Which of the following beams/trusses is classified as statically determinate structure?

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DDA JE Civil 01 Apr 2023 Shift 3 Official Paper
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Option 1 :
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Explanation:

1) Cantilever beam

Ds = 3 - 3 = 0 So, the given beam is determinate

2) Propped Cantilever beam

DS = 4 – 3 = 1

Statically indeterminate

3) continuous beam

DS = 3 × C - R = 3 × 2 – 4 = 2

Where C is the number of cuts required to make the structure free and R is the number of restrained required

Statically indeterminate

4) Truss

DS = m + r - 2j = 6 + 3 - 2 × 4 = 1

Where m is the number of members, r is the number of reaction and j is the number of joint

Statically indeterminate 

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