ALEXANDER MURPHY
EDWARD MURPHY
JOSHUA MICALLEF
KRISENTIA TEDJA

Banksiaview Professional Services:

Banksia

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2.0 PROJECT OVERVIEW 

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2.1 Project Description 

In the state of New South Wales Australia, laws and regulations regarding the storage of water for recreational 
purposes continue to change. Open storage devices such as a pool or drop tank which accumulate more than 
30cm of water, require a barrier to protect vulnerable minorities such as children. Without these barriers, the 
consequences for these individuals may be catastrophic. Blockades such as fences for small decorative 
storage devices are considered an eye-sore from a landscapists point of view. In the context of this project, a 
drop tank (fed from a pools wet edge) will be considered.  

The engineering project seeks to design and fabricate a minimalist solution to this contemporary regulation. 
Through manufacturing a platform that hovers over the water-line of a drop tank (with an appropriate 
underwater structure supporting the platform), this will have the potential to protect an individual from 
submerging into water upon impact. 

2.2 Design Objectives 

The following goals seek to establish a direction of design to be utilised throughout this project. 

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2.2.1 Resistance to Elements 

Any structure that is composed must be sensitive to constant water, wind, temperature and salt 

exposure. The device mustn’t interfere with the tank’s PH levels and overall acidity.  

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2.2.2 Degradation 

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The longevity of the product must be considered a priority as decomposition from constant salt, force 

and water is certain. The products lifespan must be prolonged for an extended period of time without 

the need of regular conservation work.  

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2.2.3 Durability 

The assembly must be hard-wearing against sudden, solid forces of significant mass. The structure 

must hard wearing and rigid to hold a constant mass of significant weight. 

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2.2.4 Safety 

 The assembly must consider the safety of an array of parties - occupants, tank maintenance staff and 
 passing patrons. The construction must act as a deliberate and stable barrier between the outer 
 environment and internal tank space. The product must have no insecure fragments that could  
 impale or score any harm towards personages and present wildlife. 

 

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2.3 Statement of Requirements 

The platform shall be able to withstand a constant force of 50kg. 

The platform shall be able to withstand a sudden brute force of 70KG. 

The platform shall be able to endure constant exposure to daylight for 10 years. 

The platform shall be able to endure constant exposure to salt for 10 years. 

The platform shall withstand constant immersion into water for 10 years. 

The platform will not alter the tanks PH level above 7.5. 

The platform will not alter the tanks salinity level above 4500ppm. 

The platform will not alter the tanks calcium hardness above 450ppm 

The platform shall be able to withstand wind thrusts of up to 100km/h. 

The platform structure shall be made from High Density Polyethylene HDPE. 

The platform shall withstand constant exposure to temperatures up to 65 degrees celsius. 

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3.0 DIAGRAMS 

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The following 3D schematics are an engineers depiction of this storage tank before construction commences 
followed by an indication of the project upon conclusion. 

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3.1 Before Construction 

3.1.1 Top View 

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L= 922.5cm +/-1cm

L

W1

W2

W3

W4

W5

W6

W1= 92cm +/-1cm 

W2= 93cm +/-1cm 

W3= 91cm +/-1cm 

W4= 93cm +/-1cm 

W5= 85cm +/-1cm 

W6= 80cm +/-1cm 

3.1.2 Side View


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H=84cm +/- 1cm

W1= 92cm +/-1cm

W1

H

Height (H) measurements are calculated from the bottom of the interior drop tank to the bottom lip of the tiles. 

Width (W) measurements are calculated from the left hand drop tank wall to the right hand drop tank wall under 
the lip of the tiles. 

H

W6

H=84cm +/- 1cm

W6= 80cm +/-1cm

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L

L= 922.5cm +/-1cm

A=

A

3.1.3 Front View

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B

B

A

A= 45cm+/-1cm 

B= 50cm+/-5cm 

A= 12cm+/-1cm 

B= 12cm+/-1cm 

3.1.4 Re-fill Float Apparatus 

A= 12cm+/-1cm 

B= 12cm+/-1cm 

C= 45cm+/-1cm 

D= 41cm+/-1cm 

E= 41cm+/-1cm

A= 41cm+/-1cm 

B= 12cm+/-1cm 

C= 7.5cm+/-1cm 

D= 6cm+/-1cm

A

B

C

D

A

B

C

D

E

Water        Line

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A= 56cm+/-1cm 

B= 10cm+/-1cm 

C= 22cm+/-1cm 

D= 12cm+/-1cm

A

B

C

D

D

3.1.5 Drop Tank Drainage/Pump Ports