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Post by melikepie on Jan 10, 2016 20:41:58 GMT
I saw this at Oxford Circus and was wondering what it was.
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Post by superteacher on Jan 10, 2016 21:25:10 GMT
I saw this at Oxford Circus and was wondering what it was. What was it displayed on? |
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Post by melikepie on Jan 10, 2016 21:27:34 GMT
It was displayed on a cupboard on the platform
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Post by whistlekiller2000 on Jan 10, 2016 21:36:04 GMT
It was displayed on a cupboard on the platform Sounds like part of a riser or duct for cabling and/or other services and equipment. |
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Post by Tomcakes on Jan 10, 2016 21:40:22 GMT
Could be for services e.g. water, leccy, gas?
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Post by melikepie on Jan 10, 2016 21:41:03 GMT
What is a riser?
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Post by whistlekiller2000 on Jan 10, 2016 21:57:22 GMT
A riser is a form of vertical duct, usually quite capacious. In my time I've sent thousands of cables up and down risers. |
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Post by londonstuff on Jan 10, 2016 22:04:42 GMT
It reminds me of this, spotted several years ago at GPS on the side of the track wall  Even the SS, whom I knew, didn't know what it was...  |
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Post by John Tuthill on Jan 10, 2016 22:33:00 GMT
It reminds me of this, spotted several years ago at GPS on the side of the track wall Even the SS, whom I knew, didn't know what it was... Isn't the "backflap" a device which allows water to flow in one direction only? |
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rincew1nd
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Post by rincew1nd on Jan 10, 2016 23:25:41 GMT
Ignoring londonstuff's backflap manhole (ROFL, btw), a service void to me is a bit of empty space that's used to carry services such as electricity, telecoms etc. So in this case it's likely to be a shaft that carries the electricity feed from the surface and the like. |
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Post by John Tuthill on Jan 11, 2016 11:12:43 GMT
A riser is a form of vertical duct, usually quite capacious. In my time I've sent thousands of cables up and down risers. When I was on install and later servicing, I was always wary of opening any door marked 'riser.' Some of the older buildings it was literally an open shaft from top to bottom. More recently they had an open grill 'floor' but more recently the last lot I worked on were solid floors with all cables/pipes fire stopped top and bottom. |
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Post by whistlekiller2000 on Jan 11, 2016 12:50:42 GMT
A riser is a form of vertical duct, usually quite capacious. In my time I've sent thousands of cables up and down risers. When I was on install and later servicing, I was always wary of opening any door marked 'riser.' Some of the older buildings it was literally an open shaft from top to bottom. More recently they had an open grill 'floor' but more recently the last lot I worked on were solid floors with all cables/pipes fire stopped top and bottom. Oh yes! I recall dropping a rather large drum of 24 core fibre optic cable onto one of those grills - don't ask me why. The whole lot gave way and dropped two floors, quite incredibly doing absolutely no damage to any of the existing electrical and data services en-route. On another occasion with a riser featuring solid floors with ducts either side, we discovered a stash of "Over 50s" pornographic magazines which, thanks to some other paperwork contained within the bag, we traced to the young man sitting at the desk nearest the riser cupboard door. He was totally unfazed! Apart from big spiders and the occasional rat, that was the most unusual find we ever made. Even above ground it was a dirty, sweaty and unforgiving job, albeit very well paid. As a result, running cables in the hot and dark tunnels of LUL wasn't something I ever wanted to do. |
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class411
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Post by class411 on Jan 12, 2016 9:00:48 GMT
When I saw the title of this thread I thought is was some fancy new way of saying there was a very large interval between successive trains.
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Even the SS, whom I knew, didn't know what it was...
