Tag: Union Carpenter

Some of the Men and Women of The Ohio River Bridges Project

Posted on by Nick Roberts

Today’s post is a gallery of photos of some of the men and women of the Ohio River Bridges Project. As I go around the Ohio River Bridges Project I meet and talk with so many fine men and women who perform the arduous work of Heavy Highway and Bridge Construction.

Watching them work is a real eyeopener to the skills and strength they must bring to their work. One thing that really strikes home with me is how little complaining I hear. Everyone of them seems genuinely happy to be a part of such a historic project; many of them comment about the pride they feel to be involved. The work they are doing will change the face of Louisville and forever be a testament to their labors. I’m very fortunate to be able to share this historic project with them and thank each and every one of them for the kindness they show me as I go about my work too.

Click on any image to open a slideshow of today’s images.

Carpenters Working On Concrete Forms (Gallery)

Posted on by Nick Roberts

The images in this gallery are of the Carpenters working on concrete forms on the Indiana Approach for the Downtown Span of the Ohio River Bridges Project. The carpenters are installing cooling lines that will carry water from the river through the concrete after it sets in order to keep it from overheating as it cures. Concrete cures due to a catalytic reaction between the cement and other chemicals in the mixture. If the concrete overheats during the curing process it may not be strong enough to do it’s job which is why it is crucial that some way to transfer the heat from curing out of the mass of material.

I processed the full color versions of these images using Adobe Camera Raw using a series of steps that i learned from reading Scot Kelby’s book on using Photoshop CS5. Rather than use my usual method of creating HDR images from three frame bracket sets I instead decided to work with the “normal” exposure alone and see what I could accomplish using ACR.

After creating the color images I decided to use [thirstylink linkid=”13827″ linktext=”Topaz” class=”thirstylink” title=”Topaz”] B&W Effects to produce versions that have an antique feel to them. I used various adjustments to create my own preset that desaturated the colors and added a vignette of faded edges. I then applied a border from Topaz that I thought fit the idea I had for the final images. I saved this preset to use later on other images that may benefit from similar treatment.

Click on any of the images to open a lightbox and slideshow of all these images.

 

HDR Photos of Progress on the Ohio River Bridge North Tower

Posted on by Nick Roberts

Click on the image to enlarge it in a separate window.

North tower, R-5, base with Ironworkers climbing and tying rebar. Sunny, cloudless, day with 3 people visible on scaffolding.
Going Up

The Ironworkers and Carpenters have been very busy over the winter and the North Tower of the Downtown Span is progressing well. In this first image you can see the tower base as it stands today. The Ironworkers are tying the rebar for the next section and as soon as that is done the Carpenters will form that section for the next concrete pour.

I regret that I was under the weather for the first two months of this year and unable to get out to the Ohio River Bridges project very often. In looking back at the images from the end of 2013 I can see that there has been a great deal of progress. I’m back on the job now and will be posting on a regular basis as I did throughout the end of summer and into fall.

All of these images today are HDR images processed in NIK HDR Efex Pro 2 and Aperture 3. As is my standard practice I shot everything handheld in three frame bracket sets of +2, 0 and -2 EV exposures. I applied 60% anti-ghosting during the merging of these three exposures and used the Balanced Preset as my starting point. After merging them and applying the preset I went back into the tone mapping settings and changed the Detail slider to Accentuated and the Drama slider to Deep. That is all I did in NIK HDR Efex Pro 2 before returning the merged file to Aperture 3 where I adjusted the color channels, sharpening, contrast and applied a small vignette.

HDR photo of Four Ironworkers on North Tower landing supplies
Four Ironworkers on North Tower landing supplies. HDR image

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In this image the Ironworkers are working with the crane Operator to lift more materials onto the tower scaffolding. They have to communicate with the Crane Operator using hand signals and radios to safely manage material transfers. I am always amazed at the skill of these crane operators to place everything from a small bundle of steel reinforcing to massive concrete forms on the job with pinpoint accuracy.

HDR Photo of Carpenters Removing the concrete form from the eastern base of the North Tower #2
HDR Photo of Carpenters Removing the concrete form from the eastern base of the North Tower #2

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In this HDR image the concrete form is being removed from the angled surface of the eastern side of the eastern pier of the North Tower. The carpenters have unbolted it and rigged it for the crane Operator to lift it and transfer it to a waiting barge until it is needed again. Seeing the Carpenters alongside these forms gives scale to their size. Once again the Crane Operator and the Carpenters are working through radio and hand signals to safely move this massive piece of concrete form.

HDR Photo of Carpenters Removing the concrete form from the eastern base of the North Tower #1
HDR Photo of Carpenters Removing the concrete form from the eastern base of the North Tower #1

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For this HDR image I chose to shoot the removal of the concrete form in a vertical format to better capture the cranes and the upward momentum that the project exudes as it progresses.

HDR photo of the North Tower Bases and Cranes
HDR photo of the North Tower Bases and Cranes

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This HDR image shows both bases for the North Towers of the Ohio River Bridges Project Downtown Span. The progress that is being made really comes out in this HDR photo. The concrete forms have been removed from the base of the western side of the towers and scaffolding is surrounding the transition point as the base morphs into it final cylindrical shape which will be approximately 150 feet in the air when it is completed.

HDR Photo of The North Tower Base Cooling Manifold Lift
HDR Photo of The North Tower Base Cooling Manifold Being Lifted Into Place

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This HDR image shows a cooling manifold being lifted into place. It is used to distribute cooling water through the concrete as it cures. When concrete cures there is a lot of heat inside it; this is due to the catalytic reaction of the materials that are used to make concrete. Without cooling this reaction would cause the concrete to overheat and lose it’s strength. The cooling process goes on until sensors built into the structure provide the information to show that it is safe to stop cooling the concrete and allow it to finish curing.

I’m really glad to get back to shooting the Ohio River Bridges Project and posting my work again. I hope that small hiccup at the beginning of the year won’t be repeated and I can complete my project of documenting the Ohio River Bridges Project and the men and women who are doing it.

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.