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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#41
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Levels and a level
On Monday, March 19, 2018 at 1:48:49 PM UTC, The Natural Philosopher wrote:
On 19/03/18 11:11, Max Demian wrote: On 19/03/2018 10:26, Brian Gaff wrote: Well the earth is curved after all, so in reality nothing is flat or level is it? I wonder how big a thing (building? bridge?) has to be before designers have to take into account the curvature of the earth? The tracks supprting the radio telecopes at Madingley - at two miles long - were 'up' by IIRC 4 " at each end.. So not very big.. -- Climate Change: Socialism wearing a lab coat. and I seem to remember that the distance between the two towers of the Humber bridge is greater at the top than at the bottom, by about 1" I think. |
#42
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Levels and a level
On Wed, 21 Mar 2018 14:56:14 -0700, Murmansk wrote:
I've got one of these which works really well and is reasonably priced - suspect you can get it for less than £60 It projects a massive cross onto the wall and finds its own level once you've positioned it nearly right https://www.clasohlson.com/uk/Bosch-...ss-Line-Laser- Level/41-1001? gclid=CjwKCAjwhcjVBRBHEiwAoDe5x0BfsBp8tJK0biMpZe9D hMq3CPxXw_sz1O9y- m_Ot0wIVUrxNjxIbxoCv88QAvD_BwE Thanks. Mr. Stingy is already feeling a twinge about paying for a tripod when he already has two perfectly good ones........ Looks interesting, though. Cheers Dave R -- AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#43
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Levels and a level
On 21/03/2018 23:10, Jim K wrote:
Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian |
#44
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Levels and a level
Max Demian Wrote in message:
On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian If it was "perfectly flat" shurely it wouldn't dip anywhere? -- Jim K ----Android NewsGroup Reader---- http://usenet.sinaapp.com/ |
#45
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Levels and a level
In article ,
Max Demian wrote: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. Indeed, if you drive over one of these long bridges you are going "up hill" to the centre and then down again on the other side. -- from KT24 in Surrey, England |
#46
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Levels and a level
charles Wrote in message:
In article , Max Demian wrote: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. Indeed, if you drive over one of these long bridges you are going "up hill" to the centre and then down again on the other side. -- from KT24 in Surrey, England You can sometimes see ships going underneath too... -- Jim K ----Android NewsGroup Reader---- http://usenet.sinaapp.com/ |
#47
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Levels and a level
On Thu, 22 Mar 2018 11:24:29 +0000, Jim K wrote:
Max Demian Wrote in message: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian If it was "perfectly flat" shurely it wouldn't dip anywhere? I assume Max meant "optically flat" but you're right, gravimetrically speaking, the deck of the bridge would have a 'dip'. My main impression from photos of such suspension bridges is that the road deck arches up and over the crossing. I suspect this shape is chosen for structural stability rather than to allow stalled vehicles to be manually pushed clear of the bridge (and to prevent a whole bunch of stalled heavy goods wagons from gravitating towards the middle of the span due to failed parking brakes). :-) -- Johnny B Good |
#48
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Levels and a level
On Thu, 22 Mar 2018 00:45:04 -0700, Rednadnerb wrote:
On Monday, March 19, 2018 at 1:48:49 PM UTC, The Natural Philosopher wrote: On 19/03/18 11:11, Max Demian wrote: On 19/03/2018 10:26, Brian Gaff wrote: Well the earth is curved after all, so in reality nothing is flat or level is it? I wonder how big a thing (building? bridge?) has to be before designers have to take into account the curvature of the earth? The tracks supprting the radio telecopes at Madingley - at two miles long - were 'up' by IIRC 4 " at each end.. So not very big.. -- Climate Change: Socialism wearing a lab coat. and I seem to remember that the distance between the two towers of the Humber bridge is greater at the top than at the bottom, by about 1" I think. According to Tim+, almost 50% more than that (36mm in fact). -- Johnny B Good |
#49
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Levels and a level
In article , Jim K
wrote: charles Wrote in message: In article , Max Demian wrote: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. Indeed, if you drive over one of these long bridges you are going "up hill" to the centre and then down again on the other side. -- from KT24 in Surrey, England You can sometimes see ships going underneath too... I try not to look sideways -- from KT24 in Surrey, England |
#50
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Levels and a level
On Thu, 22 Mar 2018 11:24:29 +0000 (GMT+00:00), Jim K wrote:
Max Demian Wrote in message: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian If it was "perfectly flat" shurely it wouldn't dip anywhere? Flat is not horizontal, 'level' is. A roof can be at 45 deg. and flat (as is a wall). A large 'flat' roof (as commonly used) would have a pool of water in the middle after rain, as the edges are up with reference to gravity (assuming that the roof is level re. gravity). -- Peter. The gods will stay away whilst religions hold sway |
#51
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Levels and a level
PeterC Wrote in message:
On Thu, 22 Mar 2018 11:24:29 +0000 (GMT+00:00), Jim K wrote: Max Demian Wrote in message: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian If it was "perfectly flat" shurely it wouldn't dip anywhere? Flat is not horizontal, 'level' is. A roof can be at 45 deg. and flat (as is a wall). A large 'flat' roof (as commonly used) would have a pool of water in the middle after rain, as the edges are up with reference to gravity (assuming that the roof is level re. gravity). -- Peter. The gods will stay away whilst religions hold sway Your roof will fail ;-) So you're now saying something described as "perfectly flat" like a bridge deck, can have dips in it? Like a snooker table...? Mmm... -- Jim K ----Android NewsGroup Reader---- http://usenet.sinaapp.com/ |
#52
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Levels and a level
On 22/03/18 18:00, Jim K wrote:
PeterC Wrote in message: On Thu, 22 Mar 2018 11:24:29 +0000 (GMT+00:00), Jim K wrote: Max Demian Wrote in message: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian If it was "perfectly flat" shurely it wouldn't dip anywhere? Flat is not horizontal, 'level' is. A roof can be at 45 deg. and flat (as is a wall). A large 'flat' roof (as commonly used) would have a pool of water in the middle after rain, as the edges are up with reference to gravity (assuming that the roof is level re. gravity). -- Peter. The gods will stay away whilst religions hold sway Your roof will fail ;-) So you're now saying something described as "perfectly flat" like a bridge deck, can have dips in it? Like a snooker table...? Mmm... No. He is saying that a pool of water on Earth, is convex, like the atlantic ocean... -- Microsoft : the best reason to go to Linux that ever existed. |
#53
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Levels and a level
On Thu, 22 Mar 2018 18:00:50 +0000 (GMT+00:00), Jim K wrote:
PeterC Wrote in message: On Thu, 22 Mar 2018 11:24:29 +0000 (GMT+00:00), Jim K wrote: Max Demian Wrote in message: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian If it was "perfectly flat" shurely it wouldn't dip anywhere? Flat is not horizontal, 'level' is. A roof can be at 45 deg. and flat (as is a wall). A large 'flat' roof (as commonly used) would have a pool of water in the middle after rain, as the edges are up with reference to gravity (assuming that the roof is level re. gravity). -- Peter. The gods will stay away whilst religions hold sway Your roof will fail ;-) So you're now saying something described as "perfectly flat" like a bridge deck, can have dips in it? Like a snooker table...? Mmm... Something such as a snooker table needs to be level, not flat, i.e. all parts are normal to gravity. A flat surface, if the centre is normal (level) to gravity, will have the edges (well, away from the centre) as 'up' re. gravity. -- Peter. The gods will stay away whilst religions hold sway |
#54
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Levels and a level
On 23/03/2018 08:54, PeterC wrote:
On Thu, 22 Mar 2018 18:00:50 +0000 (GMT+00:00), Jim K wrote: PeterC Wrote in message: On Thu, 22 Mar 2018 11:24:29 +0000 (GMT+00:00), Jim K wrote: Max Demian Wrote in message: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. -- Max Demian If it was "perfectly flat" shurely it wouldn't dip anywhere? Flat is not horizontal, 'level' is. A roof can be at 45 deg. and flat (as is a wall). A large 'flat' roof (as commonly used) would have a pool of water in the middle after rain, as the edges are up with reference to gravity (assuming that the roof is level re. gravity). -- Peter. The gods will stay away whilst religions hold sway Your roof will fail ;-) So you're now saying something described as "perfectly flat" like a bridge deck, can have dips in it? Like a snooker table...? Mmm... Something such as a snooker table needs to be level, not flat, i.e. all parts are normal to gravity. Might be important if you have a /very/ large snooker table. Traditionally they are made from a single piece of slate, the cleavage layers being normal to the force of compression that formed it, so that /should/ be level however large; if used in situ you might have to jack up one end to make it level now. -- Max Demian |
#55
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Levels and a level
charles Wrote in message:
In article , Jim K wrote: charles Wrote in message: In article , Max Demian wrote: On 21/03/2018 23:10, Jim K wrote: Max Demian Wrote in message: On 21/03/2018 20:22, Jim K wrote: Johnny B Good Wrote in message: It was not I who was obsessed with bridges needing to be "flat", it was you. I think you are conflating Brian's mention about 'flatness' and curvature of the Earth corrections with my not being able to find a curvature of the earth divergence figure for the Severn bridge to compare against the figure that Tim+ had found for the Humber bridge. I made no mention of 'flatness' until you introduced it into this sub-thread. -- Johnny B Good Oh dear. Put very simply, if one wasn't trying to build something flat, why would one be bothered with calculations to the mm to allow for curvature of the earth ? ! To ensure that it's curved to the right degree? Such as a.........? (not a bridge shurely, if anything they are more likely to be hump backed...) A long, perfectly flat bridge deck would effectively dip in the middle from a gravity POV. You would probably want it to follow the curvature of the Earth. Indeed, if you drive over one of these long bridges you are going "up hill" to the centre and then down again on the other side. -- from KT24 in Surrey, England You can sometimes see ships going underneath too... I try not to look sideways -- from KT24 in Surrey, England Blinkers? -- Jim K ----Android NewsGroup Reader---- http://usenet.sinaapp.com/ |
#56
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Levels and a level
On Sun, 18 Mar 2018 14:11:00 +0000, David wrote:
Am I in a minority in being unable to set an accurate horizontal level against a vertical surface like a wall using a spirit level? There seems to be a degree(?) of variance between just touching and just past the line for the bubble which seems to be beyond my ability to discriminate. Fall back is measuring up the wall from a flat surface. A laser level might help (if I can get the level level, so to speak, which comes back to the original problem). What do the experts do? Bought the Bosch level as recommended. Looks good so far, except that the tripod will only reach up 4 feet. Dug out my stock of tripods and I can gain about another foot, but I want a line even higher up the wall. So now trying to work out what I can position opposite the wall which is tall enough AND broad enough to support the tripod so I can get the line where I want it. I can tilt the head, but I get the annoying flashing which says "I am not level" and also I need to be sure that it is level from side to side. Whatever do you do if you are trying to level a picture rail in a 18th Century room with 10 foot (or higher) ceilings? Ah well, nothing is easy. Cheers Dave R -- AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#57
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Levels and a level
Looks good so far, except that the tripod will only reach up 4 feet. Dug out my stock of tripods and I can gain about another foot, but I want a line even higher up the wall. So now trying to work out what I can position opposite the wall which is tall enough AND broad enough to support the tripod so I can get the line where I want it. The usual process is to use the laser line as a datum line and measure up from it to the height required. If you repeat the measurement in two places then you can use use a chalk line to get a continuous line at the height you need. Richard |
#58
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Levels and a level
On 05/04/2018 14:14, David wrote:
Whatever do you do if you are trying to level a picture rail in a 18th Century room with 10 foot (or higher) ceilings? Some have an extending floor-to-ceiling pole which can be used to mount the level at the right height - as eg in https://www.screwfix.com/p/bosch-tp-320-professional-telescopic-pole/3921K?k Some of us balance it on blocks a rung of a ladder leaning against the wall -- Robin reply-to address is (intended to be) valid |
#59
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Levels and a level
On 05/04/2018 15:53, Robin wrote:
On 05/04/2018 14:14, David wrote: Whatever do you do if you are trying to level a picture rail in a 18th Century room with 10 foot (or higher) ceilings? Some have an extending floor-to-ceiling pole which can be used to mount the level at the right height - as eg in https://www.screwfix.com/p/bosch-tp-320-professional-telescopic-pole/3921K?k Some of us balance it on blocks a rung of a ladder leaning against the wall Sorry, that should have been "the opposite wall" -- Robin reply-to address is (intended to be) valid |
#60
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Levels and a level
On 05/04/2018 14:14, David wrote:
On Sun, 18 Mar 2018 14:11:00 +0000, David wrote: Am I in a minority in being unable to set an accurate horizontal level against a vertical surface like a wall using a spirit level? There seems to be a degree(?) of variance between just touching and just past the line for the bubble which seems to be beyond my ability to discriminate. Fall back is measuring up the wall from a flat surface. A laser level might help (if I can get the level level, so to speak, which comes back to the original problem). What do the experts do? Bought the Bosch level as recommended. Looks good so far, except that the tripod will only reach up 4 feet. Dug out my stock of tripods and I can gain about another foot, but I want a line even higher up the wall. So now trying to work out what I can position opposite the wall which is tall enough AND broad enough to support the tripod so I can get the line where I want it. I can tilt the head, but I get the annoying flashing which says "I am not level" and also I need to be sure that it is level from side to side. Whatever do you do if you are trying to level a picture rail in a 18th Century room with 10 foot (or higher) ceilings? Stick a screw in the wall and hang it on that, or find something to clip it to. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#61
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Levels and a level
On 05/04/2018 15:34, Tricky Dicky wrote:
Looks good so far, except that the tripod will only reach up 4 feet. Dug out my stock of tripods and I can gain about another foot, but I want a line even higher up the wall. So now trying to work out what I can position opposite the wall which is tall enough AND broad enough to support the tripod so I can get the line where I want it. The usual process is to use the laser line as a datum line and measure up from it to the height required. If you repeat the measurement in two places then you can use use a chalk line to get a continuous line at the height you need. Or make up a storey stick - with a line to put the laser on, and then another indicating your required level. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#62
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Levels and a level
On Thu, 05 Apr 2018 15:53:16 +0100, Robin wrote:
On 05/04/2018 14:14, David wrote: Whatever do you do if you are trying to level a picture rail in a 18th Century room with 10 foot (or higher) ceilings? Some have an extending floor-to-ceiling pole which can be used to mount the level at the right height - as eg in https://www.screwfix.com/p/bosch-tp-...al-telescopic- pole/3921K?k Some of us balance it on blocks a rung of a ladder leaning against the wall Cool piece of technology! However that is nearly as much as I paid for the bloody level!!!! Cheers Dave R -- AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
#63
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Levels and a level
On Thu, 05 Apr 2018 18:45:41 +0100, John Rumm wrote:
On 05/04/2018 14:14, David wrote: On Sun, 18 Mar 2018 14:11:00 +0000, David wrote: Am I in a minority in being unable to set an accurate horizontal level against a vertical surface like a wall using a spirit level? There seems to be a degree(?) of variance between just touching and just past the line for the bubble which seems to be beyond my ability to discriminate. Fall back is measuring up the wall from a flat surface. A laser level might help (if I can get the level level, so to speak, which comes back to the original problem). What do the experts do? Bought the Bosch level as recommended. Looks good so far, except that the tripod will only reach up 4 feet. Dug out my stock of tripods and I can gain about another foot, but I want a line even higher up the wall. So now trying to work out what I can position opposite the wall which is tall enough AND broad enough to support the tripod so I can get the line where I want it. I can tilt the head, but I get the annoying flashing which says "I am not level" and also I need to be sure that it is level from side to side. Whatever do you do if you are trying to level a picture rail in a 18th Century room with 10 foot (or higher) ceilings? Stick a screw in the wall and hang it on that, or find something to clip it to. Drawing pin in the ceiling and some thread? Managed to balance my middle tripod on a chair with the tripod legs nearly folded into the centre. Wobbled a bit but did the job. Having pointed to a device which is basically a plaster's third arm with a bit clipped to it, painted added value Bosch green I am now idly wondering if I could do something similar. Cheers Dave R -- AMD FX-6300 in GA-990X-Gaming SLI-CF running Windows 7 Pro x64 --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus |
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Levels and a level
David wrote:
Robin wrote: https://screwfix.com/p/telescopic-pole/3921K that is nearly as much as I paid for the bloody level!!!! Got one of those lidaldi ratcheting "dead man" props? Fix the level to it with magnets/insulating tape/ty-raps/etc |
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