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... exist No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher 13 7 A column is made of A-36 steel, has a length of 20 ft, and... cross-sectional area of A = 2.48 in2 and a radius of gyration about the x axis of rx = 1.26 in and about the y axis of ry = 0.879 in The smallest radius of gyration occurs about the z axis and is rz... currently exist No portion of this material may be reproduced, in any form or by any means, without permission in writing from the publisher 13 13 An A-36 steel column has a length of m and is fixed