required steel tubes sizes

Question

required steel tubes sizes

D159159 (Student)

(OP)

22 Dec 20 16:59

Hi,
What is the required steel tubes sizes for this sketch?

Rectangular or square tubes.
Green=?
Black=?
Red=?

And it has to withstand a maximum of 120 km/h wind load.
The cover is pvc 500g/m2

PEinc (Geotechnical) · Answer 1 · 2020-12-22 19:26:52

What did your calculations show?

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BAretired (Structural) · Answer 2 · 2020-12-23 01:57:53

The truss looks too shallow. I would start by making a pin at the crown and at the bottom of each column. That makes it a 3 hinged arch which is statically determinate. You can solve it quickly and get a rough idea of the magnitude of the axial forces and moments occurring at various points.

You may decide to give the truss and possibly the columns a tapered shape, similar to many pre-engineered buildings.

BA

Answer 3

[Post Deleted]

BAretired (Structural) · Answer 4 · 2020-12-23 18:30:52

Quote (wrightpeter)
When difficulties accumulate, the student simply loses interest, without which even the most brilliant teacher will not be able to convey knowledge to the proper extent. For example, I cannot write my essay. Unfortunately, the general school curriculum is designed for the average student and does not take into account these nuances. Let's think about how we can subtly, without pressure, increase motivation to study.

Off topic! Quit making excuses! You can write your essay, and you can do it without cheating. Address the OP's question or else start your own thread.

Merry Christmas.

BA

PEinc (Geotechnical) · Answer 5 · 2020-12-23 18:54:37

PAretired, if you click on his link, wrightpeter seems to be selling or encouraging, essay writing services to students.

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BAretired (Structural) · Answer 6 · 2020-12-23 21:16:10

PEinc,

Okay, I missed that. That makes him even less worthy to be contributing to this thread in my humble opinion. It means he is not only in favour of cheating, he is promoting it and presumably profiting by it.

Merry Christmas to all.

BA

Artisi (Mechanical) · Answer 7 · 2020-12-23 23:51:16

I also missed the point/link, needs a red flag.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

PEinc (Geotechnical) · Answer 8 · 2020-12-24 17:38:58

Already been flagged yesterday.

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PEinc (Geotechnical) · Answer 9 · 2020-12-24 17:43:21

I see that the post is listed as having been deleted. Yet, I still see it and the sales link still works. Re-Flagged the post.

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Zenaku (Student) · Answer 10 · 2021-01-13 15:58:01

The question was asked by a person who does not want to figure it out himself

PEinc (Geotechnical) · Answer 11 · 2021-01-13 17:48:43

The OP never responded. I suggest the entire thread be deleted.

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required steel tubes sizes