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Calc check – moment of inertia on centroidal yy axis – Rick

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Calc check – moment of inertia on centroidal yy axis – Rick

Calc check – moment of inertia on centroidal yy axis – Rick

Hi, I am new to these calcs and was wondering if anyone could confirm a calculation on the Moment of inertia on centroidal yy axis of an uneven U beam made of 4mm steel.
Base along the x axis is 50mm wide and 4 thick
Vertical section is 100mm high and 4mm thick
Top section is 25mm wide and 4 mm thick.
Total area = 28,600mm ^2
Centroidal y axis of 42.81mm
Moment of Inertia = 6.19 x 10^5 mm^4
Cheers Rick

Document Preview:

25

21
4

4
84
98
8232
258905.10405536235

400
50
20000
21186.63750343625

184
2
368
338954.90714379621

668
28600
619046.6487025948

100
668

42.814371257485028

4

46
4

50

A1
A2
A3
Y axis centroid
Area moment of inertia =
bd
(cubed) / 12 + A1x(x-cx) (squared)
Area
mid to X
Moment of inertia
divide by Area

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