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A built-up beam has the following cross section: 7.5 cm 7.5 cm 10 cm 5 cm 4 cm 6 cm where x= 5 cm

For the following figure, calculate the Ad2 for each rectangle by Parallel Axis Theorem. (You must provide an answer before moving to the next part.) d2 d3 The Ad2 for each rectangle is as follows: Ad for piece 1- Ad2 for piece 2- Ad for piece 3 4 cm 4 4 cm

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Answer #1

given

x = 5 cm

Ad2 for piece 1 is say I1

I1 = hb3 / 12

= 5 x 7.53 / 12

I1 = 175.78 cm4

Ad2 for piece 2 is say I2

I2 = hb3 / 12

= 5 x 153 / 12

I2 = 1406.25 cm4

Ad2 for piece 3 is say I3

I3 = hb3 / 12

= 5 x 63 / 12

I3 = 90 cm4

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