anc
e
Action to Minimize Risk Owner
Describe the risk briefly
What is the effect on any or
all of the project deliverables
if the cause actually happens?
What are the possible
cause(s) of this risk? L*S
What action(s) will you take (and by when) to
prevent, reduce the impact of, or transfer the
risk of this occurring?
Who is
responsible for
following
through on
mitigation?
1 Cost minimization could cause
safety concerns
Go over budget; cause
redesign Low budget 3 3 9
Reduce: at least 5 suppliers investigated;
design for 95%ile male weight; design for 1.5
factor of safety on all structural members
Betsy
2 Components only available
internationally
Delays project; causes
redesign; unable to complete
project
Cost/budget restricts
material choices 2 3 6
Prevent: source/research locally available
materials
Reduce: order materials early
Diego
3 Availability of testing facilities –
temperature testing
Delays project; uncertainty in
design
Mother nature; lab
availability 3 1 3
Prevent: schedule lab time
Accept: utilize simulated results Frank
4
Availability of testing facilities –
repeated usability and
functionality
Delays project; uncertainty in
design Mother nature 3 1 3
Prevent: indoor testing or endure elements
and test outside Frank
5 Availability of testing facilities –
rain/wind
Delays project; uncertainty in
design
Mother nature; lab
availability 3 1 3
Prevent: schedule lab time
Accept: utilize simulated results Jason
6 Loss of team member Increase workload for other
members; delay project
Personal issues; loss of
motivation; excessive
workload
1 3 3
Reduce: keep public access to all files and
constantly update status (EDGE site/ email);
keep high team morale
Nate
Updated Risk Assessment
I
D Risk Item Effect Cause Lik
eli
ho
od
Sev
eri
ty
Imp
ort
anc
e Action to Minimize Risk Owner
7 Structural integrity of concrete
for base
Delays project; causes
redesign
Concrete supplement
affects material properties 1 2 2
Utilize other materials/have other material
options Nate
8 Ability to make each unit cost less
than $50
Go over budget; cause
redesign Low budget 2 1 2
Investigate multiple suppliers; make more
components modular than originally planned Diego
9 Budget and time allotted to make
a prototype and finished product
Go over budget; final product
not as intended
Low budget; time
constraints 1 2 2
Update project plan weekly to keep on track;
know lead time of parts to ensure we can get
as many as needed on time.
Betsy
10 Procuring UV lamps and lab
space for long term testing
Insufficient testing; poor
validation Unavailable lab space 1 2 2 Contact labs before break Frank
11 Supplier availability of design
components
Delays prototyping; re-
analysis of design with new
accommodated materials;
choose different supplier
Supplier fault (inventory
issues) 1 1 1
Prevent: spec multiplier suppliers and
material configurations
Reduce: order materials early
Nate
12 Safety of structure given the
variability of terrain
Unsafe product for user
testing
Unknown terrain in final
destination 1 1 1
Design structure to be stable on any terrain
(use sand pockets to cover PVC and stakes
where necessary)
Frank
Preliminary Plan for MSD-II Item Timeframe
Close any remaining action items Week 1
Purchase Supplies Week 1
User Instructions Week 1
Finalize Test Plan for Shelter and Covering Week 2
Cut in parts in Machine Shop or outsource Week 2
Final Test Plans Week 2
Construct Subassemblies Week 3
Testing Analysis Week 4
Technical Documents Week 4
System Integration Week 5
Poster Week 6
Identify additional areas for improvement Week 7
Submit Paper Week 8
Project Review Presentation Week 9
Backup
Anthropometric Measurements
Popliteal Height Overhead Reach
50%ile male = 17.05 inches
50%ile female = 15.32 inches 5%ile female = 75.47 inches
Fabric Option
Solution Dyed Polyester from Top Value Fabrics
6.35/yard for red
Polyurethane coated and water repellent
Used for a variety of outdoor applications, most notably in
the marine industry due to its inherent UV and mildew
resistance
Rugged urethane coated polyester fabric is easy to clean and
features abrasion resistance
http://www.topvaluefabrics.com/solution-dyed-polyester.html
Fabric Option
14 oz. Vinyl Coated Polyester from Top Value Fabrics
$2.85 per yard for red or royal blue
Mildew and UV resistant
Heat sealable PVC fabric that eliminates the need for thread
or fabric tape
Used to manufacture various types of tarps, industrial and
athletic field covers
http://www.topvaluefabrics.com/14oz-VCP.html
Fabric Option
10.10 Army Duck from Big Duck Canvas
$5.25 per yard for standard canvas color (cream)
Marine Finish (mildew and water repellant)
Multi-purpose canvas that is very strong and resistant to
tearing
http://www.bigduckcanvas.com/categories/army-duck.html