Frame Structures
Design and build frame structures
Frame Structures
A frame structure is made of parts (members) joined together. The frame gives the structure its shape and strength. Examples include pylons, cranes, roof trusses and bicycle frames. Triangles are the strongest shape in frame structures.
Example
Building a Strong Frame
Make a square from 4 straws and pins — it wobbles easily (unstable).
Now add a diagonal straw across the middle — it becomes rigid!
This is why roof trusses and bridges use triangles — they cannot collapse like squares can.
Note
Remember
Triangulation (adding diagonals to create triangles) is the key to making frame structures strong and stable. The Eiffel Tower and electricity pylons in SA all use this principle.
Key Vocabulary
Frame structureA structure made of parts joined together in a skeleton
MemberOne part (bar or beam) of a frame structure
TriangulationAdding triangles to make a frame structure stronger
RigidCannot bend or change shape easily
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Frame structure
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