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Post by Deleted on Nov 24, 2019 8:11:31 GMT
Got me idly wondering if these rather large gates are proving to be a bit of a question mark. Seeing as it is impractical to get a contract land based crane to the site, and there are relatively small bridge holes both sides of that lock, is CRT actually capable of doing a gate replacement or will they rely on bodging and re-bodging the repairs. At some stage the gates will need to be replaced but the question of how to lift them seems to be quite interesting. Of course they could go back to the old methods and build sheerlegs ...... that is if anyone knows how to tie the correct knots Exactly ! 2001 when gates were last done is not that long ago but I have a feeling that at that time the Hanson Denham-West Drayton gravel contract was running which helped enormously in vehicle access to the lock. Now that has closed I don't believe there is a proper access. You can get there but I don't think a crane would. Being tall gates and obviously only liftable from land or empty lock water level it does seem intriguing. ETA having checked the gravel run didn't start until 2003 so maybe the gates were previously replaced using a floating crane.
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Post by naughtyfox on Nov 24, 2019 9:03:08 GMT
At some stage the gates will need to be replaced but the question of how to lift them seems to be quite interesting. Really not hard.
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Post by The Lockie on Nov 24, 2019 11:03:12 GMT
crane barge anyone? or have they all been sold off?
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Post by JohnV on Nov 24, 2019 11:26:10 GMT
crane barge anyone? or have they all been sold off? They have certainly got rid of quite a few in the Northeast (but most of them are a bit too big for the ditches)
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Post by Deleted on Nov 24, 2019 11:40:11 GMT
crane barge anyone? or have they all been sold off? I was just wondering about the fact there are old fashioned bridge holes with fairly limited air draft close to the lock on both sides and that they are very tall lock gates (bottom gates).
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Post by Jim on Nov 24, 2019 13:27:51 GMT
crane barge anyone? or have they all been sold off? I was just wondering about the fact there are old fashioned bridge holes with fairly limited air draft close to the lock on both sides and that they are very tall lock gates (bottom gates). silly boy, they don't transport them vertically.
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Post by Gone on Nov 24, 2019 15:27:08 GMT
crane barge anyone? or have they all been sold off? I was just wondering about the fact there are old fashioned bridge holes with fairly limited air draft close to the lock on both sides and that they are very tall lock gates (bottom gates). I bet you wished you had thought a bit more before posting that.............
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Post by Deleted on Nov 24, 2019 15:47:28 GMT
I was referring to the size of crane required to safely lift the gates I assume you are both having a giggle. Bearing in mind it can only be done with lock empty as they are the bottom gates.
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Post by naughtyfox on Nov 24, 2019 15:59:58 GMT
Why can't gates be built beside the lock? I mean, they didn't build the Millennium Dome in Matlock and have it transported to London.
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Post by thebfg on Nov 24, 2019 20:15:04 GMT
Float them down on the water and then just attach them to some rigging,above their height. They will naturally go vertical as the water drains and then roll the rigging into place.
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Post by samsam on Nov 25, 2019 4:48:10 GMT
If they were proper greenheart gates, they wouldn't float. I don't understand why they persist in making lock gates from substandard timbers. The steel ones that they used in the '70s are in the main still serviceable and don't need any upkeep other than paddle gear and closing mitres.
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Post by naughtyfox on Nov 25, 2019 7:42:49 GMT
What if they were made of oak and not greenheart?
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Post by Deleted on Nov 25, 2019 7:45:12 GMT
Floating lock gates would not work though would they.
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Post by JohnV on Nov 25, 2019 7:53:21 GMT
Floating lock gates would not work though would they.
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Post by samsam on Nov 25, 2019 8:19:41 GMT
What if they were made of oak and not greenheart? That is the problem, they are made of cheap oak but its worked green and not allowed to season before the gates are fitted so it rots quickly. They do float to a degree.
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