A Warren girder bridge truss that will be subjected to loads as shown above is to be designed and analysed. All triangles are equilateral triangles and member a-b is 2 m long. Calculate the following:

- State the nature of the framework.
- Calculate the reactions at the supports.

Using the method of sections (analytical method), calculate the magnitude of the internal forces in member b-c, b-g and g-h and state the sense (nature) of each force

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Framework:Framework:m=no ofmembers=15n=no of joints=9som=2j-315=29-315=15So this is perfect framed trussReactionsReactions:Take moment about i∑ Mi=0Re8-66-64-82=0Re=9.5KN∑ Fy=0Ri+Re-6-6-8=0Ri=10.5KNsectionSo take the section as shown:Take moment about g where 'b-g' and 'h-g' meets ∑ Mg=0Ri4-82-FBC2sin60=0FBC=15.01KNtensionEquilibrium about vertical∑ Fy=0-Fbgsin60-8+Ri=0FBG=2.54KNtensionEquilibrium about Horizontal∑ Fx=0Fbgcos60+Fhg+Fbc=0FBC=-16.28KNCompression ...