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 Footing size for two stories extension, footing size for two storey extension

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TSaviecena2020
post Nov 18 2013, 12:24 AM

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Wow..lot of information i got..thanks anyway
my house is new house(not subsale) and if not mistaken OC was released in Oct 2011. I guess original structural & architecture drawing,soil condition test,etc still at developer side.Not sure whether they willing to entertain me or not. I'm afraid they feel weird if i request it as if i wanna find some loop hole and sue them..haha. but no harm to request it i think.
Basically,I already discuss and request quotation from several contractors..haven't decide it as i wanna study about this foundation issue first...


Attached is some photos of my house.
1st picture is rear side.
2nd picture shot is from neighbour side. My house is at low side.
This is small hill area


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low yat 82
post Nov 18 2013, 10:48 AM

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QUOTE(stevie8 @ Nov 17 2013, 01:53 AM)
When your house is at hill cut area, the area has to be left 10 yrs to subside and pilling needed. Usually you can see your next neighbors are you next to one that is lower than yours and how high is yours? Or the back of your house is hill or the front of your house is higher? Then you can guess if pilling is required or not. Pile only for the column. Footing no need to pile.

Like I said dig the existing footing where you want to extend and follow accordingly.

One other way for column is to dig deep and wide till you hit hard ground, concrete cement, sand and stones are cheap, after all you need only 2 or 4 column max.
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huah...wat type of renovation is thisss.. piling also need. 1 batangs alrady 1-2k not included machinery.. notworthy.gif notworthy.gif


QUOTE(stevie8 @ Nov 17 2013, 06:40 PM)
This is extract from this website

http://civil-engg-world.blogspot.com/2013/...ONAS-Tower.html

"....The geotechnical survey discovered that the actual construction site was situated partially over decayed limestone deposition and rest over soft rock. After discovering this, the structure was relocated to avoid limestone deposition. The whole foundation was rested on 104 piles. To reach safe bed rock the piles were extended to depth ranging from (200-374) feet. To reach this depth, PETRONAS Tower became the structure having the deepest seated foundation of the world....."

So, having your house extension do you think you should do a extended study like our twin tower??? Small issue going beyond what is necessary. The answer my fren is you dont even for building a housing estate with landed houses and apartment blocks.

Do you see people extending thier house bring along load of concrete to test the foundation? You dont, ok! It costs you a bomb or the whole renovation cost by doing so!

I just wonder what the engineer will do and what test he will conduct and by the way you got a house? Your parents got. So you or your parents did any extension to the house and called an engineer to do it?
*
ini mia gnp geo company punya kerja.

haha...bc to TS, jus follow d contractor footing. although they noe nuts ab calculation n etc, but wat they hav is experience. they noe when shud put bigger footing n etc... jus make sure d depth is more or less same like exisitin. in industries, d depth varies from 3'-5'. of course bigger footin means better n also cost more...

QUOTE(aviecena2020 @ Nov 18 2013, 12:24 AM)
Wow..lot of information i got..thanks anyway
my house is new house(not subsale) and if not mistaken OC was released in Oct 2011. I guess original structural & architecture drawing,soil condition test,etc still at developer side.Not sure whether they willing to entertain me or not. I'm afraid they feel weird if i request it as if i wanna find some loop hole and sue them..haha. but no harm to request it i think.
Basically,I already discuss and request quotation from several contractors..haven't decide it as i wanna study about this foundation issue first...
Attached is some photos of my house.
1st picture is rear side.
2nd picture shot is from neighbour side. My house is at low side.
This is small hill area
*
dun gila. who r u to gib all those data...hahah.



aquaria87
post Nov 18 2013, 11:17 AM

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I met a situation when i did my review on project for our company where there is 2 point of view. 1 engineer consultant (the employer's consultant) say no need soil improvement, u just pile (approx setting at 21-25 meter depth) only whereas the other engineer consultant (engage by the contractor) say yes it required soil improvement + piling (same dept setting). Both are using the same SI report. Even they conduct 3rd party to do another SI.

What we the reviewer conclude that both are in the position to state their profesional view based on their experience. in the other perspective, look at who are the paymaster. 1 engage by employer say differently (look at more on cost efficiency) whereas the other whom the paymaster is the contractor say differently (which i dunno, perhaps to get more $$ for his paymaster)..

In conclusion, the project are carried out without the soil improvement. Just piling only. And Yes, they can pile to set at average set of 23meter.

In this case, im not saying the other profesional Engineer are wrong, but it shows that sometime the one follow book+experience may give different view from ther other who strictly follow book only.

cheers.


low yat 82
post Nov 18 2013, 11:28 AM

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QUOTE(aquaria87 @ Nov 18 2013, 11:17 AM)
I met a situation when i did my review on project for our company where there is 2  point of view. 1 engineer consultant (the employer's consultant) say no need soil improvement, u just pile (approx setting at 21-25 meter depth) only whereas the other engineer consultant (engage by the contractor) say yes it required soil improvement + piling (same dept setting). Both are using the same SI report. Even they conduct 3rd party to do another SI.

What we the reviewer conclude that both are in the position to state their profesional view based on their experience. in the other perspective, look at who are the paymaster. 1 engage by employer say differently (look at more on cost efficiency) whereas the other whom the paymaster is the contractor say differently (which i dunno, perhaps to get more $$ for his paymaster)..

In conclusion, the project are carried out without the soil improvement. Just piling only. And Yes, they can pile to set at average set of 23meter.

In this case, im not saying the other profesional Engineer are wrong, but it shows that sometime the one follow book+experience may give different view from ther other who strictly follow book only.

cheers.
*
well... it really depends who wants wat..huhu.. i guess d soil is OK not until d point even d road needs piling! wahaha


Sydneguy
post Nov 18 2013, 11:32 AM

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QUOTE(stevie8 @ Nov 17 2013, 10:50 PM)
Thanks for the trophy, not throphy, mr proud engineer.
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I know this thread has deteriorated into a ego battle between you and Platinum_12. But I think its inappropriate to pick on someones spelling (especially an engineers as we are famous for poor spelling & grammar) since from Platinum_12's postings its pretty obvious that English is likely his 2nd or 3rd language.

I find people in Malaysia are far too quick to jump on others poor English, when in most cases its not their first language. I wish I could speak and write Malayu and Mandarin, Cantonese even 1/2 as well as Platinum_12 communicates in English.

Cheers
Sydneguy
post Nov 18 2013, 11:49 AM

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QUOTE(stevie8 @ Nov 17 2013, 11:02 PM)
Well written. But there is something we called real world as the world we are actually living in. All these approvals and engineers specs are mostly non-existing but just rubber stamps! Draft man draw and engineer sign and stamp, local authority sign and stamp and indon construct the reno extension. No engineer come to site even step in to look at it! So, If you were to hire an engineer the most is he steps on site, curi curi test and charge you a fee. So, suspicious engineer he is because he can even signs and stamps without being on site on most occasions. That is reality otherwise please tell me all these reno extensions all of them hire engineers and so to be approved by local council? We buy the stamp only la.
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Yes I know only too well about the "real World" here in Malaysia and the "Tidak Apa" attitude of far to many people.

Yes, you can get an indon laborour to do your engineering consulting for you and specify all your footing, beam and column sizes if you wish, many of those houses wont fall down, but its likely most of them will develop at least some minor or major structural during their lifetime. But every so often you will get a house that falls down and possibly kills someone.

I recall there was a case in Bangsar during the last 12 months where a renovation work collapsed and killed 1 or 2 of the workers.


Here are just a few Malaysian construction disasters due to "tidak apa" attitudes about following the correct procedures.

http://www.thestar.com.my/News/Nation/2013...e-not-mall.aspx

http://www.theborneopost.com/2011/11/01/re...orkers-injured/

http://www.themalaysianinsider.com/malaysi...al-works-charge

http://www.starproperty.my/index.php/artic...ouse-in-cheras/

http://www.nst.com.my/nation/general/1-kil...llapse-1.159099

Anyway feel free to use your "cut corners" approach on your house renovations. but please don't encourage others with an air of authority and without warning them of the very serious possible consequences.

Also if you ever try to sell your renovated properties please give full disclosure (as required by law) and inform the potential buyers that you didn't follow the correct procedures and you cut many corners while doing your renovations and it is unlikely that the renovations meet the minimum requirements of the building codes. Then tell them not to worry its "tidak apa".

Cheers
aquaria87
post Nov 18 2013, 12:14 PM

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i wonder why Majlis does not required structural drawings if u just reno 1 storey only. Majlis only require structure drawings if u do 2 storey and above. hmm.gif

Is Majlis not concern on the safety for 1 storey extension works? i dont think so as the renovation drawings will be approved by their Unit Bangunan. whistling.gif


platinum_12
post Nov 18 2013, 12:36 PM

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QUOTE(aquaria87 @ Nov 18 2013, 01:14 PM)
i wonder why Majlis does not required structural drawings if u just reno 1 storey only. Majlis only require structure drawings if u do 2 storey and above. hmm.gif

Is Majlis not concern on the safety for 1 storey extension works? i dont think so as the renovation drawings will be approved by their Unit Bangunan. whistling.gif
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Single story extension is considered a light weight structure, so it has less fatality risk. That is why majlis dont really bother to look at it. However if the extension involves slab roofing, its a whole diffent story.
aquaria87
post Nov 18 2013, 12:44 PM

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QUOTE(platinum_12 @ Nov 18 2013, 12:36 PM)
Single story extension is considered a light weight structure, so it has less fatality risk. That is why majlis dont really bother to look at it. However if the extension involves slab roofing, its a whole diffent story.
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Still there is structure involve. what if the soil is very bad then the structre collapse later even it is so call light weight but the risk still there rite? And even if involvse small section slab roof for water tank also the Majlis doesnt bother hv structure drawing... rclxub.gif
weikee
post Nov 18 2013, 02:32 PM

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QUOTE(aquaria87 @ Nov 18 2013, 12:44 PM)
Still there is structure involve. what if the soil is very bad then the structre collapse later even it is so call light weight but the risk still there rite? And even if involvse small section slab roof for water tank also the Majlis doesnt bother hv structure drawing... rclxub.gif
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Did my house slightly over do smile.gif Told my contractor I need the footing to support double stories (back of my house), but for the time being build one floor first. In future will do 2nd floor. Therefore now I have a double story footing but supporting single floor on the back of my house. Is actually not much extra.

TSaviecena2020
post Nov 18 2013, 03:18 PM

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QUOTE(weikee @ Nov 18 2013, 02:32 PM)
Did my house slightly over do smile.gif Told my contractor I need the footing to support double stories (back of my house), but for the time being build one floor first. In future will do 2nd floor. Therefore now I have a double story footing but supporting single floor on the back of my house. Is actually not much extra.
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Weikee, due to budget issue, i might follow as yours.build 1st storey,2nd floor later.however footing n foundation need to follow as double storey extension. So for majlis submission, only submit 1st floor right.2nd floor will be later( maybe 5 yrs later after budget enuf).
weikee
post Nov 18 2013, 03:34 PM

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QUOTE(aviecena2020 @ Nov 18 2013, 03:18 PM)
Weikee, due to budget issue, i might follow as yours.build 1st storey,2nd floor later.however footing n foundation need to follow  as double storey extension. So for majlis submission, only submit 1st floor right.2nd floor will be later( maybe 5 yrs later after budget enuf).
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Yup I submitted as ground floor for my kitchen.
stevie8
post Nov 18 2013, 04:01 PM

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QUOTE(Sydneguy @ Nov 18 2013, 11:49 AM)
Yes I know only too well about the "real World" here in Malaysia and the "Tidak Apa" attitude of far to many people.

Yes, you can get an indon laborour to do your engineering consulting for you and specify all your footing, beam and column sizes if you wish, many of those houses wont fall down, but its likely most of them will develop at least some minor or major structural during their lifetime. But every so often you will get a house that falls down and possibly kills someone.

I recall there was a case in Bangsar during the last 12 months where a renovation work collapsed and killed 1 or 2 of the workers.
Here are just a few Malaysian construction disasters due to "tidak apa" attitudes about following the correct procedures.

http://www.thestar.com.my/News/Nation/2013...e-not-mall.aspx

http://www.theborneopost.com/2011/11/01/re...orkers-injured/

http://www.themalaysianinsider.com/malaysi...al-works-charge

http://www.starproperty.my/index.php/artic...ouse-in-cheras/

http://www.nst.com.my/nation/general/1-kil...llapse-1.159099

Anyway feel free to use your "cut corners" approach on your house renovations. but please don't encourage others with an air of authority and without warning them of the very serious possible consequences.

Also if you ever try to sell your renovated properties please give full disclosure (as required by law) and inform the potential buyers that you didn't follow the correct procedures and you cut many corners while doing your renovations and it is unlikely that the renovations meet the minimum requirements of the building codes. Then tell them not to worry its "tidak apa".

Cheers
*
The tidak apa people are also those who don't visit sites.

By the way, it is not Malaysia and to single out malaysia is most unfair. Building collapses, bridges collapsed are everywhere from Japan round the world and back to Japan and including oz your ideal country. This is the real world, not only buildings and bridges but nuclear plants included! I can google and point you to the sites but waste of time, you can google yourself.

Anybody who would bought my house(s) would be in for extra benefit with added rebar and higher grade concrete from specifications and personally supervised by me, just for your info. Wrong words. Not cut corners, spend wisely. We who understand the real world and to live with it, wise people like us like what Weikee said, we OVER DO IT!!!

And if you were to ever buy a house with extension, my advise to you is demolish it, be very careful because we are all tidak apa people and one day it would collapse on you!

Aquaria said, there are book+experience and strictly follow book only. You need experience and live with it to survive better in this imperfect world. Good to fight for ideal but you cant fight it here. First change within your group, your engineer peers.

Cheers
TSaviecena2020
post Jan 11 2014, 09:30 PM

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i manage to get structure drawing from developer...
the footing size are vary base on location.
initially i thought, it will be the same for all



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bencsn
post Jan 11 2014, 09:58 PM

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QUOTE(aviecena2020 @ Jan 11 2014, 10:30 PM)
i manage to get structure drawing from developer...
the footing size are vary base on location.
initially i thought, it will be the same for all
*
Of cause the sizes are different. It depends on the beam span, the slab thickness, service loadings, etc.

Foundation is not straight forward. But then again, extension is not a massive job.

I have seen entire extension teared off from the main building slanting & also extension sink.

Size of the footing depends on the depth of the footing too. There are just too many things you need to know before you decide on footing size.

Unless the contractor gives you 5 years warranty, else I won't follow their advise. You have to understand, once the drawings are stamped by engineer, it's at least 50 years warranty.

Your choice. smile.gif
monkey9926
post Jan 11 2014, 11:17 PM

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QUOTE(kelvyn @ Nov 15 2013, 01:44 PM)
The size of the reinforced concrete (RC) pad footing is dependent on the ground condition and also the load taken by the column.
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Wah a lot of engineers in lyn.
JinXXX
post Jan 11 2014, 11:34 PM

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QUOTE(monkey9926 @ Jan 11 2014, 11:17 PM)
Wah a lot of engineers in lyn.
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u mean wannabe ? lai lai.. post up your certification number smile.gif , so can confirm smile.gif
stevie8
post Jan 11 2014, 11:59 PM

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QUOTE(aviecena2020 @ Jan 11 2014, 09:30 PM)
i manage to get structure drawing from developer...
the footing size are vary base on location.
initially i thought, it will be the same for all
*
Finally you got it thumbup.gif CNY soon can't start reno right away, right?
TSaviecena2020
post Jan 12 2014, 12:20 AM

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QUOTE(stevie8 @ Jan 11 2014, 11:59 PM)
Finally you got it thumbup.gif CNY soon can't start reno right away, right?
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Yup,i guess best time is after CNY.base on the drawing,the smallest footing is 500mmX500mm.quite small i think

This post has been edited by aviecena2020: Jan 12 2014, 12:21 AM
stevie8
post Jan 12 2014, 10:30 PM

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QUOTE(aviecena2020 @ Jan 12 2014, 12:20 AM)
Yup,i guess best time is after CNY.base on the drawing,the smallest footing is 500mmX500mm.quite small i think
*
Go for the biggest one, cement, sands and stones are cheap. Rebar not so expensive also. Labor same just dig a bit more.

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