August 17, 20169 yr Posting from the field here. I am on my Interstate overpass project where I am the project land surveyor, and I was wrapping up a survey and admiring the work our union carpenters have done. As we lay out the bridge, the carpenters come in behind us and set the"false work". The false work is the forms and supports that hold the iron work and eventually the concrete as it's poured to form the bridge. After the bridge is built, the false work is lowered and striped, exposing the finished bridge. How do they lower the false work after the bridge is finished? Go ahead, take a guess. The clues are in the images. Look low, and think Egyptians!
August 17, 20169 yr Author 14 minutes ago, lew said: Probably not a guy with a sledge hammer. Well, a little bit of that Lew!
August 17, 20169 yr Author 5 minutes ago, Chips N Dust said: Aliens? Ha! Not quite, all though some of these bridge builders out here resemble an alien! Pretty rough looking group some of em!
August 17, 20169 yr BTDT...... And...more letters....LULL... Edited August 17, 20169 yr by steven newman
August 17, 20169 yr Author 10 minutes ago, steven newman said: BTDT...... And...more letters....LULL... Ok, ya got me on that one Steve, is this Gaelic or what!
August 18, 20169 yr LULL is a type of all terrain forklift. Another one was sold as a "Grade-all". We'd take the tension off the supports a bit, and slide out the shims. LULL to keep things from falling over BEFORE we wanted them to. Once there was enough clearance, we could start to remove the supports.....slowly and safely. BTDT= Been There,Done That.... Edited August 18, 20169 yr by steven newman
August 18, 20169 yr Author 6 minutes ago, steven newman said: Once there was enough clearance, we could start to remove the supports.....slowly and safely. BTDT= Been There,Done That.... Close but no cigar my friend!
August 18, 20169 yr I'm hoping long sticks and hot dogs aren't involved since we have to drive over those bridges. Dan
August 18, 20169 yr Author 2 hours ago, HandyDan said: I'm hoping long sticks and hot dogs aren't involved since we have to drive over those bridges. Dan That was good Dan. You know some times I wonder, when I drive these bridges!
August 18, 20169 yr Author I'll give y'all one more clue on how this false work is removed. It's so archaic, yet the method is used in the biggest of projects. Think sand, think Pyramids!
August 18, 20169 yr Maybe if the surface under the structure is compacted sand, you could wash it away.
August 18, 20169 yr They call them sand jacks. http://www.dot.ca.gov/newtech/researchreports/reports/2008/06-0633.pdf Dan Edited August 18, 20169 yr by HandyDan
August 21, 20169 yr Author That's it! Great job Dan. If you look closely at the images above, you'll see the sand jacks supporting the falsework. After the bridge is built and cured, we'll use one of two methods to release the pressure so the falsework can be loosened and lowered. Either holes will be drilled in the side of the sand jacks, allowing the sand to slowly spill out of the pour holes thus lowering the supports, or for a more rapid decent of supports, in some cases, the bands will be cut and the sand will all spill out at once. This method has been used to manipulate massive structures since the Ancient Egyptians. And it's amazing, we still use it today for large structures. Great research Dan!
August 22, 20169 yr 6 hours ago, John Morris said: That's it! Great job Dan. If you look closely at the images above, you'll see the sand jacks supporting the falsework. After the bridge is built and cured, we'll use one of two methods to release the pressure so the falsework can be loosened and lowered. Either holes will be drilled in the side of the sand jacks, allowing the sand to slowly spill out of the pour holes thus lowering the supports, or for a more rapid decent of supports, in some cases, the bands will be cut and the sand will all spill out at once. This method has been used to manipulate massive structures since the Ancient Egyptians. And it's amazing, we still use it today for large structures. Great research Dan! And it was the Aliens that gave it to the Egyptians...
August 22, 20169 yr Author 5 minutes ago, Chips N Dust said: And it was the Aliens that gave it to the Egyptians... Yer funny Chips....
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