- Thread starter fizzy
- Start date
gaz1
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you mean whilst the british stuff was hounded into having ratings and safety tests done to them
the imported rubbish wasnt
whilst the british rated stuff was under rated they could handle 1 and a third more as they had to be over rated to pass the uks stringent tests
whilst the imports got nothing, only what they could lift tests if that
so much for the h&s doing stringent tests on all imports to make sure there safe to use
whilst killing our own marketLol that's fine - apology very graciously accepted
Maker
Most folk just call me; Orange Joe
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Just out of curiosity I tried to work it out on paper, I make the deflection 0.64mm for a 3 tonne load in the centre, which is less than I was expecting so I probably made a mistake.
Excuse the handwriting, I haven't held a pen all year.
That does assume the Youngs modulus of the steel is 200GPa, the ends are simply supported, the load is static, there's no flaws or defects, the cows are spherical and in a vacuum, etc etc. Don't crush yourself following the advice of someone on the internet pretending to be an engineer.
Excuse the handwriting, I haven't held a pen all year.
That does assume the Youngs modulus of the steel is 200GPa, the ends are simply supported, the load is static, there's no flaws or defects, the cows are spherical and in a vacuum, etc etc. Don't crush yourself following the advice of someone on the internet pretending to be an engineer.
Thanks for all the effort Even if you are 50% out it should be fineJust out of curiosity I tried to work it out on paper, I make the deflection 0.64mm for a 3 tonne load in the centre, which is less than I was expecting so I probably made a mistake.
View attachment 359323
Excuse the handwriting, I haven't held a pen all year.
That does assume the Youngs modulus of the steel is 200GPa, the ends are simply supported, the load is static, there's no flaws or defects, the cows are spherical and in a vacuum, etc etc. Don't crush yourself following the advice of someone on the internet pretending to be an engineer.
Johnnybravo
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As long as you tighten the bolts until they strip, then back them off a quarter turn , you will be fineThanks for all the effort Even if you are 50% out it should be fine
Barking Mat
Cuddler of hedgehogs.
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Is it already in place ?
Stick a huge weight in the middle on a block and tackle, stick a dti gauge on the beam, and see how much it deflects / flexs.
Don't stand underneath it.
Stick a huge weight in the middle on a block and tackle, stick a dti gauge on the beam, and see how much it deflects / flexs.
Don't stand underneath it.
Hi fizzy with the beam dimensions you have provided and a free span of 2000mm a 3000Kg [29430N] load will produce a maximum stress in the beam of somewhere around 40N/mm*. If this beam is loaded to a permissible stress level of around 180N/mm* it will carry around 13000Kg [125530N]. If your beam in a reasonable condition it should be trouble free as a lifting support. Good luck and work safely.
Brilliant! I thought it looked far better than the modern ones rated at much higher loads!
I will jack the wheels just in case even though they also look much better than the modern junk.
Just noted it's your first post?
Welcome to the forum!
Barking Mat
Cuddler of hedgehogs.
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Welcome @carbonarc , there's an introduction thread somewhere.
