These pictures make my teeth itch

[Rotaree]

Enricogto said:

..... tire.......

It's a 'tyre' you're in London!

Sorry, people using using American spelling makes my teeth itch!

[guru_1071]

yellowjack said:

the little ones are all printed - I got a box for easter!!!

[yellowjack]

guru_1071 said:

the little ones are all printed - I got a box for easter!!!

Fair enough. I was going on the image on the box, which definitely shows a bunny with a ribbon and a bell. Happy to have been corrected, though

[Squiggs]

Tell me I'm not the only one that cringes and has to avert their gaze when approaching an otherwise lovely looking Alfa.
Why were the poor things designed in such a way that they have to have their number plates bolted to one side?

[The Nur]

Squiggs said:

Tell me I'm not the only one that cringes and has to avert their gaze when approaching an otherwise lovely looking Alfa.
Why were the poor things designed in such a way that they have to have their number plates bolted to one side?

The car was designed to look good without a front numberplate, it is UK law that blights them.

[Monkeylegend]

Squiggs said:

Tell me I'm not the only one that cringes and has to avert their gaze when approaching an otherwise lovely looking Alfa.
Why were the poor things designed in such a way that they have to have their number plates bolted to one side?

You are not the only one.

[Bullett]

I've been put off buying a 4C for that very issue.

[sleep envy]

[Pit Pony]

irocfan said:

Pit Pony said:

mybrainhurts said:

Justaredbadge said:

Spoon, fork, knife in a cutlery drawer.

Ah, so that's where I'm going wrong. Thanks......

You have teenagers, who are forced to help wash up and put away, and really don't give a st.

I feel your pain.

at least your's wash up

Wifey, seems to think that as one is Studying for finals, and the other is studying for A levels, and exams are only weeks away, they no longer need to do that. But wait until the end of June, and I have a list of jobs that need doing. Like painting the outside of the house.

[Tom_C76]

DrDoofenshmirtz said:

I think compression support is stronger. You could argue that tension support would most likely result in the straight bar collapsing upwards...And it certainly looks better.

Steel is much stronger in tension than compression. Compressive strength decreases with increasing slenderness too whereas tensile strength is constant.

[littleredrooster]

Tom_C76 said:

DrDoofenshmirtz said:

I think compression support is stronger. You could argue that tension support would most likely result in the straight bar collapsing upwards...And it certainly looks better.

Steel is much stronger in tension than compression. Compressive strength decreases with increasing slenderness too whereas tensile strength is constant.

Indeed. The Euler theory and equations, if I remember my studies from 1971 correctly.

[Enricogto]

Rotaree said:

Enricogto said:

..... tire.......

It's a 'tyre' you're in London!

Sorry, people using using American spelling makes my teeth itch!

Ugh, sorry, you're right.....

[LordGrover]

sleep envy said:

[GreenDog]

LordGrover said:

sleep envy said:

That makes me smile

[droopsnoot]

Dave G fsi said:

Some more nightmares:

These remind me of a level crossing close to here. All the road sections were lifted while some track alignment (or something) was done, then put back down in a seemingly random order. Played havoc with the box junction markings, not least as the track is around 45 degrees to the road.

[droopsnoot]

Tom_C76 said:

DrDoofenshmirtz said:

I think compression support is stronger. You could argue that tension support would most likely result in the straight bar collapsing upwards...And it certainly looks better.

Steel is much stronger in tension than compression. Compressive strength decreases with increasing slenderness too whereas tensile strength is constant.

That surprises me, though I have no engineering knowledge. Surely in this case, though, the potential weak point is the weld between the diagonal and the horizontal spar at the outer point, and if that were to fail, having the diagonal underneath the horizontal would allow it to continue to give support? And having the weight pulling down against that weld must surely increase the chances of it failing, compared to having the weight pulling the horizontal down against the diagonal?

[Doobs too]

droopsnoot said:

Tom_C76 said:

DrDoofenshmirtz said:

I think compression support is stronger. You could argue that tension support would most likely result in the straight bar collapsing upwards...And it certainly looks better.

Steel is much stronger in tension than compression. Compressive strength decreases with increasing slenderness too whereas tensile strength is constant.

That surprises me, though I have no engineering knowledge. Surely in this case, though, the potential weak point is the weld between the diagonal and the horizontal spar at the outer point, and if that were to fail, having the diagonal underneath the horizontal would allow it to continue to give support? And having the weight pulling down against that weld must surely increase the chances of it failing, compared to having the weight pulling the horizontal down against the diagonal?

Steel is equally strong in tension and compression, but the compressive strength of a structure, regardless of the material from which it is made, is its propensity to buckle. In this example the two pertinent variables are the length of the member in compression and the load it reacts.

Let's assume the failure mode of the structure will be the buckling of the compressed member, so the welds and the mounting are infinitely strong. If we assign each short side of the triangle a length of 1 this gives a hypotenuse of length of 2^-2 (sorry, no square root sign). If the hanging basket has a mass of 'g' then the compressed member reacts a load of 2^-2g when the frame is the 'correct' way up, but only g when it is the 'wrong' way up. This, coupled with the fact the compressed member is shorter when the frame is upside down, I think the upside down version is stronger.

I wish I could have thought of another term for compressed member.

[LordGrover]

Doobs too said:

Steel is equally strong in tension and compression, but the compressive strength of a structure, regardless of the material from which it is made, is its propensity to buckle. In this example the two pertinent variables are the length of the member in compression and the load it reacts.

Let's assume the failure mode of the structure will be the buckling of the compressed member, so the welds and the mounting are infinitely strong. If we assign each short side of the triangle a length of 1 this gives a hypotenuse of length of 2^-2 (sorry, no square root sign). If the hanging basket has a mass of 'g' then the compressed member reacts a load of 2^-2g when the frame is the 'correct' way up, but only g when it is the 'wrong' way up. This, coupled with the fact the compressed member is shorter when the frame is upside down, I think the upside down version is stronger.

I wish I could have thought of another term for compressed member.

√

Unicode 221A

[RizzoTheRat]

droopsnoot said:

That surprises me, though I have no engineering knowledge. Surely in this case, though, the potential weak point is the weld between the diagonal and the horizontal spar at the outer point, and if that were to fail, having the diagonal underneath the horizontal would allow it to continue to give support? And having the weight pulling down against that weld must surely increase the chances of it failing, compared to having the weight pulling the horizontal down against the diagonal?

However if you're assuming the weakest point is the weld, and it it's failing under tension that will be catastrophic, then whichever way up you put it you still have the same problem, diagonal above can fail at the outer diagonal weld, while diagonal below can fail at the right angle weld.

[SeanyD]

DrDoofenshmirtz said:

People who mount hanging basket brackets upside down need to be dragged into the street and publicly birched. Drives me mad

The things you learn on PH... off home soon to make a couple of (ahem) modifications outside of our house.