It was cool to learn all the weights and tensions involved - those are some big stresses the towers have to withstand! Still, I find it kind of funny that even with all the modern construction equipment and techniques, the towers themselves look virtually unchanged from those built 70 or 80 years ago.
the lattice style towers will remain like that until our construction materials change. With current steel, that still remains the most efficient structure in terms of material usage. So while the construction methods may change a lot, structures built for cost effectiveness will look the same until engineers find a new material that has different properties to steel, and is as cheap.
I'm the engineer that designed the towers shown. There are three major differences in the towers even though they look the same as those build in the past. 1. The steel is stronger - all steel in these towers is 50 ksi compared to 33 to 45 ksi in older towers. 2. The main legs use a cruciform which is 4 angles bolted together compared to a single welded plate angle in older towers. The cruciforms are much cheaper to manufacture but more work to assemble. 3. Bolts are much stronger today in shear so fewer bolts are sometimes needed. By the way, the wire tensions mentioned in the video are bare wire tensions. The tensions we use to design the towers are much higher because we include one inch of radial ice on all wires - 18 subconductors plus two optically powers ground wires (plus marker balls).
@@daveh6856 Yes I guessed this particular tower must be heavily reinforced due to its combination of long unsupported span on one side and large deviation angle, which must put heavy and uneven stresses on the tower. My comment was simply that to the untrained eye, it LOOKS just like those towers of old in terms of its basic outline. One curious aspect of this line is that they routed it with that sharp change of direction immediately after that big span, necessitating such a heavily reinforced (and presumably more expensive?) tower. I wonder why they did that. Surely space constraints are not a major issue in the area? My thought was that it would be cheaper to have straight-line suspension towers of extended height either side of the river span then the angle towers immediately after that, thus avoiding the need for such heavily braced non-standard towers such as this... or maybe thats not the case and there was a practical reason for designing it this way?
@soundseeker63 the new double circuit tower had to be located at the same spot as the single circuit tower it replaced due to right of way issue's. And you are correct that this design was very expensive because of the line angle..
thanks for your video , it makes one appreciate the hard work that these Brothers do. thanks to all of them. Almighty God bless and protect them all. thanks again.. a salaam-Peace
That wind in the gorge is serious, we went thru there in a moving truck when I was a kid, the engine was going all out and we were lucky to be making 45 against the wind. Coming across wyoming- it was a long move we were doing upto 70 at about the same RPM. That helo pilot has nerves of steel and is a freaking dexterous mutant. It is amazing how something so spidery is so strong, those steel pieces have to be bigger than they look assembled.
Wow that's pretty crazy what goes into that. See tons of these spanning 100's of km and it's easy to not realize what goes into it. It also looks brutal hot there, not fun conditions to work in at all.
I know I’m just one viewer but I really do enjoy these videos, I would LOVE to see more !
It was cool to learn all the weights and tensions involved - those are some big stresses the towers have to withstand! Still, I find it kind of funny that even with all the modern construction equipment and techniques, the towers themselves look virtually unchanged from those built 70 or 80 years ago.
the lattice style towers will remain like that until our construction materials change. With current steel, that still remains the most efficient structure in terms of material usage. So while the construction methods may change a lot, structures built for cost effectiveness will look the same until engineers find a new material that has different properties to steel, and is as cheap.
I'm the engineer that designed the towers shown. There are three major differences in the towers even though they look the same as those build in the past. 1. The steel is stronger - all steel in these towers is 50 ksi compared to 33 to 45 ksi in older towers. 2. The main legs use a cruciform which is 4 angles bolted together compared to a single welded plate angle in older towers. The cruciforms are much cheaper to manufacture but more work to assemble. 3. Bolts are much stronger today in shear so fewer bolts are sometimes needed.
By the way, the wire tensions mentioned in the video are bare wire tensions. The tensions we use to design the towers are much higher because we include one inch of radial ice on all wires - 18 subconductors plus two optically powers ground wires (plus marker balls).
@@daveh6856 Yes I guessed this particular tower must be heavily reinforced due to its combination of long unsupported span on one side and large deviation angle, which must put heavy and uneven stresses on the tower. My comment was simply that to the untrained eye, it LOOKS just like those towers of old in terms of its basic outline.
One curious aspect of this line is that they routed it with that sharp change of direction immediately after that big span, necessitating such a heavily reinforced (and presumably more expensive?) tower. I wonder why they did that. Surely space constraints are not a major issue in the area? My thought was that it would be cheaper to have straight-line suspension towers of extended height either side of the river span then the angle towers immediately after that, thus avoiding the need for such heavily braced non-standard towers such as this... or maybe thats not the case and there was a practical reason for designing it this way?
@soundseeker63 the new double circuit tower had to be located at the same spot as the single circuit tower it replaced due to right of way issue's. And you are correct that this design was very expensive because of the line angle..
thanks for your video , it makes one appreciate the hard work that these Brothers do. thanks to all of them. Almighty God bless and protect them all.
thanks again..
a salaam-Peace
I for one appreciate the music!
That wind in the gorge is serious, we went thru there in a moving truck when I was a kid, the engine was going all out and we were lucky to be making 45 against the wind. Coming across wyoming- it was a long move we were doing upto 70 at about the same RPM. That helo pilot has nerves of steel and is a freaking dexterous mutant.
It is amazing how something so spidery is so strong, those steel pieces have to be bigger than they look assembled.
Hell yeah makes me super proud to be a UNION LINEMAN
Great video- This helps with perspective on the tasks involved with such a project.
What is the song playing in the last part of the video? Rockin'
Amazing!
way to go nice work!!
Wow that's pretty crazy what goes into that. See tons of these spanning 100's of km and it's easy to not realize what goes into it. It also looks brutal hot there, not fun conditions to work in at all.
How much time it takes to install 1 tower.?
How much time is for the wiring process?
I would like to work for them
Just for all you not know it all's, 500KV is 500,000 Volts or simply known as 500Kilo Volts......Kilo meaning a thousand.
This Tower Looks Line Tayabas- San Jose Trans line here in The Philippines
Special thanks to everyone's hard work and dedication on this spectacular project. Learn more at www.wilsonconst.com/services
The video documentary and commentary are excellent. The music soundtrack adds nothing of valuer but distraction and annoyance.
Great narration! You could have done without the music.
METRIC come on it's 2017.
this soundtrack sucks