SAN ANTONIO | Canopy by Hilton Hotel | 247 FT | 24 FLOORS │ U/C - Page 17

Fryguy · #**321** Posted **Oct 2, 2018, 5:30 AM**

Well, given that it is a highrise, it will need to have a pump within the building similar to what the new Frost Tower had and what the Thompson Arts Hotel and Condo currently has. It takes a lot of work to get the concrete up those several feet I am just wondering, given the small foot print, where they may put it. It does take up some room, and considering the limited space, it is interesting.

kmack · #**322** Posted **Oct 2, 2018, 1:57 PM**

Construction Lesson (For those interested):

Quote:

Originally Posted by KevinFromTexas

One kind allows them to place it anywhere on or within (on top of) the building, while the 2nd kind is on a large truck

Yes, there are two types: truck-mounted, and what is called a placing boom. But in reality, they are both the same.

A 61 meter pump truck can reach a good 6-stories up (or more) and still be able to span across the floor in order to make a pour.
Example: http://www.pumppartners.com/documents/61m.pdf

Once you get above a certain height though, a truck mounted pump just becomes inefficient in its pumping reach. This is when a placing boom comes into play. (Although, if not going much higher, some companies will employ a hose system that is attached to the end of the boom and is manually dragged across the pour area - by hand.)

Once a placing boom is needed, they basically just take the boom portion off of a truck and mount it in the building. That's the part where both systems are the same. The truck stays on the ground and is connected to a hard pipe system that runs up the center of the building. The placing boom is relocated after each floor and additional pipe sections are added to increase the height.

Class dismissed, don't forget about the pop-quiz tomorrow morning!

Fryguy · #**323** Posted **Oct 2, 2018, 5:04 PM**

Quote:

Originally Posted by kmack

Construction Lesson (For those interested):

Yes, there are two types: truck-mounted, and what is called a placing boom. But in reality, they are both the same.

A 61 meter pump truck can reach a good 6-stories up (or more) and still be able to span across the floor in order to make a pour.
Example: http://www.pumppartners.com/documents/61m.pdf

Once you get above a certain height though, a truck mounted pump just becomes inefficient in its pumping reach. This is when a placing boom comes into play. (Although, if not going much higher, some companies will employ a hose system that is attached to the end of the boom and is manually dragged across the pour area - by hand.)

Once a placing boom is needed, they basically just take the boom portion off of a truck and mount it in the building. That's the part where both systems are the same. The truck stays on the ground and is connected to a hard pipe system that runs up the center of the building. The placing boom is relocated after each floor and additional pipe sections are added to increase the height.

Class dismissed, don't forget about the pop-quiz tomorrow morning!

Good information!

And will it be multiple choice?

Txdev · #**324** Posted **Oct 3, 2018, 4:02 PM**

Quote:

Originally Posted by Fryguy

Good information!

In that case, probably up the elevator shaft, kmack?

kmack · #**325** Posted **Oct 3, 2018, 7:36 PM**

Possibly...but mounting locations can be of a wide variety:
- elevator shaft
- up to 5' square opening on it's own - self climbing (openings poured back later)
- mounted on pedestal outside bldg footprint (like some tower cranes)
- wall mounted
- freestanding on the deck floor (smaller placing booms)

Although I've never seen one in an elevator shaft, it would depend on how quickly the elevator sub wants to get started on his work.

Reference material: http://www.awagnerco.com/wp-content/...lacingBoom.pdf

Lots of info people really didn't want to know about...

(but it's been my forte since mid-90's: rebar & concrete work)

Fryguy · #**326** Posted **Oct 13, 2018, 2:30 PM**

So, they filled that big hole that was on site this morning with a bunch of concrete. However, I am kind of interested as to why they had to create such a big hole only to fill it with a significant amount of concrete.

kmack · #**327** Posted **Oct 15, 2018, 3:07 PM**

The hole appeared to be for some sort of excavation up to the building slab. And since they didn't put any Finishers on the concrete, I would guess it was just some filler for the hole. Most likely a grout mix instead of normal strength concrete. If that is the case, then the grout will be more stable than dirt fill and could have even been cheaper than bringing "select fill" back to the site and having to deal with compaction requirements/issues.

Fryguy · #**328** Posted **Oct 16, 2018, 12:41 PM**

Quote:

Originally Posted by kmack

The hole appeared to be for some sort of excavation up to the building slab. And since they didn't put any Finishers on the concrete, I would guess it was just some filler for the hole. Most likely a grout mix instead of normal strength concrete. If that is the case, then the grout will be more stable than dirt fill and could have even been cheaper than bringing "select fill" back to the site and having to deal with compaction requirements/issues.

Thanks for the information.

JACKinBeantown · #**329** Posted **Oct 30, 2018, 4:06 PM**

They erected a big pole today.

https://app.oxblue.com/open/sundt/hiltoncanopy

Txdev · #**330** Posted **Oct 30, 2018, 8:37 PM**

Quote:

Originally Posted by JACKinBeantown

They erected a big pole today.

That's the "tree trunk" shown below that supports the 3rd floor terrace

JACKinBeantown · #**331** Posted **Oct 30, 2018, 9:42 PM**

Quote:

Originally Posted by Txdev

That's the "tree trunk" shown below that supports the 3rd floor terrace

I know. I just wanted to use forms of the words "erect" and "big pole" in a sentence.

Fryguy · #**332** Posted **Oct 31, 2018, 4:08 PM**

Is that glass on the other side of the stairwell?

Txdev · #**333** Posted **Oct 31, 2018, 10:14 PM**

Quote:

Originally Posted by Fryguy

Is that glass on the other side of the stairwell?

No, requires a fire barrier, so that is just exposed poured concrete sheer wall. The elevator bank is behind that.

Keep-SA-Lame · #**334** Posted **Oct 31, 2018, 10:25 PM**

Quote:

Originally Posted by JACKinBeantown

I know. I just wanted to use forms of the words "erect" and "big pole" in a sentence.

I officially appreciate this joke.

JACKinBeantown · #**335** Posted **Nov 1, 2018, 1:16 AM**

Quote:

Originally Posted by Keep-SA-Lame

I officially appreciate this joke.

Thank you. I'm currently doing a series of shows in Boston. I also throw in the occasional fart joke.

Fryguy · #**336** Posted **Nov 1, 2018, 4:10 AM**

Quote:

Originally Posted by Txdev

No, requires a fire barrier, so that is just exposed poured concrete sheer wall. The elevator bank is behind that.

No. I mean the area to the far left of the picture.

Txdev · #**337** Posted **Nov 1, 2018, 1:55 PM**

Quote:

Originally Posted by Fryguy

No. I mean the area to the far left of the picture.

Oh, yes, the rendering shows a ribbon of glass wrapping around SW corner. I think that may no longer be there, but i’ll check.

JACKinBeantown · #**338** Posted **Nov 2, 2018, 4:41 PM**

They just poured the second floor.

Dan In Real Life · #**339** Posted **Nov 2, 2018, 6:54 PM**

Quote:

Originally Posted by JACKinBeantown

They just poured the second floor.

To quote another forum member "like button"

JACKinBeantown · #**340** Posted **Nov 2, 2018, 11:38 PM**

Quote:

Originally Posted by Dan In Real Life

To quote another forum member "like button"

(like button)