Problem 4 Geometric characteristics. For a given cross-section consisting of a channel and an equilateral angle, or from an I-beam and an equilateral angle, or a channel and an I-beam, it is required: 1) to determine the position of the center of gravity; 2) find the axial and centrifugal moments of inertia with respect to random axes passing through the center of gravity; 3) determine the direction of the main central axes; 4) find moments of inertia relative to the main central axes; 5) draw a section in the scale 1: 2.
DANO: I-beam # 22; Corner number 9; 90×90×6.

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