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GRADE 9 STRUCTURES
Proposal
• Discussing tentative
solutions
Problem
statement
Design Brief
Investigation
Proposal
Initial stages
Research
Development
Planning
Making
Testing
RECAPPING
ON THE
PREVIOUS
LESSONS
 In 2016, a bridge collapsed in a small community in the Vaal area after the rainy
seasons. Since then, local residents have been struggling to access the city using a
safe proper infrastructure. During rainy season, the river swells twice its normal
width making it impossible to walk or swim
 While others believe that the collapse of the bridge was triggered by the rainy
season, the have been speculations implying that the bridge might have collapsed
due to poor maintenance or negligence by the local municipality.
 Therefore, your construction company has applied for a tender that was
advertised by the local municipality.
• Poor maintenance led to the
collapse of the Vaal bridge
• This was a linking bridge
providing access to the CBD
• Since the bridge collapsed in
2016, residents were forced
to used unsafe alternative
ways to access the CBD
 Old Linking Bridge collapsed due to poor Maintenance.
 The Vaal community does not have easy access to the city
 Disruption in the flow of goods between the two places
 The inconvenience has affected local business profits
 The stretching Force
 A member under tension force is called a tie
 Referred to as turning force
 The turning or twisting force that causes torsion is called
torque
Combination of tension force and
compression force
CONSTRUCTIN
G A NEW
BRIDGE
 Discussing viable solutions with the client
 Check whether problem has been understood and interpreted properly
 Specifications and measurements of the product
 Looks at the time frame needed to design and make the product
 Appropriate time frame
 Set of the Required material
Should withstand heavy
weights
Should act against
compression force, tension
force and torsion force
Should be appealing
Discussing viable
options with the
client
How much time
and material
needed to execute
the task? With
detailed
specifications
Briefly discuss
how this solution
will solve the
problem
experienced by
the Vaal
community

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Proposal stage

  • 2. Proposal • Discussing tentative solutions Problem statement Design Brief Investigation Proposal Initial stages Research Development Planning Making Testing
  • 4.
  • 5.  In 2016, a bridge collapsed in a small community in the Vaal area after the rainy seasons. Since then, local residents have been struggling to access the city using a safe proper infrastructure. During rainy season, the river swells twice its normal width making it impossible to walk or swim  While others believe that the collapse of the bridge was triggered by the rainy season, the have been speculations implying that the bridge might have collapsed due to poor maintenance or negligence by the local municipality.  Therefore, your construction company has applied for a tender that was advertised by the local municipality.
  • 6. • Poor maintenance led to the collapse of the Vaal bridge • This was a linking bridge providing access to the CBD • Since the bridge collapsed in 2016, residents were forced to used unsafe alternative ways to access the CBD
  • 7.
  • 8.  Old Linking Bridge collapsed due to poor Maintenance.  The Vaal community does not have easy access to the city  Disruption in the flow of goods between the two places  The inconvenience has affected local business profits
  • 9.  The stretching Force  A member under tension force is called a tie
  • 10.  Referred to as turning force  The turning or twisting force that causes torsion is called torque
  • 11. Combination of tension force and compression force
  • 12.
  • 14.  Discussing viable solutions with the client  Check whether problem has been understood and interpreted properly  Specifications and measurements of the product  Looks at the time frame needed to design and make the product  Appropriate time frame  Set of the Required material
  • 15. Should withstand heavy weights Should act against compression force, tension force and torsion force Should be appealing
  • 16. Discussing viable options with the client How much time and material needed to execute the task? With detailed specifications Briefly discuss how this solution will solve the problem experienced by the Vaal community