Write all the steps on your paper, and submit them in the question below.

Find the forces in each member of the structure. Don't forget that the members in a truss are only in tension$/$compression $($normal forces only$).$

Which similar section of rectangular tubing made in Aluminum $6061$ will you use for members ABC and DEF and why? Rectangular tubing $|$ McMaster$-$Carr Links to an external site.

Try to use a square tubing first, as it is easier, but you can propose a rectangular tubing too.

The Yield Strength of the material is: $35,000$ psi

You don't need to provide the smallest section as possible, you just need to provide a section that will safely handle the load.

You don't include yet the hole made by the bolt at the different connections.

Which section will you use for member BE and why?

Which shoulder bolt will you use and why? Shoulder Bolt $-$ McMaster$-$Carr Links to an external site.

Use the larger force at one of the connection with the wall.

Use a shear strength $=$ tensile strength provided $40,000$ psi.

Check if the normal stress in the bar are still under the ultimate stress, with the new area of the tubing. If not, do not redo your calculation, just explain will changes you will do$.$

Do not count the bearing stress, as we don't have the ultimate strength information.

If the point F is moving down delta y $=6$ in$,$ find the normal strain in each member. Did point D move?

Consider that the strain in AB and BC is the same.

Consider that member BE doesn't have any strain!

Consider that the strain in DE and EC is the same.

You can use a CAD software to find the new lengths.

In the box below, enter the force in member ABC in lbs