8/6/2019 Transportable Homeless Shelter

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Transportable Homeless ShelterUp to 100 million people are homeless throughout the world, themajority of them women and dependent children, according to Dr. WallyN'Dow of United Nation.

There are up to 100 rough sleepers in Auckland city and an estimated

300-400 people living without permanent or secure housing.

A lack of affordable housing has been a primary reason for

homelessness for the last two decades.

Government Agencies and communities have assisted homeless people

with other basic survival needs except a proper shelter.

B. DESIGN SPECIFICATIONS

1) Box Bed 2) Retractable Bed

C. RESEARCH

Material Quantity

Canvas 2 meters

Water Proof

Board

2 sheets (2.4

m x 1.2 m)

Foam

Mattress

2 m x 0.8m

Velcro 2 meters

Zip 2 meters

Press Button 100

Caster Wheels 4

Steel Square

Section

20 meters 10

m 30x30mm

10m

25x 25mm)

Round Tube 2meters

Locking Pins 2

Material Quantity

Canvas 4 meters

Water Proof

Board

2 sheets (2.4 m x

1.2 m)

Woven Belt 4 straps (2 meters

in all)

Velcro 2 meters

Zip 2 meters

Press Button 100

Wheels 2

Aluminium

Square Section

10 meters

(30mm x 30mm)

(25mmx25mm)

Round Tube 1.5 meters

Hinge 1

Locking Pins 6

Problem StatementA durable design for a, compact and movable shelter for the homeless.

Box Bed Cardboard Shelter

D. CONCEPTS

G. BILIOGRAPHY1. http://cubeme.com/blog/2010/03/25/homeless-shelter-by-paul-elkins/

2. http://www.aucklandcity.govt.nz/auckland/introduction/safer/home

3. http://www.ehow.com/about_4596170_interesting-facts-homeless-

people.html#ixzz1K1eQ6yAe

4. http://www.civilcraftstructures.com/civil-subjects/shear-force-and-

bending-moment-as-structural-basics/

5. http://blimeyhottea.blogspot.com/

Rishi Dharamraj & Karan S Grewal

A. BRIEF HISTORY

Retractable Bed

The final design is a compactable, retractable transportable bed. Its

light weight, easy to transport. By releasing the locking pins one can

extend the bed to its full length. It includes two movable and two fixed

woven straps along its length to support the weight of a persons body.

A removable canvas sheet is fastened to the stretcher bed which forms a

waterproof cover over the person.Favorable points:

1. RetractableThis makes it easy to transport such as a travel

luggage bag.

2. Its simplicity to assembleBy releasing six locking pins one can

extend the bed to its full size. No special tools are required for the

assembly.

3. Less complicated to manufactureThere are less intricate

components.

4. Its cost efficientAs compared to the box bed concept as it uses

less material in the design of its frame.

5. Light weightDue to its simple design its weight has dramatically

reduced which makes it simple to transport in confined, narrow

areas.

Its construction is simple and could easily be mass produced. Its light

weight and rigid structure allows versatility in its handling of one

person. The advantages of the retractable bed features a desirable

concept of a Transportable Homeless Shelter.

The design is suitable and meets the problem statement.

The shear force diagram indicates the shear

force withstood by the beam section along the

length of the beam.

E. CALCULATIONSThe shearing force (SF) at any section of a beam represents the

tendency for the portion of the beam on one side of the section

to slide or shear laterally relative to the other portion.

The bending moment diagram indicates the bending moment

withstood by the beam section along the length of the beam.

The bending moment at any point along the beam is equal to

the area under the shear force diagram up to that point.

The bending moment is the sum of the product of each force

and its distance of x from the section either left or right.

Distributed loads are calculated buy summing the product of

the total force (to the left of the section) and the x distance of

the distributed load centroid.

Calculation to determine the reactions:

Mc = 0 (taking clockwise as +ve at point C)

(Ra x L)(W x L/2) = 0

So, Ra = W/2 [in kN]

Fy= 0 (taking vertical as +ve)

Ra + RcW = 0

W/2 + RcW = 0

So, Rc = W/2 [in kN]

Homeless people have been using card board boxes as a

makeshift shelter for many years. It has major advantages anddisadvantages:

ADVANTAGES

1. Cardboard is very cheap.

2. At times its even free.

3. Its versatile, meaning it can be bent and shaped.

4. Its not rigid so can easily be knocked down.

5. Its disposable and recyclable.

6. Its transportable.

Availability of cardboard makes it the most sought after

homeless shelter. It can be replaced at any time as it is easily

available.

DISADVANTAGES

1. Not weather resistant.

2. Collapsible.

3. Starts perishing after some time.

4. Fixings are not permanent.

5. Requires multiple pieces to be able to construct a suitableshelter.

6. Difficult to transport due to its bulkiness when erected.

Once the cardboard is discarded it becomes litter and is an eye

sore to the public. The litter is also unhealthy for general

environment. The risk of a fire hazard is increased by the

cardboard inflammability. The cardboard does not offer proper

support for a person sleeping on the floor.

The idea of a box bed involves a compactable combination of a

bed and a trolley. Due to its versatility and simplicity in its

assembly, it is one of the concepts thought for the idea of a

transportable homeless shelter. Its rigidity and durability offers a

prolong use of a shelter for the homeless.

The Box Bed is extendable to

provide proper support for a person during their time of rest.

The process of extension involves a very simple action of the

removal of two locking pins. To cover the exterior of the frame

we have used water proof board. The canvas sheet is used to

cover the top. There are four wheels for easy transport.

When the box bed is not in use the owner can use it as a trolley

to cart his belongings.

Due to its manufactured cost the box bed can be revised which

lead to the final design concept.

People are constantly coming up with

different ideas in regards to building a

shelter for homeless, to continue this

trend we decided to design not only a

homeless shelter but a transportable

homeless shelter.

The basic requirement for a homeless

shelter needs to be rigid, durable and

weather resistant as it would be used in

harsh environment. It also needs to

provide the basic sleeping

comfortability.

The image on the right handside is of a movable homeless

shelter which is very bulky thus

difficult for transportation. It

has poor access ability to many

places. It is restricted to its

terrain as its heavy and difficult

for one person to carry.

Due to its bulkiness and size it

has to be left unattended when

the owner is strolling in malls,

etc.

But the concept of having a transportable shelter is quite ideal relative

to its compactness and size. This lead to the development of our

concept of Retractable Transportable Homeless Shelter.

F. FINAL DESIGN

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