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

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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

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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 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


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

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NO DECIMAL 1/8

INTERPRET GEOMETRIC


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FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 2 OF 15

SIDE FRAME ASSEMBLY


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:12


N/A


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


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

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FRACTIONAL 1/8

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INTERPRET GEOMETRIC


MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 3 OF 15

REAR FRAME ASSEMBLY


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:16


N/A


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


00 CORRUGATED ROOF PANEL 10/31/12

D

C

B

AA

B

C

D

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FRACTIONAL 1/8

NO DECIMAL 1/8

ONE DECIMAL 1/8

INTERPRET GEOMETRIC


MATERIAL

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DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 10 OF 15

CORRUGATED ROOF


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:12


N/A


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


00 BENCH ASSEMBLY 10/31/2012

D

C

B

AA

B

C

D

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FRACTIONAL 1/8

NO DECIMAL 1/8

INTERPRET GEOMETRIC


MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 4 OF 15

BENCH ASSEMBLY


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE 1:12


N/A


18.00

18.00

7.00

9.00

R4.00

R5.00

.06

REVISIONS


00 BENCH TOP PANEL 10/31/12

D

C

B

AA

B

C

D

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Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 5 OF 15

BENCH TOP COVER


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:4


N/A


18

20

1/16 NOMINAL

REVISIONS


00 BENCH SIDE PANEL 10/31/12

D

C

B

AA

B

C

D

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FRACTIONAL 1/8

NO DECIMAL 1/8

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MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 6 OF 15

BENCH SIDE COVER


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:4


N/A


42

12

30

16

1/16 NOMINAL

REVISIONS


00 BENCH FRONT/BACK PANEL 10/31/12

D

C

B

AA

B

C

D

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TOLERANCES:

FRACTIONAL 1/8

NO DECIMAL 1/8

INTERPRET GEOMETRIC


MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 7 OF 15

BENCH FRONT/BACK


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:4


N/A


NOMINAL 5 GALLON BUCKET DIMENSIONS

REVISIONS


00 WASTE CONTROL BUCKET 10/31/12

D

C

B

AA

B

C

D

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FRACTIONAL 1/8

NO DECIMAL 1/8

INTERPRET GEOMETRIC


MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 8 OF 15

WASTE CONTROL BUCKET


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:4


N/A


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


A REBAR FRAME ASSEMBLY 10/31/12

D

C

B

AA

B

C

D

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APPLICATION


TOLERANCES:

FRACTIONAL 1/8

NO DECIMAL 1/8

ONE DECIMAL 1/8

INTERPRET GEOMETRIC


MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 4 OF 15

BENCH TOP COVER


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:8


N/A


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


00 REAR WALL 10/31/12

D

C

B

AA

B

C

D

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TOLERANCES:

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NO DECIMAL 1/8

INTERPRET GEOMETRIC


MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 11 OF 15

REAR WALL


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:12


N/A


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


00 SIDE WALL 10/31/12

D

C

B

AA

B

C

D

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NO DECIMAL 1/8

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MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 12 OF 15

SIDE WALL


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:12


N/A


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


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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MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 9 OF 15

FRAME PIPES


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:1


N/A


PVC PIPE CAP 3/4IN NOMINALREVISIONS


00 PVC PIPE CAP 3/4IN NOMINAL 10/31/12

D

C

B

AA

B

C

D

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NO DECIMAL 1/8

INTERPRET GEOMETRIC


MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 13 OF 15

PVC PIPE CAP 3/4IN


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE2:1


N/A


NOMINAL 3/4IN PVC PIPE T-JOINTREVISIONS


00 3/4IN T-JOINT 10/31/12

D

C

B

AA

B

C

D

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MATERIAL

FINISH

DRAWN

CHECKED

ENG APPR.

MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 14 OF 15

3/4IN PVC T-JOINT


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE1:1


N/A


A A

SECTION A-A SCALE 2 : 1

DIMENSIONS ARE NOMINAL FOR 3/4IN PVC CONNECTORS REVISIONS


00 PVC 90 DEGREE ELBOW CONNECTOR 10/31/12

D

C

B

AA

B

C

D

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FINISH

DRAWN

CHECKED

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MFG APPR.

Q.A.

COMMENTS:

DATENAME

TITLE:

SIZE

BDWG. NO. REV


00

NCM 10/31/12

SHEET 15 OF 15

PVC 90DEG ELBOW


NCM 10/31/12

COLLAPSIBLE SHELTER

SCALE2:1


N/A


Cost Analysis – Collapsible Design

Cost Analysis – Collapsible Design


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


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


design Mother nature 3 1 3

Prevent: indoor testing or endure elements

and test outside Frank

5 Availability of testing facilities –

rain/wind


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