The most sustainable glue for wood?

[nybyggarn3]

I cannot answer that, they do decide on building notifications/permits on a case-by-case basis. There are probably many stairs that have fallen between the cracks and there are also many constructions where they require engineers. In a municipality that concerns me, they require this when building an upper floor, which is usually common in cases with stairs. Thus, the stairs are included in the application. Or am I wrong?

Normally, an engineer looks at normal loads, for vehicles a passenger is counted as 70kg, so we say it should hold this and 5 times as much, which is a common safety margin. That becomes 350kg. Thus, it must be assumed that the stairs will never be loaded with more weight, so it should be able to support 3 people weighing 115kg each standing on it at the same time.

It must also be assumed that this load should be managed within an area that corresponds to a footprint and on the entire step surface. A foot is quite small.

I find it hard to see that these stairs can support a 350kg foot at the very edge of the step, and for that reason, I don't think an engineer has approved the construction. Thus, neither has the municipality, if they required a statement, which I therefore assume they haven't. Hence, I wrote that it is probably not placed in a single-family or multi-family house.

When I built my house a few years ago, the municipality didn't ask any questions about the stairs. However, they were interested in the handrail.

 

[roli]

I cannot answer that, as they decide on building notifications/permits on a case-by-case basis. There are probably many stairs that have fallen between the cracks, and there are also many constructions where they require input from structural engineers. In a municipality that concerns me, they require this, for instance, when building an upper floor, which is usually common in cases with stairs. Thus, the staircase is also included in the application. Or am I wrong?

Generally, a structural engineer looks at the usual load; regarding vehicles, a passenger is considered to weigh 70kg, so we say it should withstand this and up to 5 times as much, which is a common safety margin. This amounts to 350kg. It is therefore assumed that the stairs will never be loaded with more weight and should thus withstand 3 people of 115kg standing on it simultaneously.

It is also assumed that this load should be handled within an area corresponding to a footprint and over the entire surface of the step. A foot is quite small.

I find it difficult to see that this staircase can handle a 350kg footprint at the edge of the step, and for that reason, I don't believe an engineer has approved the construction. Thus, neither would the municipality if they required an opinion, which I therefore assume they haven't. Hence, I wrote that it is probably not placed in a single-family or multi-family house.

A lot of rambling here. Do you have any idea what applies or are you just guessing? Where is the requirement that a step must handle 350 kg over the area of a foot?? You need to stop guessing now and produce the relevant facts.

 

[patriklarsson]

When I built my house a few years ago, the municipality didn't ask any questions about the stairs. However, they were interested in the handrail.

They don't need to if they consider it beyond doubt that the stairs fulfill their function.

 

[patriklarsson]

A lot of rambling here. Do you have any idea what applies or are you just guessing? Where is the requirement that a step must withstand 350 kg on the area of a foot?? You need to stop guessing now and present the relevant facts.

It is normal construction regulations in Sweden that the strength is at least 5 times the normal load; if you buy something from China, it's probably less, hence the quality. It works "most of the time."

Feel free to provide counter-evidence instead so I don't have to take that responsibility.
Do you know any engineers?
A buddy in Västervik municipality had to hire an engineer to design and then build a single-car garage.
That requirement doesn't exist in the municipalities I frequent, for example. It's up to the building inspector and can vary from case to case.

 

[roli]

That was not an answer to my questions. So you don't know?

 

[patriklarsson]

That wasn't an answer to my questions. So you don't know?

I'm guessing. Do you have any idea?

I haven't said there's a requirement, but rather how you calculate from a construction perspective. If the measurement from the vangstycke out to the edge is 300mm and a step is 10cm wide, you calculate the load point at 250mm and the area for a step, then you take the strength of the wood species, in this case probably pine, add thickness and depth, and the remaining calculations involve middle school mathematics.

I don't remember everything now 20 years later and have no need to immerse myself in it either, but it will probably come back quickly if I wanted to.

The stairs I've built should handle 350kg without a problem, that's not particularly much. Compare it to a roof truss and the forces a roof is subjected to. Just concrete tiles weigh around 3.5 tons/100sqm. It should then handle 15 tons of snow load.

So what are you wondering?

 

[Alfredo]

now I am torn between sniffing the glue or getting the popcorn

Why "or" when "and" exists?

 

[raveper]

Your double standards are comical.
Reported for what?
That I have different opinions than you?
There isn't a constructor who shares your views?
If you have a certificate for the stairs from the building office, can you post a copy here?

My opinions are relevant regarding the construction of your stairs and it's hardly just you who should be having a monologue here, especially considering several inaccuracies you bring up that might inspire others to make the same mistakes.

I respect your choices, and that's why I think you should stand by them like a man, without making things up.
Understand your choices, how can I when I think they are incorrect??
You don't convince me.
I have no aggression towards you if you think so, but now you're making threats?
Do you think an example like the above portrays you as an idiot?
There are many people who daily put others in danger without thinking or even caring.
For this reason, there are laws and rules, hence interesting to see if your construction fulfills these?
We wouldn't have had to push it to this point if you had only listened to more experienced opinions, which you disregard

Give it a rest.

 

[patriklarsson]

Just for fun, I found that a foot has about 73cm2 of contact area. Therefore, 350kg becomes less than 5kg/cm.

We can assume that most harder types of wood can withstand that since a wooden floor on a chair can endure higher weight.
Thus, the strength will be decided by the fastenings and the load-bearing parts of the construction.

There is a difference between having a staircase you can walk up and down calmly and carefully, compared to a staircase you can jump up and down on.
You don't have to do it, but it can happen, which is why an engineer takes that into account in their calculations.

There is probably a slight difference between different engineers' opinions, but fundamentally they come from the same school of thought.

Everything manufactured is based on these theories, and if you don't know what you're doing, then things go wrong like with the bridge in India.

You can also construct a roof that can handle the summer months or days without weather and wind; it works for the time being but also doesn't meet the existing regulations.

I think the question is quite irrelevant to the thread, but I also don't like the OP's unpleasant attitude.
There are people here with significantly more experience who might speak up for a reason.
Taking offense in that case is the wrong approach.

 

[raveper]

Just for fun, I found that a foot has about 73cm2 of contact surface. Thus, 350kg becomes less than 5kg/cm.

We can assume that most harder types of wood will withstand this since a wooden floor from a wooden chair must endure higher weight.
Therefore, the strength will be determined by the fastenings and the load-bearing parts of the construction.

There is a difference between having a staircase you can walk in calmly and carefully compared to a staircase you can stand and jump in.
You don't have to do it, but it can happen, which is why a designer accounts for it in their calculations.

There are likely slight differences between various designers' opinions, but at the core, it's the same school/teachings.

Everything that's manufactured is based on these theories, and if you don't know what you're doing, well, it goes like the bridge in India.

You can also design a roof that withstands the summertime or days without weather and wind, it works temporarily but also doesn't meet the existing regulations.

I think the question is somewhat irrelevant to the thread, but I also don't like the OP's unpleasant attitude.
There are people here with significantly more experience, who might speak out for a reason.
Being offended is the wrong way to go about it.

What's wrong with you? Clown..

 

[Hep]

These are normal construction rules in Sweden that the strength is at least 5 times the normal load.

It's been quite a while since I went to school, but that doesn't match well with my memory.

Then I wonder what TS has done to make you almost obsessed with going after him. Sure, a bit of a bad attitude in his response at the beginning, but now you've taken over that role by a long shot. Time to let this go and move on now.

 

[patriklarsson]

Now it was quite a long time since I went to school, but that very poorly matches my memory.

Then I wonder what TS has done to make you almost obsessed with attacking him. Sure, a bit of a bad attitude in his initial response, but now you've taken over that role big time. Time to let this go and move on now.

I don't like the attitude? I haven't written anything negative about TS other than that I see several flaws in the construction and receive a response that there absolutely aren't any. Whereupon TS wants to report me after an example of what could happen with a faulty construction and then comes with threats like, "hope something happens to you," etc. I absolutely don't take offense, but I think I can show that I know what I'm talking about until proven otherwise.

 

[raveper]

[media]
I don't like the attitude?
I haven't written anything negative about TS other than that I see several flaws in the design and get the response that there absolutely aren't any.
Whereupon TS wants to report me after giving an example of what could happen with a faulty design and then comes with threats like, "hope something happens to you," etc.
I absolutely don't take offense, but I think I can show that I know what I'm talking about, until proven otherwise.

Sure.. joking a bit with ts is okay but you seem to have serious problems.
Get a life.

 

[Plupp 358496]

I absolutely LOVE all these threads about sizing!

So many self-proclaimed experts, convinced of their own infallibility.
Rarely or never is there anything other than opinions presented as facts.
Never any reference to applicable standards and regulations. Just arbitrary guesses.

Need to order more popcorn for the next show!

 

[patriklarsson]

Sure... joking a bit with the OP is okay but you seem to have serious issues. Get a life.

What do you perceive as a problem? The OP clearly can't take jokes or questioning comments. The reason I bring up construction/permit issues is that the OP denies everything but has worked somewhat in the construction industry? Which is worrying to me. I would aim for a different profession. Thank you, same to you?? (I am very satisfied with my life)!