Stringing and Sagging a High-Voltage Transmission Line (1950)

BPA staff discovered “Stringing and Sagging” after releasing the first volume of BPA-produced films in 2013. It turned up in a group of films returned from a storage facility. In this 1950 film, BPA engineering teams determine what kind of cable to use and how to string and sag it for optimal high-voltage transmission. It was written by Henry Alderman of BPA’s Information Service, who also wrote “Power Builds Ships” (1942), which was featured in the first collection. The filmmakers use voice-over narration, animation, paintings, models, mathematics, slide rules and custom templates to illustrate the decision-making process. “Stringing and Sagging” also shows the complex tasks involved in installing cable in the field. It's amazing to see the engineering expertise behind the construction of BPA’s unique and modern transmission system, particularly without the aid of computers. The digital transfer was made from an original 16 mm color film print. Learn about other BPA films at: www.bpa.gov/goto/Films.

[@charlessmith6412]

As a retired engineer, I found it interesting to note that they were using slide rules to perform their calculations. Things have obviously changed since then.

[@Bradthacker46]

I'll never look at transmission lines the same way anymore. So much planning involved in this!

[@EphemeralProductions]

I live in a Bonnevile Power area, and there's still TONS of electrical towers that look just like the one at 14:35. LOL They'll probably never be replaced. (They are steel, after all. :))

[@johnkulpowich5260]

Been in the electrical field over 50 years. Really enjoy the video. Thanks

[@goaheadskinit]

Wow! I'm so glad I found this. Amazing.

[@adziyantijuantie8541]

Excellent video and easy to understand .

[@hemanthhariharan5105]

Great educational video!

[@gohanesian2649]

Excellent video. Great tool to use to explain to interns and new hires to Overhead Transmission Engineering. I wish I had this to use as part of the training. It also helps to bridge the gap in understanding some of the documentation of the existing lines that are replaced, refurbished, reconductored or relocated and now, how PLSCADD is used and applied. It is important to be able to understand the existing structures and conductor and the loading criteria of the existing transmission line if making modifications. Sometimes the documentation does not exist and engineers need to know the vintage and type of materials and codes used at the time before making changes. Thank you for finding this movie and publishing!

[@jimrawls5509]

This was like a time capsule.

[@toddmalm7509]

Very interesting. we are all grateful for these men. we have it easy now in our trade compared to them. we do it hot now but imagine doing rod like that or pulling wire like that.

[@EphemeralProductions]

I'm sure many of this is still in place and applies today. Very interesting and informing video. I likes! :)

[@DoNotEatPoo]

Watching this after Hurricane IDA for DiY fixing the downed transmission lines in Louisiana.

[@45422]

Outstanding.

[@Captionmarvelous]

Those guys had titanium balls!

[@joysuryadutta2306]

outstanding explanation

[@barski1960thomas]

Excellent!

[@kurtgoodwin9490]

awesome flashbook

[@thoriumriver]

Very interesting!

[@JoriMMs6]

The only diference in the constructive process is that we used more advance machines (not tractors or trucks) in the stringin and sagging process, apart of that, the methods are the same as 70 years ago

[@richardkapolyo-gn4km]

Nice ❤

[@mackpines]

Awesome video! Always wondered what those towers were called when they change direction.

[@aaronc2]

Hi, The project management quality considerations are cost, distance, amount of resources, utilization rate, and resource ability. Interestingly time is not considered in this video. Scope is everything but cost. Rate is everything but cost and distance. What would substantially increase the success of these engineering projects? Thanks. God Bless. Aaron

[@neekeshpradhan8957]

wow, a very simple and detailed explanation of Stringing and sagging process. Onto that, do you have any similar videos on the contruction process of the over all transmission line? I couldnt find similar videos in the channel, thank you. BonnevillePower

[@rondavis8566]

Not much PPE. How things have changed.

[@PhilippeSenechal-qd1dh]

Transfer Characteristics (ID versus VGS) for n-channel JFET with VDS = 10 V. DC

[@johnkulpowich5260]

O S H A. Pulling their hair out

[@MrMjym]

i work on transmission line in alberta and new Brunswick love my job now retire

[@nerdysophie]

That explains your account picture...

[@bobshaw4063]

You were a brave guy. You must have had nerves of steel.

[@eminemko1]

Hello Sr¡. Could I ask you what companies did you work for? And maybe a contact to ask for job. thanks in advance¡

[@xxxviii007]

That fingernail though.

[@UQRXD]

[@XXprimetimeKobeXX]

Anyone watching 2020 Bru said corona