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Fryguy 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 Oct 2, 2018 1:57 PM
Construction Lesson (For those interested):
Quote:
Originally Posted by KevinFromTexas (Post 8332507)
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 Oct 2, 2018 5:04 PM
Quote:
Originally Posted by kmack (Post 8332857)
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 Oct 3, 2018 4:02 PM
Quote:
Originally Posted by Fryguy (Post 8333121)
Good information!
In that case, probably up the elevator shaft, kmack?

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

Fryguy 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. :whistle::shrug:

kmack 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 Oct 16, 2018 12:41 PM
Quote:
Originally Posted by kmack (Post 8346274)
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. :tup:

JACKinBeantown Oct 30, 2018 4:06 PM
They erected a big pole today.

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

Txdev Oct 30, 2018 8:37 PM
Quote:
Originally Posted by JACKinBeantown (Post 8362497)
They erected a big pole today.
That's the "tree trunk" shown below that supports the 3rd floor terrace

http://www.lakeflato.com/sites/defau...?itok=FAFpyujT

JACKinBeantown Oct 30, 2018 9:42 PM
Quote:
Originally Posted by Txdev (Post 8362947)
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 Oct 31, 2018 4:08 PM
Is that glass on the other side of the stairwell?

Txdev Oct 31, 2018 10:14 PM
Quote:
Originally Posted by Fryguy (Post 8363895)
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 Oct 31, 2018 10:25 PM
Quote:
Originally Posted by JACKinBeantown (Post 8363033)
I know. I just wanted to use forms of the words "erect" and "big pole" in a sentence.
I officially appreciate this joke.

JACKinBeantown Nov 1, 2018 1:16 AM
Quote:
Originally Posted by Keep-SA-Lame (Post 8364387)
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. :tup:

Fryguy Nov 1, 2018 4:10 AM
Quote:
Originally Posted by Txdev (Post 8364373)
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 Nov 1, 2018 1:55 PM
Quote:
Originally Posted by Fryguy (Post 8364688)
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 Nov 2, 2018 4:41 PM
They just poured the second floor.

Dan In Real Life Nov 2, 2018 6:54 PM
Quote:
Originally Posted by JACKinBeantown (Post 8366182)
They just poured the second floor.
To quote another forum member "like button" :tup:

JACKinBeantown Nov 2, 2018 11:38 PM
Quote:
Originally Posted by Dan In Real Life (Post 8366390)
To quote another forum member "like button" :tup:
(like button)


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