Imagine if they didn't catch it during the build inspections...
Imagine if they didn't catch it during the build inspections...
On the bright side, punters will be happy to have 10% guaranteed return (assuming handover happens on time, 9 months after original date)..
Not sure whether to be alarmed that the problem happened in the first place or happy to see one of the major developers take it on the chin and do what has to be done to fix the issue + compensate the investors/home buyers affected.
NWD's share price took a hit today.
At least they're not covering it up.
Good to see this being caught .. not too late.
M40 v/s M80 strength / rating - whatever that means...
https://news.rthk.hk/rthk/en/compone...9-20210708.htmProperty developer New World Development announced earlier in the day that the two buildings at ‘The Pavilia Farm’, which are half-built, have failed concrete strength tests and must be knocked down and constructed again.
Wong said a lax monitoring mechanism or miscommunication between the contractor and workers might have led to the problem.
He said New World Development had made the right decision to demolish the towers.
"If they did not rectify the situation, they will not get the occupation permit," he said.
That's the compressive strength of the concrete. I.e. how much you can squeeze it (after it's cured for a month) before it breaks. It's tested using smallish cubes.
M40 means it can withstand 40 Newtons of pressure per square millimetre, or 40 million Newtons per square metre.
A kilogram presses down with about 10 Newtons, so 4kg pressing per square mm, or 4 million kg per square metre. Concrete is strong.
M80 is double that.
Cynic! I’m sure any corporate making the right decision looks to maximise profits or minimise losses but I’m also sure there’s plenty of businesses making the wrong decisions for the same outcome.Original Post Deleted
Thank you for explaining! So if we are close to the ground floor and we have a 50 floor skyscraper above pushing its weight on the block. So the square meter block then has some 200m high concrete block on top of it. Quick google concrete has density of 2400 kg per cubic meter. That times 200 is 0.48 million kg. And the M40 can withstand 4 million so the safety factor is about 8.3
This is then only caculating the weight of a 200m high concrete block actually it will partially also carry the weight of the building which is not directly sitting on top of the block (floors, ceilings, iron within the concrete etc etc). So the actual weight carried is probably close to twice as much, which brings down the safety factor to only 4. With a swaing building during typnoons etc, one can see with my simple calculation that the safety margin probably is enough but pretty slim if the building comes under stress.
Fun to learn something new!
But on the other hand, the key weight taker are the pillars. So its a matter of whether the concrete+iron cast pillars are up to standard or not. Concrete walls are not weight taker for the whole block.. is the safety factor so tight ?
At lest we have anymore tofu build quality like you get in Suichuan schools. Hung Hom MTR station and now this building is getting caught with tofu construction