Scaffolding pipe.....question for PH engineers..............
Discussion
OK,
I need to get a piece of 8 foot scaffolding pipe to secure an extremely heavy weight to.......
Now.... which would be stronger, and less liable to bend.......Solid steel, or hollow thick tubing like scaffolding pipe???...
I asked an engineer who owned a sheet metalworks once, and he said the hollow pipe would be far stronger, and would not bend, something to do with molecular structure or somesuch............
Any ideas??........
I need to get a piece of 8 foot scaffolding pipe to secure an extremely heavy weight to.......
Now.... which would be stronger, and less liable to bend.......Solid steel, or hollow thick tubing like scaffolding pipe???...
I asked an engineer who owned a sheet metalworks once, and he said the hollow pipe would be far stronger, and would not bend, something to do with molecular structure or somesuch............
Any ideas??........
Depends on a few things... If you assume the outer diameter is the same then the solid rod will be stiffer.... but for the same material cross sectional area (where the solid rod will have a much smaller diameter than the pipe) the pipe will be much stiffer.
All to do with 2nd moment of area i think.. of which I've forgotten the equations ((pi)bd^4)/64 or something along those lines.
All to do with 2nd moment of area i think.. of which I've forgotten the equations ((pi)bd^4)/64 or something along those lines.
Wacky Racer said:
OK,
I need to get a piece of 8 foot scaffolding pipe to secure an extremely heavy weight to.......
Now.... which would be stronger, and less liable to bend.......Solid steel, or hollow thick tubing like scaffolding pipe???...
You seem to have decided on the scaffolding pipe already? How heavy is 'extremely', and how is it going to be supported by your bar/pipe? Unless the pipe is obviously massively over specced for the job, I suggest you need to go into this in a lot more detail than you are doing. The fact that you're even considering alternatives make me think it is NOT obviously over specced and it doesn't sound to me as if you are qualified to decide whether it will be safe.I need to get a piece of 8 foot scaffolding pipe to secure an extremely heavy weight to.......
Now.... which would be stronger, and less liable to bend.......Solid steel, or hollow thick tubing like scaffolding pipe???...
AdeTuono said:
What is 'extremely' heavy? I wouldn't trust an 8' length of scaffold to hold much over 4-500lbs if only supported at either end.
exactly what I was about to say - scaffold poles on their own are not very strong. (I managed to bend a 6ft one with my puny frame resting on it) - it's the triangulation they structure them into that makes them strong. Wacky Racer said:
AdeTuono said:
What is 'extremely' heavy? I wouldn't trust an 8' length of scaffold to hold much over 4-500lbs if only supported at either end.
A 24 foot motor home..........
Please for God's sake, let me move my car...
Well done that man!Wacky Racer said:
AdeTuono said:
What is 'extremely' heavy? I wouldn't trust an 8' length of scaffold to hold much over 4-500lbs if only supported at either end.
A 24 foot motor home..........
Let me elaborate......
I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite...
..
So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel clamps, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite...
..So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel clamps, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
Edited by Wacky Racer on Friday 22 August 13:57
Wacky Racer said:
Let me elaborate......
I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite.....
So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel champs, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
If a couple of small pieces of wood will hold a large jet aircraft in place while they run engine tests, I have a sneaky suspicion that a couple of appropriately sized blocks will also hold your motorhome in situ should you the handbrake fail...I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite...
..So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel champs, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
Wacky Racer said:
Let me elaborate......
I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite.....
So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel champs, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
You could try drilling two sets of holes in your drive way, insert two dowel bars per set, a pair of railway sleepers backing up against the dowel bars and your campervan's wheels resting against the sleepers.... that would avoid you destroying not only your neighbours home but also dragging the rubble of your stone garage into it too.. I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite...
..So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel champs, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
Davi said:
Wacky Racer said:
Let me elaborate......
I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite.....
So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel champs, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
If a couple of small pieces of wood will hold a large jet aircraft in place while they run engine tests, I have a sneaky suspicion that a couple of appropriately sized blocks will also hold your motorhome in situ should you the handbrake fail...I have just bought a new motorhome, and have rather a large drive, so as it is a flat area I have parked it half way across my large picture front window, which spoils our lovely view over the Pennine moors...
The alternative is park it slightly away from the house, on block paving in front of a detatched stone single garage, that I hardly use, the problem being this area ia ALMOST flat, but directly behind where the (very long) home would stand, the drive goes into a very steep 15 degree drop, and I am worried that even if I leave it in first gear, if the handbrake cable snapped it would career off down the drive and demolish the house opposite...
..So, I figured, if I chocked all four wheels with concrete blocks, and fitted a couple of wheel champs, AND wedged a piece of pipe across the floor of the garage wedged up against substantial stone door pillars on the inside of the garage, and secured the motorhome to this via a strong rope or chain it should alay my fears....
Hence the question....
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