Hai there, Izwan here, want to share with future house owner who is doing house extension-e.g Kitchen, porch etc...

So 2 years back got this owner who basically got a house at nilai...after giving all the proper quotations ... owner keep quiet and decided to get a cheaper Indonesian contractor. instead...so just wish him all the best on the renovations lor....
Got a call last week, ,and he ask to come over and asking for an advice regarding this situation his having....im assuming those typical roof leaking, water seepage since malaysia is currently having its monsoon season....

To my surprise, the renovation extension went horribly wrong.

On my findings , this is the issues that the house is having:-


1) The new ground and first floor back extension is not properly structurally design. The first floor floor beam and the roof beam is tie to the original existing beam.
and same goes to the first floor R.C slab.....
A new extension should have created another new column after the existing building so that this old and new building have different structure loading purpose.

2) The ground beam missing... hahahaha..... crazy.....

3) Column design / R.C footing under design... so the double storey extension load cannot catered by the Footing and column thus settlement occurred .
The new beam and slab connecting to the existing building is producing "shear stress" that causes the building to have a major crack....


So... my question is to you all.... what do you think you all should do if this situation suddenly occurred to your house...?????

cheers mate,
Izwan
archidstudio

wow, there is a huge crack line

Yeap… I have to decline to do the job due to the hazardous condition…this demolition need to use manual labour due to no machinery access …it’s like you are playing a game of “jenga blocks”…. One wrong move can easily make the building collapse…. Dangerous for workers …..if front extension still ok , just use machinery …..

Cheers mate ,
Izwan
archidstudio

The owner still got the face to call you back ?

If I were you, I'll tell the owner that he will need to spend the rectification repair cost + the existing repair cost.

The current house, no matter how need to be vacated for the repair.

1) Get the solution of the rectification ready. The C&S solution on the structure & related building works.
2) Get the bill of quantity / pricing ready - contractor quote.
3) Establish the cost of the repair - this is the main part. If this stuck, it won't move.
4. Establish the timeline need. During the renovation, the owner may have to temporary rent at other places.

Correct … if I’m interested to do the job , that is the listing above mention that I need to be doing … since I have already decline to do the job due to workers safety no point for me of doing …..


I only advice the owner that in order to demolish this , you need a secondary steel structure to hold the building and need to determine which is the weakest point of the building ….. slowly and carefully demolish it part by part ….
This is the part of a structure engineer to come in…..

That current extension he spent about 50K plus …. So 50K plus down the drain already …..

And yeap I already ask the family to move out ….. since i mention earlier the shear stress pulling from the existing building may effected the existing building structure strength …..


Cheers mate
izwan
Archidstudio

Actually I post this because I don’t want future house renovation owner to do the same mistakes like this owner did … please make sure in any major2 renovation the structure calculation and drawinng is very important….but if need structure drawing you need archi drawings as well lah … if not how they want to determine the spaces usage and dimensions …..

how did they make the crack? dig the soil below the house? usually the land movement only cause that, or the pilling is not done properly, else is the remove the soil, then the soil move and cracked the wall, this has become structural damage, may need engineer to verify if the house is still safe to stay, and if it is link house, those house besides also need to do thorough check

Already mention to owner get structure engineer to verify ….got settlement occurred due to the double storey extension loading …. So basically the footing , stump , column under design ….

Best option extension for a double storey or 3 storey back extension is raft foundation design …the whole load seating on top of one giant plate or RC slab…


Cheers mate
izwan
Archid studio

What would be a guesstimate on the minimal cost a repair cost for this will take?

minimal cost?
1) fee for Structure engineer consultation and new structure drawings.
2) New additional support during demolition works ... e.g steel beam/ column or Steel frame scaffolding like the ones they used for mrt /lrt construction
3) Labour works which may incurred higher rate.
4) New Majlis Perbandaran Nilai Submisions...
5) Construction of New building works -redo back 2 story extensions
etc....
6) since settlement already occurred.. need to backfill , compact again soil.... and if necessary have to do soil test....

i dont consider it minimal cost already... hahahaha... you are basically looking at RM 80K and above job

cheers mate,
ArchidStudio

Nice thread engineer vs contractor

https://forum.lowyat.net/topic/3030656/all