You will hear a lot more about our new Paxis Scaffold in the future on Monolithic.com, but in the meantime I will post some raw video clips.  It’s hard to describe how nice this scaffold is, but with the new drive motors and the 10′ stance, this scaffold makes one of the sturdiest, safest platforms I have ever seen.
  

It has been a very busy couple of weeks for me, and I apologize for not posting these pictures sooner. 

 The new paxis scaffold was a huge success, even though there are a few things that we are going to do differently.  The one thing that we didn’t expect, was that it was so heavy that it started to make some pretty substantial ruts in the ground.  We have been toying around with a few different ideas.  First, I think we will pour a concrete circle in the middle of the dome so that the pivot point and tires have a harder surface to rotate on.  Secondly, I think we will try to find some wider tires for the outside wheels, and change the way the motor is mounted so we have more ground clearance.  

The dome construction went very well.  The foam and rebar hangars were uneventful.  The one thing we did a little differently was hang about a quarter of the steel on the bottom 20′ of the dome, then spray a half inch of concrete.  The reason we sprayed that concrete was to help prevent all of the #6 bars that we had to install on the bottom half, from pulling down on the foam too much.  The weight on the rebar hangars will sometimes cause the rebar hangars to pull away just a little, but it’s enough to make the outside of the dome have pucker marks.  The concrete spraying went well, and the dome looks very nice.

 After we got done spraying the dome, we sprayed the foam on the stem wall.  We started by spraying our Monoform primer onto the wall first, and then spraying two inches of two pound foam.  Now that the dome is done, and the foam is sprayed, we are going to remove our scaffold and let the plumbers and electricians in to do the underground work. 
 Please enjoy the new pictures, and look forward to more blog entries in the future.  

My job at Monolithic has been one of the greatest adventures in my life, and has given me opportunities to participate in many different projects. There is one part of my job that not too many people know about, but that is the job of IT manager.

David has always believed in keeping our office computer systems up to date, and state of the art, and that has definitely contributed to the design, manufacturing, and construction of Monolithic Domes.

Our website is one of our biggest assets. Our website got 6,225,837 hits last month and we hope to keep that number growing everyday.

Our office only uses Apple computers. We have iMacs for our draftsman,  Mac Minis, a beefed up Mac Pro (see video) that has two dual core processors and 16 gb of ram for finite element analysis, MacBooks,  MacBook Pros, and recently a new MacBook Air for my boss David.

All of the computers, except for the laptops, are ran using an xServe that maintains our Directory Services. That means, that most of the computers are just shells, and all our user data comes from one xServe. Well, that xServe is getting very full, so it was my job to figure out our data storage plan for the future. I started by looking at what Apple had to offer, and this is called an xRaid.

The xRaid is a box that can hold up to 14 hard drives, and combine them to make one massive place to store your data. The first thing I looked at was the price, between 6 and 12 thousand dollars, I said its time to look somewhere else.

After looking around at a lot of different options, way too many to post here, I am back to the xRaid. Here’s why: #1 This is a permanent solution. Once we get over the pain of buying the thing, we won’t have to buy anything like it for a long time. When we need more space, we just go drop in another drive. #2 The xRaid is built to last. The xRaid has two power supplies, two cooling systems, and can be implemented with any kind of raid that you want, so even if do lose a drive, you will not lose data. #3 Apple’s Drive Modules. I was very surprised to learn that Apple’s drives go through 350 hours of testing vs. the 5 minutes for regular drives. Their drives also have a .02% failure rate vs. the 20% failure rate of an off the shelf drive. #4 It is completely manageable by remote. Which in my job is important, since I am out on the site half the time.

*The xRaid also works very well in Windows, Linux, and even mixed environments.

So Mike, where do you learn all this stuff? Well, my brother Dave is the person who continues to teach me, and he has pointed me to another place. We have been buying all of our equipment through a company called Expercom. My favorite thing about Expercom, is that when you have troubles or need advice, they are right there to help.  They have a wonderful customer service department and have literally saved us thousands of dollars on computer equipment.

Now that we have used our new polar scaffold for a couple of weeks, we have reports from the crew that the motor is still running a little slow. So, this is what we’ve done.

* The drive unit is 220v single phase, and puts out 220v three phase. So it should work on any jobsite.

Just in case you haven’t read the first article, we are switching from the single phase to three phase powered drive system so that we can have adjustable speeds. The longer the scaffold, the longer it takes for one rotation. For instance, spraying consistent concrete at the end of the scaffold might be just the right speed, but spraying towards the middle will be a lot harder with the slower speeds.

The biggest difference is the drive. The original drive that we used had most of the same features that the new one does, except the ability to drive more power to the motor. The new MD-65 has the ability to increase the frequency of the power. So instead of adjusting the power from 40 hertz to 60 hertz, we are able to go from 40Hz to 120 Hz. I use the number 40 Hz for the minimum, because if the motor turned much slower than that, the motor wouldn’t be able to cool itself. I adjusted the drive to 120Hz for the highest setting, because I was concerned that any faster, and we might have to install seat belts on the scaffold.

The only remaining worry is that the increase in speed will decrease the power.  Enabling its ability to climb over objects like pipes and rocks in the dome, but I think we have overcome that with the powerful new drive motor. Javier is going to take this scaffold motor with him on Monday, and I will post a report on its progress. Thanks for reading.

Related Links:

• The original Paxis Scaffold
• Post: The New Paxis Scaffold
• Reliance Motors
• Monolithic.com
• Starting a Monolithic Dome Building Company
• Gallery of Images

After an extremely windy day of attaching the airform yesterday, Javier and his crew had the dome ready to inflate by the next morning.  This church is using a copper colored airform that looks great with the limestone colored stem wall.  We started the inflation at 9:30, and at 9:40 it was all done.  Father George and a handful of the parishioners came out to see the dome inflate. 

 In the picture gallery you will notice the dome has kind of an egg shape.  On the next pictures, you will see the dome round out a lot more.  Patterning the airforms is something that has taken us a lot of years to perfect, and it is interesting how we have to pattern them in a weird shape, so that when it’s been inflated for a day and done stretching, it will be the desired shape.

Now that the dome is inflated, Javier is going to finish building our new Paxis Scaffold.  The next step is to mask off the uprights.  The uprights are the pieces of rebar that extend from the wall, and will be tied into the dome’s structural steel.  Once the steel is in place, and the electrical is installed into the shell, then we can start spraying concrete.  We expect to start spraying foam on Friday.   You can see more pictures of the inflation here.