Monday, July 29, 2013

Progress In Every Direction

At the top of my to-do list today was to check the progress on the east side.  I suspected it was close to receiving the final lift pour.  Jacobsen's crew was working hard here.
My camera zoomed in to see the sealant between the forms and the building.  Notice the space around the I-beams at the top of the piers so they can be removed.
We have all noticed that the support for the east towers is different than for the west towers.  I have been told that the support for these two towers will be cantilevered and that the piers will be cut away.  If you look closely in the center of this photo, above the red tape around the post, you can see a gasket where the concrete will be poured under pressure.
A gasket can be seen in this photo, also in the center.  You can also see wires protecting the men from a fall.  Notice the knee pads, steel-toed boots and 60 pound tool belts.  The good news was that this afternoon the east side was in the shade.
Of course, as soon as I got home, the construction cam showed that the concrete pump had arrived and is pouring on the east side.  This is great news!
The east side, on the left, will soon join the north side in having a complete foundation.
Mr. Drill Rig has been busy placing micropiles.  They are all over the north lot between the cement slab for the annex and the tabernacle, including right next to the building, but a line of them can easily be seen on the right.  By the way, this machine is operated by remote control -- there is no cab for a driver.  Also, notice the men in the background placing the waterproof membrane on another section of the west slab.
Form work on the west and south sides progresses.  If you haven't noticed before, now would be a good time to see the difference between the tower foundations on this side versus the east side.
I was delighted to see that the wide-flange vertical columns were cut away this morning.  Concrete fill has been added daily to reach the current ground level.
The fill makes for a nice working area and is now on all sides.  If you look closely on the right side of this foundation, you can see the entrance from the north lot into the basement.  It's between the piers under the southeast tower, but you are actually seeing through the building in the light of the west sun. 
Perhaps a close-up is necessary.
The clean space about four feet above the concrete fill is where the lower slab of the underground parking lot will meet the tabernacle.  The area on the left will be a stairwell from the lowest level of the basement, which is now out of our view. 
I hope Mr. Track Hoe knows what he's doing.  He has stranded himself while playing King of the Hill.  As the south lot deepens, the red machine on the right drills tie-backs into the barrier wall.
Surgery continues on the southwest tower cap. 
I'm encouraged.  I think he's going to make it!


David said...

Ahhh...a Cantilever! Now it makes sense. For those that have no idea what a cantilever is (I didn't), take a look at this description as well as picture examples of common cantilevers that we see all the time:

Julie Markham said...

Thanks for the link. My husband has tried in vain to explain this to me since I learned this. I need to see how the cantilever actually works, and of course I'll document it for all of us. But I'm glad this explanation was helpful to you.

Kevin said...

The best local example of a cantilever would be the 3rd floor of the Provo Temple. Ever wonder how it hangs out in thin air like that. It's cantilevered :)

Julie Markham said...

I've never wondered before. I'm starting to understand. Thanks!

Unknown said...

While I understand the principle behind cantilevers, I'm at a loss as to why this approach was chosen for the two east corners of the PCCT rather than simply using footings and foundation walls as with the remainder of the Temple. I'm sure there's a very good reason, but it certainly isn't obvious to the casual observer. In your earliest shots of the NE corner excavation it appears there's a very large rock shelf in this vicinity, and I'm wondering it this has something to do with the choice to go with cantilevers on the east. I look forward to learning as we go. Good job!

Julie Markham said...

I'm with Lane, and while I know what I was told, I'm wondering if it was accurate. However, these are the two east towers we are talking about, and it will be very easy to watch this, so I will.

LSManning said...

It's really not a 60-lb "tool" belt. It's a safety harness. Each man clips onto the steel cable. Should a person fall, the harness holds them to the steel cable, preventing injury.

Julie Markham said...

I'm seeing that harness, but I'm also seeing what looks like a very heavy tool belt. Every workman has one. Just more weight for that harness to hold up safely if someone should fall...