With supporting examples, what are the three most commonly used rolled structural steel shapes and where they are used.

I have tried simple truss, triangular truss, plane truss, tetrahedron, tetrahedral truss, and tetrahedron truss in the box. And each of these inputs were said to be incorrect. Please do not give me a solution that contains any of these inputs as the answer. I will rate. Thank you.

Give the list of the various types of welded joints

An engineer is designing a beam to support a flooring system above it, as well as two walls. The beam will be a T-section, though the engineer is considering the idea of combining timber and steel to create a composite member for the application. The dimensions of the T-section beam are shown below: dw The dimensions of the T-section beam are shown below: bf Flange (horizontal section of cross-section): • bf = 340 mm tf = 15 mm ● Walls Flooring Beam

The Aluminum plates below are connected by two 3/4" diameter bolts. What is the shear stress in the bolts given the load applied?

What is the ultimate strength of an ASTM A36 Steel (Use Appendix G/ Page 501-502) Do not use any external source to answer this question ? Ksi. Your answer should be a numerical value Do not include anything else. Example: If the appendix indicates that the ultimate strength is 88 ksi, your answer should be 88