Good morning gentlemen!
Congratulations must go to Thor, Peter, Nick, Norman, Andy, Gordon, Andries, and Derek for their correct guess. AND, a big thank-you for everyone else who contributed. If you guessed that it was a section of a wooden water main, you were spot on.
That’s a good website Andy!
I had a good laugh at your suggestion Terry, especially since the pipe measures almost 24″ (600mm) diameter. I’d expect that it would require an oversized mouth and produce a note so low that only whales would be able to hear it.
Now here are the details to accompany my photographs in my album marked “A Load of Junk?” :-
About a kilometre from where my wife and I live, engineers are installing and coupling a new gas pipe into the current system in order to boost the gas pressure. During the excavation process reaching down to a depth of about 3 metres, a section of an old water main was severed to make way for the new pipe and some valve gear. It was this piece of pipe which had been torn up, and placed near the walking track which our dog and I use every morning. At first, I thought the pipe was just a bit of an old farm drain shoved under the track, but it was the construction which really caught my eye. So later in the afternoon, camera in hand, I set off.
As I was about to take photographs, one of the engineers came over to see what I was doing.
“What is it?” I asked.
“It’s a piece of a wooden water main, perhaps a hundred or more years old.” he explained.
I later checked on the Internet, and discovered that in Australia, these pipes could have been layed in the late 1800’s. We chatted a bit more about the pipe’s construction, then I took a string of pictures.
The pipe measures about 23″ inside diameter, and the inside layer is made up of 22 strips of red gum, which appear accurate enough and fit together very neatly to have been machined inside and out. (See my diagram). Besides being curved in profile, they are partially tenoned with `V’ shaped (90 degree) tenons.
Wrapped around the layer of red gum is a layer of 5/16″ diameter steel wire, which has been wound around at about 13/16″ pitch. A third layer covers the wire and appears to be felt-like. This is heavily coated in bitumen which was still sticky to the touch. Upon further examination, the inside of the pipe may have been coated with a cement-like substance, although this may be just a coating of silt. My photograph of the inside of the pipe seems to indicate that the bottom of the pipe was on the left, while on the right, there is just a small amount of surface rot.
There is clear evidence that the pipe was made in sections and spigoted one end into the next. However, it wasn’t possible to determine the length of a section of this pipe since some of the piece was still in the ground. The condition of the wood is quite remarkable, with hardly any signs of rot. Similarly, the steel wire has been well protected from rusting.
What sort of pressure must this pipe have had to endure, if the pipe were running full from a mountain water supply? The engineer said he would like to know how they arranged a bend in a pipe of this design. There can also be quite large forces in play as the water changes direction.
So far, I haven’t found details of a pipe of this type of construction, which come anywhere near 24″ diameter. That would also explain why the steel wire was wrapped around with such a close pitch.
As for my skeleton clock project Norman, a series of health issues have distracted my attention somewhat, as has working in an over hot garage.
Best regards to all,
Sam
Edited By Sam Stones on 06/04/2011 01:17:48