Man nearly falls off roof after ladder buckles - GIF

Man nearly falls off roof after ladder buckles.

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Previously:

https://www.homemadetools.net/forum/...339#post215155
https://www.homemadetools.net/forum/...702#post147876
https://www.homemadetools.net/forum/...737#post190293
https://www.homemadetools.net/forum/...752#post220246
https://www.homemadetools.net/forum/...045#post221188

Is it just the camera angle or does that roof appear to have a 16 to 18-12 pitch? I get a nosebleed just thinking about going on a 6-12 pitch anymore.

He did not consult Euler.

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Originally Posted by tonyfoale

He did not consult Euler.

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Yes, Euler should always be consulted before crossing ladders or bridges.

Should always hook those ladders over the ridge when working on steep pitch roofs. Hooked over the ridge, the ladders are in tension and will not buckle like that. With that set up he had, he is lucky the ladders laying on the roof did not push the bottom ladder away from the wall.

Hope he had a helper on the ground to assist him in getting off the roof. Assuming the helper was not disabled by the falling ladder.

I had to look up Euler.

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Originally Posted by hemmjo

Should always hook those ladders over the ridge when working on steep pitch roofs. Hooked over the ridge, the ladders are in tension and will not buckle like that. With that set up he had, he is lucky the ladders laying on the roof did not push the bottom ladder away from the wall.

Hope he had a helper on the ground to assist him in getting off the roof. Assuming the helper was not disabled by the falling ladder.

I had to look up Euler.

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If his helper is still alive and dodged the falling tiles!

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Originally Posted by hemmjo

I had to look up Euler.

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Then you probably got a lot of info about his achievements in mathematics. Engineers know him for providing the understanding of critical buckling loads.

Fc = pi^2 *E*I/(K*L)^2 E,I and L have their usual meanings, K is a factor between 0.5 and 2 depending on the end fixations. This gives the maximum load that a slender column can support without buckling under. Regardless of how strong the material is.

It has always fascinated me how those early thinkers figured out all of these vitally important details. The mathematical concepts, relationships of the stars and the planets, etc.

They did all of this with their own minds, no computers to help them.

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Originally Posted by hemmjo

It has always fascinated me how those early thinkers figured out all of these vitally important details. The mathematical concepts, relationships of the stars and the planets, etc.

They did all of this with their own minds, no computers to help them.

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Well, for one thing, most of them studied mathematics. Today, most folks never get beyond arithmetic and aren't even proficient at that. Most notably, they studiously avoid any post-schooling opportunity to learn any math.

Without algebra one can't express a mathematical concept in a form that allows it to be manipulated and study the effects of such manipulation. Geometry is essential to characterizing the real world so you can explore it and understand it.

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Originally Posted by mklotz

Well, for one thing, most of them studied mathematics. Today, most folks never get beyond arithmetic and aren't even proficient at that. Most notably, they studiously avoid any post-schooling opportunity to learn any math.

Without algebra one can't express a mathematical concept in a form that allows it to be manipulated and study the effects of such manipulation. Geometry is essential to characterizing the real world so you can explore it and understand it.

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Oh I totally agree. But I am taking about the people who FIRST discovered and began to actually use it. Before anyone can study it, someone had to realize that it existed.

https://historycooperative.org/who-i...d-math/existed.

As a retired teacher, I do agree that many school and teachers schools are failing badly.