sizing replacement spreaders

Why is it that you always find a way to do this Paul? The bar certainly is in compression, though there is some cantilever exposure, this is predominantly in the spreader itself <removed comment>

Roscoe, your initial instincts were correct, the Dwyer setup is appropriate for a rig setup like yours <removed comment directed towards Paul B>

 

Are you implying I force you to post inaccurate information time after time?

I suppose you will tell us what it is being compressed between? This should be good.


Maybe as good as this:

Wow. If the loads are not transmitted to the mast, but though it, I wonder where they end up?

 

Another typical paul b post, to quibble over compression or cantilever. You must have been pottie trained at gun point . . .

 

Let's recap:

The OP comes to this board with questions. He is trying to gather information to make the best decision he can before he spends his hard earned cash.

He asks a specific question about a topic you apparently know nothing about. Instead of gracefully withdrawing from the topic you feel the need to just make something up.

When you are exposed for the poseur that you are you throw a hissy fit.

This is not the first time you have displayed this bizarre behavior. It's not the second time, or the third. This is an ongoing issue with you. What psychological problem would cause someone to act this way?


When someone comes to this site to try and get helpful information he/she should leave with better info than they arrived with. If someone continually posts inaccurate information just to stoke their own ego it detracts from the usefulness of the site.

 

It should be possible to have a good intelligent discussion without the need for personal insults and jabs at other posters.

If you have better information to post on the topic at hand, please do. Strong disagreement can lead to good debate. But please, be considerate of other members. Namecalling or belittling other posters accomplishes nothing other than making it unpleasant for everyone else. Let's stick to debate on the actual facts, and leave out any further jabs or needless insults directed towards other members.

 

Question:

How can there be a "good debate" when one of the parties makes up "facts" out of whole cloth?

 

A fact, reference, calculation, or diagram could be posted showing the error or opposing view in a polite and scientific way.

Adding little jabs and insults directed towards other members doesn't add anything to the discussion.

 

Are you kidding?

Every time some nut posts something way out in left field you expect people to waste time researching and drawing a diagram to prove them wrong? Especially when the nut is not going to believe the facts anyway no matter how much actual data is presented?

It is up to the nutjob to prove his outlandish claim. Usually when they are challenged and given the opportunity to prove their claim they go into hissy fit mode. Getting caught in a whopper makes some people cranky.

 

When the discussion focuses on the facts of the actual topic at hand, you get discussion that people can enjoy and learn from. When people insert extra unnecessary jabs, insults and belittle other members, the result is a page of garbage that no one enjoys and the actual discussion or ability to learn from it gets lost.

 

The problem is there are members who like to make up "facts" to make them feel important. When they are called out on that they feel insulted and belittled. Nothing will change that. Nothing angers a liar like having someone point out their lies.

Anyone who posts nonsense like, "The spreader bar is a compression post, designed to transmit loads through the mast, rather then to the mast." SHOULD be insulted, just as much as they insult us by posting something like that!

Maybe you expect the rest of the members here to provide research and graphs when a nutjob posts, "Seawater is naturally pink." It is up to the nutter who posts something like that to back it up, rather than expecting the rest of the members to waste time trying to educate someone who doesn't want to learn.

 

If something is posted that someone sees is wrong, in the best case they do have enough time to say:

"I'm sorry, this is wrong because of xyz. A better way to look at it is ...."

Thankfully many here are here to help everyone else and are giving enough to explain things without hostility simply to build knowledge and help everyone else.

If less time is available, a simple post along the lines

"Sorry, I can't agree with that. In my view that is wrong."
or
"Can you provide something to explain or backup this claim?"

serves the purpose.

However, posts calling other forum members "nutjobs" or "liar" serve no positive purpose. No one learns anything from this type of insult or jab, and it only creates noise to obfuscate the discussion at hand.

 

Maybe you should look at Post #15. No one was called a nutjob. It was simply pointed out that the bar is not a "compression post" and loads are transmitted to the mast, not "through it". By the way, what does that mean anyway?

We'll never know because the hissy fit and name calling begins in the very next post. If you make stuff up you sure can't back it up with calculations or diagrams, so time to go on the attack and start a war.

Those who tell whoppers just get pissy when they are exposed. Again and Again and Again.

 

The request is simple: when you feel the desire to insert a little jab only for the purpose of insulting or belittling another member, please step away from your keyboard or go to facebook or some other site. This goes for everyone. This site is not for attacking or insulting other members.

 

Oh dear, this is nonsense.

Take a look at the simple forces involved.



If you have a wire/stay coming off the top of the mast and if it goes over a spar/bar, you must pull it over, if you don’t it will flop about and it is not doing anything. Thus, the wire between mast and end of bar is in tension, it is being pulled.

Look at the lower end, it is being pulled to the deck. Again if the wire is not being pulled, it is floppy and again, does nothing, ergo it is in tension as it is pulled.

So, looking at the end of the bar, what is occurring?

You have 2 tensile loads and an unknown load in an unknown direction. The way to establish this is by the triangle of forces, where the sum of the forces must be in equilibrium. It is it not, then the system is not stable ie it will fall over!..clearly this is not the case.

So drawing the triangle of forces, to maintain the directional flow of force and equilibrium, the only direction the force can be, is to the right, ie into the bar, which means..compression!

 

The best part John is the actual part, which isn't made by Kenyon (exclusively), is commonly called, at least by it's parts catalog number a "spreader compression bar". It floats in a slot through the mast, but hey what do we know.

Of course it's in compression and a cantilever would suggest some sort of purchase with an overhanging something or other. Since the part is through bolted at each end, a cantilever is a verbal stretch to say the least, but arguing with Paul B is well, easily observed for what it is.