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## Main Question or Discussion Point

Hello,

I'm enrolled in College in the civil engineering program and am looking for guidance with calculating strength of steel square tubing.

We are making a project that has parameters.

1- Must be made of steel

2- 4"x6"x36" is maximum OD of section.

3- 14 lbs is maximum weight

4- the load will be applied at the connection, from the top aimed straight down

We are working on a reasonable budget and I'm working on simple, strong, efficient, designs.

Two of these pieces will be connected to each other, so there will be a connection point.

So far I'm thinking 3x3" square tubing with a wall thickness of 11 gauge at 34" long should do the trick. Looks like 10.6 lbs (according to website lists)

What types of steel should I be considering?

How do I calculate the strength of steel square tubing?

How to I calculate the connection points?

Should I scratch the idea of square tubing and go to a more complex design, like truss design?

Thank you

I'm enrolled in College in the civil engineering program and am looking for guidance with calculating strength of steel square tubing.

We are making a project that has parameters.

1- Must be made of steel

2- 4"x6"x36" is maximum OD of section.

3- 14 lbs is maximum weight

4- the load will be applied at the connection, from the top aimed straight down

We are working on a reasonable budget and I'm working on simple, strong, efficient, designs.

Two of these pieces will be connected to each other, so there will be a connection point.

So far I'm thinking 3x3" square tubing with a wall thickness of 11 gauge at 34" long should do the trick. Looks like 10.6 lbs (according to website lists)

What types of steel should I be considering?

How do I calculate the strength of steel square tubing?

How to I calculate the connection points?

Should I scratch the idea of square tubing and go to a more complex design, like truss design?

Thank you