Interplay

Material: Rigid Material: Board of max. dimensions 120 mm long, 20 mm wide, and 1 mm thick. Flexible Material: Thin Printing Paper of max. dimensions 100 mm long, 100 mm wide, and lesser than 80 gsm,Flexible thread, thin transparent OHP sheet, pins, rubber-based adhesives

Task: Students are required to pick a pair of end conditions from the options, and construct them1000 mm apart. Make a 1000 mm x 100 mm piece of OHP sheet and span it between the end conditions. The OHP should be broken into 3 or 5, or 7 and shall be placed in a horizontal plane. Stabilise this OHP sheet using the assigned materials.

While stabilising follow the following conditions: In stable conditions, the OHP sheet should not deflect more than 5 mm at the center under a 3kg uniform load over the entire spanning system. Material sizes should not exceed the specifications given. All connections have to be pin connections. Threads should be fixed at all connections and cannot slide. Distance between two parallel members should be 10 mm or more. Adhesives can only be used to connect your members at end conditions.

Tests: The system should not deflect more than 5mm under uniform loading of 3 kg. The system should not break under 30 times its own self-weight or 10 kg load.

Learning Outcomes:

1. To derive a structural system that is able to resolve the intended load. 2. To physically realise the resolution of forces. 3. To recognise and articulate forces while addressing direction and magnitude. 4. To develop systems of joinery based on the behaviour of forces and mechanism of load transfer. 5. To develop modules that can repeat to form stable and complex assemblies. Identify materials for the spanning system and make a model at the end condition with the module next to it at the 1:5 scale.

(2 week)