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Hazina Trade Centre -39 floors
mwekez@ji
#21 Posted : Monday, July 15, 2013 9:14:28 AM
Rank: Chief


Joined: 5/31/2011
Posts: 5,121
Chinese firm beats Kenyan developer to NSSF's Hazina tower deal http://www.businessdailyafrica..../-/11aqxwcz/-/index.html
Modoh
#22 Posted : Monday, July 15, 2013 10:29:43 AM
Rank: Member


Joined: 12/9/2008
Posts: 43
@Kaigangio...that was quite a good read
Msafara wa mamba burukenge hawakosi![/b]
Kaigangio
#23 Posted : Monday, July 15, 2013 10:50:13 AM
Rank: Elder


Joined: 2/27/2007
Posts: 2,768
Pesa Nane wrote:
Kaigangio wrote:
Kihangeri wrote:
Rankaz13 wrote:


I recall when the existing building was being built and I was in college hapo UoN. There were all these rumors flying around that the building was supposed to be taller than KICC. I was actually surprised they stopped at the existing 8 floors. Perhaps the rumors were true after all.


The foundation for the building was for almost 50 stories high. However, the government of the day decided to munch the difference of 50 minus 8 and the preceeds from NSSF were said to have been spent well.

To be sure, count how many underground parking levels exist in the building.Heavy digging machines looked like toys when the open cast mine was being dug. I worked there for some time.Thus my ...


@ kihangeri...what you are telling us is not true...how long did you work there anyway?

A little insight...

The contract for NSSF Office block between Mokhta Daddah and Monrovia Street as it was originaly known was commissioned to Mruttu Salmann Associates (architects), Abdul Mullick Associates (Structural Civil engineers), Tana & Associates (Quantity Surveyors) and Kisa & Partners Cons. Engineers (Services Engineers). The architectural concept of the building depicted a maasai holding two shields...

This was commissioned together at the same time with the NSSF Embakasi housing, NSSF Mountain View Housing and little known NSSF Karen Housing (White elephant) way back in 1994 when Muindi was the Managing Trustee and NSSF was liquid.

The construction contract for the Office block was awarded in 1997 to one Mavji Construction limited at a tender sum of kshs 3.8 Billion if i remember well...The building consisted of 4 basements parking to accommodate 375 vehicles, Ground floor (nowadays they park more than 500), mezzanine 1 & 2, 31 typical office floors, Lift machines floor, communication masts floor and heliport....

The excavations at some point had to be precisionally controlled because it started generating some problems to the nearby buildings, (read nginyo towers and others) which started developing cracks...

At a depth of 18m below the surface another big challenge arose...The geological tests carried out in the entire area covered by the block showed that the rock here could not carry the weight of the building...besides that, there was evidence of an underground stream directly below which explained why the contractor spent so much time and big pumps pumping out the water pooling from underground and spreading in the huge pit. So what to do...The building raft was redesigned and piles (underground columns) were introduced...

To stabilise the base it took 600 piles distributed over the area ranging in diameter sizes 900mm on the tower side and 600mm in the mid sections and 300mm towards the monrovia road side. Again the raft depths were uneven. The depth of raft on the tower side was a whooping 3.8m!!!...and it varied from various random section to a minimum depth of 1.8m near the monrovia road side...The variation attributed to piles introduction and raft changes was about kshs 0.5 billion (about 12% of the tender sum)...

The concrete pouring for the raft was sub-contracted to Mugoya which was the only construction company that could manage the concrete pours of such magnitude...They had a large fleet of concrete mixer/pumps trucks...About 20,000 cubic metre of concrete went into the raft!!!

At around 1999 NSSF was almost going bankrupt having awarded mega projects and making huge payments...NSSF embakasi housing (kshs 6 billion), NSSF Office Block (kshs 3.8 billion), NSSF Mountain view (kshs kshs 900 million), NSSF Karen housing (Not sure but nearly kshs 2 billion) these figures being contract awarded tender sums....of course 2 years later the variations were huge...Note also the contracts were awarded during an election period and lots of money was needed for the campaign...the cash cow...NSSF!!

The project had to be scaled down and the construction was to reach water tanks floor level...At this level it was projected that the project would cost about kshs 2.8 Billion based on the tendered rates and other unmeasured and concealed works...


Boss, what formula are you using??

Volume = Area X Height
Area = Pie X r X r

Assuming the worst case scenario of 600 piles of 900 mm diameter and a height of 3.8m, the volume is just a very little fraction of the 20,000 cubic metres mentioned (>2,000)


@ pesa nane

The piles are the underground support columns where the building raft sits. The depth of these piles varied between 10m and 18m with the deepest pile on the tower side. They do contribute to the overall raft volume...There was about 300 piles on the tower side, 120 piles in the mid sections and about 180 piles towards the monrovia road side.

I will give you the actual dimensions of the plot where the building occupies...

The length of the plot is 109m and the width is 41m. The raft (and basement floors) occupied the entire plot (beacon to beacon). With such a massive area consider the 100mm depth weak concrete blinding (because down there at a depth of almost 20m it was a swamp) and then the raft itself and you will see what i mean by 20,000cu m of concrete.


...besides, the presence of a safe alone does not signify that there is money inside...
bartum
#24 Posted : Monday, July 15, 2013 11:02:30 AM
Rank: Veteran


Joined: 8/11/2010
Posts: 1,011
Location: nairobi
@kaiganjo you must be a civil engineer
mibbz
#25 Posted : Monday, July 15, 2013 11:08:22 AM
Rank: Member


Joined: 2/18/2011
Posts: 448
@Kaiganjo.....i have no clue what you are talking about but i appreciate the facts as this is Wazua and its all about sharing.thanks a lot!!
bartum
#26 Posted : Monday, July 15, 2013 11:13:32 AM
Rank: Veteran


Joined: 8/11/2010
Posts: 1,011
Location: nairobi
mibbz wrote:
@Kaiganjo.....i have no clue what you are talking about but i appreciate the facts as this is Wazua and its all about sharing.thanks a lot!!

ditto black out
segemia
#27 Posted : Monday, July 15, 2013 11:53:23 AM
Rank: Member


Joined: 2/20/2009
Posts: 658
@ Kaigangio. Did you say that the parking was meant for 375 vehicles and 500 vehicles park in that place????Brick wall Brick wall Brick wall
mibbz
#28 Posted : Monday, July 15, 2013 12:42:07 PM
Rank: Member


Joined: 2/18/2011
Posts: 448
segemia wrote:
@ Kaigangio. Did you say that the parking was meant for 375 vehicles and 500 vehicles park in that place????Brick wall Brick wall Brick wall



By the way was wondering the same, @kaigangio....how is it modified to fit an extra 125 vehicles? an extra basement ama? what are the implications of this move....?
Mpenzi
#29 Posted : Monday, July 15, 2013 12:58:20 PM
Rank: Veteran


Joined: 10/17/2008
Posts: 1,234
mibbz wrote:
segemia wrote:
@ Kaigangio. Did you say that the parking was meant for 375 vehicles and 500 vehicles park in that place????Brick wall Brick wall Brick wall



By the way was wondering the same, @kaigangio....how is it modified to fit an extra 125 vehicles? an extra basement ama? what are the implications of this move....?


Nakumatt shoppers has so far taken up most of the parkings here. With more floors and tenants, Nakumatt will lose big as it will no longer be attractive to shop at a place you can hardly get parking.

@Kaigangio, Thank for your detailed info though I have no idea what piles are smile
Mpenzi
#30 Posted : Monday, July 15, 2013 1:02:40 PM
Rank: Veteran


Joined: 10/17/2008
Posts: 1,234
[...........At a depth of 18m below the surface another big challenge arose...The geological tests carried out in the entire area covered by the block showed that the rock here could not carry the weight of the building...besides that, there was evidence of an underground stream directly below which explained why the contractor spent so much time and big pumps pumping out the water pooling from underground and spreading in the huge pit. So what to do...The building raft was redesigned and piles (underground columns) were introduced..]

A reminder that Nairobi was built on a swamp.

http://en.wikipedia.org/wiki/History_of_Nairobi
Kaigangio
#31 Posted : Monday, July 15, 2013 1:12:24 PM
Rank: Elder


Joined: 2/27/2007
Posts: 2,768
segemia wrote:
@ Kaigangio. Did you say that the parking was meant for 375 vehicles and 500 vehicles park in that place????Brick wall Brick wall Brick wall


The structural engineer made a good allowance in the dead and dynamic load safety tolerances...I believe the basements could carry more than the 500 vehicles if it were not for the space unavailability.
...besides, the presence of a safe alone does not signify that there is money inside...
Kaigangio
#32 Posted : Monday, July 15, 2013 1:21:24 PM
Rank: Elder


Joined: 2/27/2007
Posts: 2,768
Mpenzi wrote:
mibbz wrote:
segemia wrote:
@ Kaigangio. Did you say that the parking was meant for 375 vehicles and 500 vehicles park in that place????Brick wall Brick wall Brick wall



By the way was wondering the same, @kaigangio....how is it modified to fit an extra 125 vehicles? an extra basement ama? what are the implications of this move....?


Nakumatt shoppers has so far taken up most of the parkings here. With more floors and tenants, Nakumatt will lose big as it will no longer be attractive to shop at a place you can hardly get parking.

@Kaigangio, Thank for your detailed info though I have no idea what piles are smile


The parkings were actually meant for the office occupiers which is consistent with the current situation...Most (at least 99%) of the people who park in those basements go to work in their offices elsewhere...So removing these people and replacing them with the ones who will eventually have their offices here will make no difference to Nakumatt.


...besides, the presence of a safe alone does not signify that there is money inside...
Kaigangio
#33 Posted : Monday, July 15, 2013 1:33:43 PM
Rank: Elder


Joined: 2/27/2007
Posts: 2,768
murchr wrote:
obiero wrote:
Mpenzi wrote:
Traffic around the area will be terrible

Parking space has been factored into the design. Glass half full. Please think positive. Is traffic around KICC terrible?


Lets think mathematically, assuming everyone in the building and the surrounding with the privilege of driving leaves at 5, and given that the roads will not expand, how will that traffic be?


The traffic flow will not be any different than it is now because the available parking space in the basement will be optimumly utilised just as it is happening now...Although the tower will be constructed there will be no corresponding increase in parking space...

In the early stages fo development, the civil engineers persuaded the Nairobi City Council to make monrovia and mokhta daddah street single lanes which they did...but NCC made a very stupid mistake...introducing side parkings along these roads...This is why most of the times there is traffic jams along koinange street even when the university way is clear!!
...besides, the presence of a safe alone does not signify that there is money inside...
limanika
#34 Posted : Monday, July 15, 2013 2:30:26 PM
Rank: Veteran


Joined: 9/21/2011
Posts: 2,032
Kaigangio wrote:
Kihangeri wrote:
Rankaz13 wrote:


I recall when the existing building was being built and I was in college hapo UoN. There were all these rumors flying around that the building was supposed to be taller than KICC. I was actually surprised they stopped at the existing 8 floors. Perhaps the rumors were true after all.


The foundation for the building was for almost 50 stories high. However, the government of the day decided to munch the difference of 50 minus 8 and the preceeds from NSSF were said to have been spent well.

To be sure, count how many underground parking levels exist in the building.Heavy digging machines looked like toys when the open cast mine was being dug. I worked there for some time.Thus my ...


@ kihangeri...what you are telling us is not true...how long did you work there anyway?

A little insight...

The contract for NSSF Office block between Mokhta Daddah and Monrovia Street as it was originaly known was commissioned to Mruttu Salmann Associates (architects), Abdul Mullick Associates (Structural Civil engineers), Tana & Associates (Quantity Surveyors) and Kisa & Partners Cons. Engineers (Services Engineers). The architectural concept of the building depicted a maasai holding two shields...

This was commissioned together at the same time with the NSSF Embakasi housing, NSSF Mountain View Housing and little known NSSF Karen Housing (White elephant) way back in 1994 when Muindi was the Managing Trustee and NSSF was liquid.

The construction contract for the Office block was awarded in 1997 to one Mavji Construction limited at a tender sum of kshs 3.8 Billion if i remember well...The building consisted of 4 basements parking to accommodate 375 vehicles, Ground floor (nowadays they park more than 500), mezzanine 1 & 2, 31 typical office floors, Lift machines floor, communication masts floor and heliport....

The excavations at some point had to be precisionally controlled because it started generating some problems to the nearby buildings, (read nginyo towers and others) which started developing cracks...

At a depth of 18m below the surface another big challenge arose...The geological tests carried out in the entire area covered by the block showed that the rock here could not carry the weight of the building...besides that, there was evidence of an underground stream directly below which explained why the contractor spent so much time and big pumps pumping out the water pooling from underground and spreading in the huge pit. So what to do...The building raft was redesigned and piles (underground columns) were introduced...

To stabilise the base it took 600 piles distributed over the area ranging in diameter sizes 900mm on the tower side and 600mm in the mid sections and 300mm towards the monrovia road side. Again the raft depths were uneven. The depth of raft on the tower side was a whooping 3.8m!!!...and it varied from various random section to a minimum depth of 1.8m near the monrovia road side...The variation attributed to piles introduction and raft changes was about kshs 0.5 billion (about 12% of the tender sum)...

The concrete pouring for the raft was sub-contracted to Mugoya which was the only construction company that could manage the concrete pours of such magnitude...They had a large fleet of concrete mixer/pumps trucks...About 20,000 cubic metre of concrete went into the raft!!!

At around 1999 NSSF was almost going bankrupt having awarded mega projects and making huge payments...NSSF embakasi housing (kshs 6 billion), NSSF Office Block (kshs 3.8 billion), NSSF Mountain view (kshs kshs 900 million), NSSF Karen housing (Not sure but nearly kshs 2 billion) these figures being contract awarded tender sums....of course 2 years later the variations were huge...Note also the contracts were awarded during an election period and lots of money was needed for the campaign...the cash cow...NSSF!!

The project had to be scaled down and the construction was to reach water tanks floor level...At this level it was projected that the project would cost about kshs 2.8 Billion based on the tendered rates and other unmeasured and concealed works...


This sound like privileged information…. Already now feeling like I have walked from Basement 4 – 39th floor and back.
MoG
#35 Posted : Monday, July 15, 2013 3:20:35 PM
Rank: New-farer


Joined: 4/19/2011
Posts: 49
Location: Nairobi
limanika wrote:
Kaigangio wrote:
Kihangeri wrote:
Rankaz13 wrote:


I recall when the existing building was being built and I was in college hapo UoN. There were all these rumors flying around that the building was supposed to be taller than KICC. I was actually surprised they stopped at the existing 8 floors. Perhaps the rumors were true after all.


The foundation for the building was for almost 50 stories high. However, the government of the day decided to munch the difference of 50 minus 8 and the preceeds from NSSF were said to have been spent well.

To be sure, count how many underground parking levels exist in the building.Heavy digging machines looked like toys when the open cast mine was being dug. I worked there for some time.Thus my ...


@ kihangeri...what you are telling us is not true...how long did you work there anyway?

A little insight...

The contract for NSSF Office block between Mokhta Daddah and Monrovia Street as it was originaly known was commissioned to Mruttu Salmann Associates (architects), Abdul Mullick Associates (Structural Civil engineers), Tana & Associates (Quantity Surveyors) and Kisa & Partners Cons. Engineers (Services Engineers). The architectural concept of the building depicted a maasai holding two shields...

This was commissioned together at the same time with the NSSF Embakasi housing, NSSF Mountain View Housing and little known NSSF Karen Housing (White elephant) way back in 1994 when Muindi was the Managing Trustee and NSSF was liquid.

The construction contract for the Office block was awarded in 1997 to one Mavji Construction limited at a tender sum of kshs 3.8 Billion if i remember well...The building consisted of 4 basements parking to accommodate 375 vehicles, Ground floor (nowadays they park more than 500), mezzanine 1 & 2, 31 typical office floors, Lift machines floor, communication masts floor and heliport....

The excavations at some point had to be precisionally controlled because it started generating some problems to the nearby buildings, (read nginyo towers and others) which started developing cracks...

At a depth of 18m below the surface another big challenge arose...The geological tests carried out in the entire area covered by the block showed that the rock here could not carry the weight of the building...besides that, there was evidence of an underground stream directly below which explained why the contractor spent so much time and big pumps pumping out the water pooling from underground and spreading in the huge pit. So what to do...The building raft was redesigned and piles (underground columns) were introduced...

To stabilise the base it took 600 piles distributed over the area ranging in diameter sizes 900mm on the tower side and 600mm in the mid sections and 300mm towards the monrovia road side. Again the raft depths were uneven. The depth of raft on the tower side was a whooping 3.8m!!!...and it varied from various random section to a minimum depth of 1.8m near the monrovia road side...The variation attributed to piles introduction and raft changes was about kshs 0.5 billion (about 12% of the tender sum)...

The concrete pouring for the raft was sub-contracted to Mugoya which was the only construction company that could manage the concrete pours of such magnitude...They had a large fleet of concrete mixer/pumps trucks...About 20,000 cubic metre of concrete went into the raft!!!

At around 1999 NSSF was almost going bankrupt having awarded mega projects and making huge payments...NSSF embakasi housing (kshs 6 billion), NSSF Office Block (kshs 3.8 billion), NSSF Mountain view (kshs kshs 900 million), NSSF Karen housing (Not sure but nearly kshs 2 billion) these figures being contract awarded tender sums....of course 2 years later the variations were huge...Note also the contracts were awarded during an election period and lots of money was needed for the campaign...the cash cow...NSSF!!

The project had to be scaled down and the construction was to reach water tanks floor level...At this level it was projected that the project would cost about kshs 2.8 Billion based on the tendered rates and other unmeasured and concealed works...


This sound like privileged information…. Already now feeling like I have walked from Basement 4 – 39th floor and back.


Very detailed I must add.

"Never argue with a professional. People might see the difference."- Francis Imbuga
a4architect.com
#36 Posted : Monday, July 15, 2013 4:17:00 PM
Rank: Veteran


Joined: 1/4/2010
Posts: 1,668
Location: nairobi
Kaigangio wrote:
murchr wrote:
obiero wrote:
Mpenzi wrote:
Traffic around the area will be terrible

Parking space has been factored into the design. Glass half full. Please think positive. Is traffic around KICC terrible?


Lets think mathematically, assuming everyone in the building and the surrounding with the privilege of driving leaves at 5, and given that the roads will not expand, how will that traffic be?


The traffic flow will not be any different than it is now because the available parking space in the basement will be optimumly utilised just as it is happening now...Although the tower will be constructed there will be no corresponding increase in parking space...

In the early stages fo development, the civil engineers persuaded the Nairobi City Council to make monrovia and mokhta daddah street single lanes which they did...but NCC made a very stupid mistake...introducing side parkings along these roads...This is why most of the times there is traffic jams along koinange street even when the university way is clear!!


@kaigangio..brilliant logic. If NCC make the area around Nakumatt one way with no street parking, the issue of jam can be resolved.

NCC has a very active planning team in regards to traffic planning. Its main members are the roads engineering team, planning team and development control team. AS to whether they implement these brilliant ideas is fodder for another day.
As Iron Sharpens Iron, So one Man Sharpens Another.
murchr
#37 Posted : Monday, July 15, 2013 4:17:43 PM
Rank: Elder


Joined: 2/26/2012
Posts: 15,980
Kaigangio wrote:
murchr wrote:
obiero wrote:
Mpenzi wrote:
Traffic around the area will be terrible

Parking space has been factored into the design. Glass half full. Please think positive. Is traffic around KICC terrible?


Lets think mathematically, assuming everyone in the building and the surrounding with the privilege of driving leaves at 5, and given that the roads will not expand, how will that traffic be?


The traffic flow will not be any different than it is now because the available parking space in the basement will be optimumly utilised just as it is happening now...Although the tower will be constructed there will be no corresponding increase in parking space...

In the early stages fo development, the civil engineers persuaded the Nairobi City Council to make monrovia and mokhta daddah street single lanes which they did...but NCC made a very stupid mistake...introducing side parkings along these roads...This is why most of the times there is traffic jams along koinange street even when the university way is clear!!


I believe those who will be parking there will eventually leave for other businesses, supposing they all leave at five baada ya kazi, how messy will the roads be esp if we are to believe that the 500 who currently park there work in the vicinity? Traffic will def be a mess....but thats the Kenyan way of doing things...we'll react later
"There are only two emotions in the market, hope & fear. The problem is you hope when you should fear & fear when you should hope: - Jesse Livermore
.
Lolest!
#38 Posted : Monday, July 15, 2013 5:04:43 PM
Rank: Elder


Joined: 3/18/2011
Posts: 12,069
Location: Kianjokoma
bartum wrote:
@kaiganjo you must be a civil engineer

yep, good stuffApplause Applause Applause Applause
Laughing out loudly smile Applause d'oh! Sad Drool Liar Shame on you Pray
kamaug
#39 Posted : Monday, July 15, 2013 9:58:02 PM
Rank: New-farer


Joined: 10/27/2010
Posts: 26
Location: NBI
murchr wrote:
Kaigangio wrote:
murchr wrote:
obiero wrote:
Mpenzi wrote:
Traffic around the area will be terrible

Parking space has been factored into the design. Glass half full. Please think positive. Is traffic around KICC terrible?


Lets think mathematically, assuming everyone in the building and the surrounding with the privilege of driving leaves at 5, and given that the roads will not expand, how will that traffic be?


The traffic flow will not be any different than it is now because the available parking space in the basement will be optimumly utilised just as it is happening now...Although the tower will be constructed there will be no corresponding increase in parking space...

In the early stages fo development, the civil engineers persuaded the Nairobi City Council to make monrovia and mokhta daddah street single lanes which they did...but NCC made a very stupid mistake...introducing side parkings along these roads...This is why most of the times there is traffic jams along koinange street even when the university way is clear!!


I believe those who will be parking there will eventually leave for other businesses, supposing they all leave at five baada ya kazi, how messy will the roads be esp if we are to believe that the 500 who currently park there work in the vicinity? Traffic will def be a mess....but thats the Kenyan way of doing things...we'll react later

Lets not forget... there is a Heliport... they thought of everything... smile
WTF
kamaug
#40 Posted : Monday, July 15, 2013 10:02:19 PM
Rank: New-farer


Joined: 10/27/2010
Posts: 26
Location: NBI
Lolest! wrote:
bartum wrote:
@kaiganjo you must be a civil engineer

yep, good stuffApplause Applause Applause Applause

@Kaigangio, really good info... what do they have planned for safety... fire hazards, evacuation... terrorist threat?Think
WTF
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