A 16-ft-long column that is effectively pin-supported at both ends can be made by gluing together three identical 1.5" x 4.5" planks in either of the two configurations shown. Determine the Euler...

Extracted text: A 16-ft-long column that is effectively pin-supported at both ends can be made by gluing together three identical 1.5" x 4.5" planks in either of the two configurations shown. Determine the Euler critical load for each configuration. The planks are 4.5 in. Douglas fir (E = 1900 ksi). - - 1.5 in. (a) (b)