Calculate the maximum allowable load (in kN) that a nominal 300mm x 300 mm sawn lumber column, 3.0m long, can carry. The applied loading is for 15-year duration and the wood used is visually graded sawn Yakal (E = 9.78 GPa, Fc = 15.8 MPa). The column is effectively held in position at both ends and is fixed for both ends.

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Two wooden planks, each 12 mm thick and 225 mm wide, are joined by the dry mortise joint shown. Knowing that the wood used shears off along its grain when the average shearing stress reaches 20 MPa, determine the magnitude P of that axial load which will cause the joint to fail. provide your answer in kN with precision to two decimal points. 16 mm 16 mm 25 mm 50 mm 225 mm P P 50 mm 25 mm Answer:

(a) Draw the shear and bending-moment diagrams for the beam and loading shown below. 48 kips 48 kips 48 kips B A E -6 ft- 2 ft' 2 ft 2 ft (b)If the cross-section of the beam is as shown below, determine the maximum tensile and compressive stresses. 8 in. 1 in. 1 in.- 6 in. 1 in. 4 in.