monumental sculpture

LVA Open Studio Weekend is this Weekend by Mike McCarthy

If you are in Louisville this weekend (November 4th and 5th), come by my studio and say hello! I am participating in the 2017 LVA Open Studio Weekend, a fundraiser for the Louisville arts community. I will have a lot of work there ant it will all be at a special studio sale price. You can also see the progress I have made on "Cor Liberum", my commission for Norton Hospital. You can stand next to the pieces and get the feel for how big this piece really is. I will have special pricing on Limestone carving blanks as well.

My studio is located at:

1807 Cargo Ct.

Louisville, KY 40299

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Progress Time Lapse of the Large Figure of "Cor Liberum" by Mike McCarthy

Here is a short time lapse to show the progress on the large Figure of "Cor Liberum". She has lost about 7000 pounds and is finally starting to take shape.

More Progress on "Cor Liberum" by Mike McCarthy

Removing this 3300 pound chunk of Indiana Limestone from the big figure of "Cor Liberum", my Norton Hospital commission, made a big difference. I ordered the stone a little larger than needed. I was moving along ok, but wanted to move a little quicker. I used a hammer drill and feathers and wedges to split out a large piece of stone. Splitting it out is one thing, removing it afterwards is another. One of my favorite tools is the pry bar I am using in the video to get room to slide my straps under the stone. Then the gantry makes small work of a big job.

My New Gantry Crane is Set Up and Ready to Go by Mike McCarthy

I have a shop made gantry crane that I have been using to move some of the smaller pieces of stone around the studio. However, I do not trust it with more than 3000 pounds. That is not going to get it with the two blocks sitting under the crane in the picture below. They both started out at 17000 pounds. They will become the central figures of my Norton commission, "Cor Liberum". Once I get more of the off fall off what is now the tops of the stone, I will need to stand them up to be sure they fit together just so. This is critical to the success of the piece. The central negative space that they create forms a heart. The only way to be sure they actually do that is by setting them up and making sure!

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"Cor Liberum" - The Little Figure Goes on a Crash Diet by Mike McCarthy

I love the whole sculpture process. However, there are some moments that are just a little more fun than others. One of those is when you are splitting off a large section of stone from the main body. Last night, I was working on the smaller figure for my Norton commission. The stone came in at 8' long. The small figure is only going to be a little over 5'. So, I had a lot of stone to remove. This video shows how I used a drill and feathers and wedges to get rid of 2000 pounds of stone in about an hour.

Using Feathers and Wedges to Remove a 1000 Pound Piece from the Original Block by Mike McCarthy

A set of feathers and wedges

A set of feathers and wedges

Force is an amazing thing! That force is the basic principle applied when using Feathers and Wedges to split stone. The three piece tool set applies force by hammering the tapered wedge between two feathers that have the opposite taper. Simply drill a hole, insert the feathers and pound in the wedge. The force will literally split the stone in a linear 

The feathers and wedges inserted in the drill holes.

The feathers and wedges inserted in the drill holes.

 

Now for the trick. For those who have used the feathers and wedges, you will probably agree that trying to cut a square or rectangle out of a larger block while maintaining a 90 degree cut from the larger block is difficult. Most of the time it will break in a 1/4 moon shape as opposed to the 90 degree break. That is why I am so happy with the break I got tonight. It broke just the way I planned!

The split rock moved out with a pry bar a little to give room for the slings.

The split rock moved out with a pry bar a little to give room for the slings.

The block removed with a gantry crane.

The block removed with a gantry crane.

The block sitting on another cut clock.

The block sitting on another cut clock.

I over drilled the vertical surface so that there was much less holding it in place. I also used a 3' drill bit to drill the majority of the way through the block. I then went to the other side and did the same thing there. While I was drilling, I started applying the feathers and wedges without pounding them in too hard. This allowed a longer period of force to be applied to the stone, I gradually moved along the drill holes to apply more and more force without working too fast. It worked!

Progress on the Fourth of Five Birds for "Cor Liberum" by Mike McCarthy

"Cor Liberum" was slow to get started, but I am already working on the fourth of the five birds for the sculpture. This one is one of the smaller birds (one of the three on the tallest posts). It is split, cut to its rough outline, and now I am refining the shapes. I am still using a diamond blade at this time but will soon  move to the air hammer. It then has to get flipped and the bottom side shaped. I will then switch back to a grinder with sanding disks.

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Splitting a Block of Indiana Limestone using Feathers and Wedges by Mike McCarthy

I have always found the process of using Feathers and Wedges to split a stone so fascinating. I think it is the coolest thing that the force these small tools provide is enough to split stone. More importantly, the fact that you can somewhat shape the stone through the placement of the holes is even more amazing.

In this short video, you will see about 20 minutes of work condensed to a little over 1 minute. While 20 minutes may seem like a long time, it reduces this 4' x 4' x 1' block by 1/4 and shapes the end of the tail of one of my birds for "Cir Liberum"

Enjoy!