Tag: International Association of Bridge Structural Ornamental and Reinforcing Iron Workers

Lowering the Caisson into the Pier Casing

Posted on by Nick Roberts
Lowering the Caisson into the Casing.
Lowering the Caisson into the Casing.

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This HDR image shows the 60 foot long caisson as it is being guided, by the Ironworkers and Carpenters, into place inside the pier casing. After placing the caisson the next step will be to fill the pier with concrete. The steel casing sits on the river bottom and then the caisson fits into a rock socket has been bored 30 feet below the casing into the bedrock of the river bottom. This makes the total length on the pier nearly 60 feet from the surface to the base. The iron cylinder is there to both guide the drill during drilling and to form a protective shell for the pier once the bridge is built.

This image is from a three frame bracket set using -2, 0 and +2 EV settings. I merged the bracket set in NIK HDR Efex Pro 2 and because the workers were moving quite a bit I had to apply 80% anti-ghosting to isolate them and remove the ghosts of their arm movement. After merging and some mild tone-mapping in NIK HDR Efex Pro 2 I returned the merged file to Aperture 3 where I completed my processing by adjusting contrast, alignment, sharpening and the individual color channels to achieve the look I wanted for the final image.

Caisson Pick

Posted on by Nick Roberts
Lifting the Caisson Into Place
Moving the Caisson Into Place

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Yesterday morning the caisson for the bridge pier, 6R2, was moved into place inside the 12 foot diameter steel casing that will protect the bridge piers from damage once the bridge is finished and the river channel is reopened. The rebar caisson is over 60 feet long and moving it requires excellent coordination between the crane operator and the crew on the ground. The caisson must be precisely placed so that the connections to the next components of the tower can be completed. Not only are there Ironworkers involved but additionally there are Carpenters, Pile Drivers and Surveyors that have specific roles to play when these caissons are positioned. The men in the foreground are surveyors whose role is to make sure that the attachment points are properly aligned by accurately measuring exactly where the caisson is situated in the bore. Once all that is completed the cylinder will be poured full of concrete and the pier will be ready for the next piece to be attached.

This is a three frame bracket set of images shot at -2, 0 and +2 EV. The three images were merged in NIK HDR Efex Pro 2 to create the HDR image. After merging and tonemapping the image was returned to Aperture 3 for final processing.

Foggy Morning on the River Crossing Project

Posted on by Nick Roberts
Ironworker #2
Loading Steel Onto The Construction Barge.

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Yesterday morning the Ironworkers were loading more steel onto the barge they are building the caisson on. The caisson is the internal reinforcement for the bridge pier which will be lowered into the steel casing before the concrete is poured. The size and amount of steel that goes into one of these caissons is incredible. The horizontal elements in this caisson are at least two inches in diameter while the rings around it are close to one inch in diameter. Loading the steel onto the barge is a very controlled process that requires coordination among the ironworkers on the barge and the crane operator to accomplish safely and efficiently. The man in the photo is communicating with hand signals to the crane operator to lower the load onto the steel beams that will support it while it is on the barge deck.

I processed this image from a single frame using Topaz Clarity to reveal the colors in the scene and to show the river fog engulfing the Kennedy Bridge in the background. I find Topaz Clarity to be very good at allowing me to control the contrast and colors in an image while avoiding halos and artifacts that sometimes occur within these types of images. After applying the Topaz Clarity adjustment I returned the image to Aperture 3 where I adjusted the sharpening and applied a small vignette.

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Ironworkers

Posted on by Nick Roberts
Ironworkers Assembling an Iron Framework for a Bridge Pier.
Ironworkers Assembling an Iron Framework for a Bridge Pier.

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This shot is looking east with the Big Four Bridge in the background. The iron structure the ironworkers are building will be placed inside one of the steel cylinders that are in the righthand side of the image. There is a completed one on the barge behind the one where they are working. The hexagonal piece on the end is a jig to align the steel rebar while they assemble it.

This image is a single frame that was edited in Aperture 3 and Topaz Adjust. I wanted to capture the early morning fog and the light as the sun was coming up. The early morning on the river is a peaceful quiet time before the sun gets up in the sky and the temperature starts rising.

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Here’s a link to their site:

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Ironworkers

Posted on by Nick Roberts
Dean Tharp, President of Ironworkers Local 70 at groundbreaking ceremony for the Louisville, KY downtown bridge project.
Dean Tharp, President of Ironworkers Local 70 at Groundbreaking Ceremony for Louisville Downtown Bridge.

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This series of images of Ironworkers is from the official Groundbreaking for the Downtown Span of the Louisville Bridges Project. After over twenty years of planning, revisions and indecision the new bridge to carry traffic over the Ohio River is finally underway. With a completion date of 2016 this is going to be a very intense and fast paced construction project. Not only will there be two new Ohio River Bridges built, one on the east end of Louisville connecting I-265 in Kentucky to I-265 in Indiana, there will be over 29 additional spans in the area known as “Spaghetti Junction” to connect the converging interstate highways of I-71, I-64 and I-65 to the new Ohio River Span.

I have decided to create a project that will focus not only on the bridge construction itself but more importantly on the skilled trades and laborers who will do the actual work of building the bridge and the many other structures that will be needed to see the project to completion. My goal with this endeavor will be to memorialize the contribution of the men and women whose hands are on the tools and give them a place in the history of this project. I hope to give faces and names to those who are making history and to leave behind a testament to them that their families and friends can go to to see them as they were building these bridges.

The first image today is of Dean Tharp the President of Ironworkers Local 70 as he and several other members attended the official groundbreaking ceremony. It is from a three frame bracket set of -2, 0 and +2 EV merged in NIK HDR Efex Pro 2 and finished in Aperture 3. I especially like the way the safety vests and t-shirts create a strong visual component in the composition as well as the detail of Dean’s tools which are the hallmark of Ironworkers everywhere. I also find the guy in the safety green shirt interesting because he is looking into the camera and is the only construction worker in safety green in the image. I think his posture and presence gives an added element to the overall composition.

Ironworker Local 70 members at official Groundbreaking for Downtown Bridge Louisville KY.
Ironworkers #1

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This second image is a single frame of the three frame bracket set I was shooting that day.  I chose to process it as a single frame because there was too much movement by the people in the scene for the anti-ghosting feature of NIK HDR Efex Pro 2 to resolve. I used the underexposed frame of +2 EV because it gave the best rendering of the clouds and because there was plenty of light in the shadows to be able to show the detail there too. I used Aperture 3 exclusively to process the image adjusting the individual color channels to achieve the level of saturation and luminance I wanted in the final image.

Dean Tharp President of Ironworkers Local 70 at Downtown Bridge Groundbreaking Ceremony
Confidence 

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This image of Dean Tharp is another single frame processed in Aperture 3 using the same techniques as the previous image.