Dr B

Yes

Because I got dragged intio it 20 years ago.

They could start with why these Government projects start off with a "budget". How can you have a published budget when you don't even have a design or a tender. The answer is that it is necessary beacsue that is what the "commission" is based on. 20 years ago it was 20%, and will not be any less now. So all the tenderers knew that the winner would have to pay Bt 512 million in cash, mainly to the Minister, before they got to sign the contract. This means that CRC10-ITD had a price of about Bt 1.6 billion to actually build the building, so they would eventually get the Bt 512 million back, at the taxpayers expense. However in this case, they had only been paid soemthing over Bt 900 million for the works to date, and only Bt 400 million net. The Bt 512 million would also have been safely put away before the ACOT first got involved, giving them less chance of finding it. People are shouting about CRC10-ITD being corrupt, and they may well be, but the biggest slice had already been taken.

Wrong this time, because it was "of course".

Two comments. 1 Most of the standards for steel relate to ultimate tensile strength and yield strength (in tension). From the videos there was no sign of a failure in tension. 2 With regard to bonding, the 20,000 tonnes of reinforced concrete which fell would have recahed a velocity of well over 100 km/hr. Not much concrete would bond to steel after such an impact.

When the company was formed, a long time ago, there was an Italian with a name like Signor Berliangieri, and Dr Chaiyut Karansutra. The Italian is long gone, and the company has been listed on the SET for many years. Who knows who owns all the shares now.

Over the five days since the earthquake and collapse, there have been a huge number of comments on AN, the vast majority by people who know little or nothing about construction. Specifically these include suggestions that columns were too slender and not "earthquake proof", and that this was Table Top construction. I assume that Table Top construction is somethign done in the kitchen, which is where the people who made the comments would be better employed. I think the term they were looking for is Table Form, which is used as formwork for the underside of flat floor slabs, and has been now for many decades. Once the ground floor is cast, the table forms are set up to the required height, the reinforcement and prestressing laid out, and the concrete poured, compacted and levelled. Commonly extra cement is used to gain early strength, such as 28 day strength in 7 days. Once the first floor is stiff enough the prestressing is applied, then the second set of table forms can be set up, and the process repeated. The same with a third set, by which time the first set is no longer required and can be moved to build the fourth floor, and so on to the top. The prestressing allows thinner slabs and less beams. This reduces the building weight, hence column sizes and foundations, and also reduces floor to ceiling heights. Leaving out beams could reduce that by 300 mm, which would be a 9 m (about 7%) saving in a 30 storey building, with significant savings in vertical construction cost. The prestressed slabs are supported vertically by the columns, at which they are very efficient. They do not take horizontal loads, whether from wind or earthquake. These are taken by the core, which is where the lifts are housed, and has three solid walls, and one wall with strengthened openings for ingress and egress, so very stiff and strong. The floor slabs easily transmit horizontal forces to the core. That is how virtually all high rise buildings work, including the 70 storey condominium in Bangkok for which I designed the foundations. Then we come to the construction, and there as been inconsistency in the reporting from journalists who do not understand all the details of what they write. From what I have read, the overall Chinese contractor is CREC, and they are extremely large globally. They appear to have a division called CRCC, who in turn have a branch in Thailand. That branch appears to have been in JV with ITD. JVs are separate business entities with their own Boards of Directors and shareholding, so can go bankrupt without either of the main partners becoming bankrupt. I have certainly read that for CRCC Thailand this was their first high rise construction. That should not have mattered too much since ITD have a lot of experience, including their own 42 storey head office bult 30 years ago, and many others. There was a post on AN earlier of a Google or similar translation of a press release from CRCC which made it clear that the core was to be slip formed. This is a major red flag. Slip forming is a very successful but highly technical process, in which the vertical core is poured in one continuous operation, 24/7, with the form moving very slowly, and long enough that fresh concrete is placed at the top while that coming out at the bottom is strong enough to stand and support the weight from above. For the concrete to be monolithic fresh concrete must always be placed on and vibrated into concrete which is still fluid, so this requires very careful management and control, and therefore substantial experience. It is not something learned from textbooks or in a univesity course, but by working alongsid epeole who know what they are doing. I do not know if ITD had expereince of slip forming, and if this was CRCC's first high rise building they may also not have had experience, which is a very major concern. It was also reported, without details, that the project had been hit by numerous delays. Clearly this raises the risk that these "delays" impacted the 24/7 operation of the slip forming, which cannot be stopped. I am not an expert but I would imagine that, if the process is stopped, the upper layer of concrete will not be at full strength. There is therefore probably a procedure whereby the forms have to be removed, all understrength concrete broken out, bonding agent applied, forms refixed and concreting continued with extra care on vibration at the joint. This would be a lengthy and tedious process, and likely to be cut short if persons are not familiar with slip forming. The result would be a horizontal "dry joint" in the core at each stoppage, which would have significantly reduced shear strength. This would not be apparent during construction, with virtually all loads vertical. However once complete and fully clad, and wind loads would result in high shear forces at the base, and an earthquake would lead to the piled foundations moving with the soil while the inertia of the building tries to resist, also resulting in a large shear force at the base. If there were dry joints then this force would all have to be taken by the steel, which would lead to rupture of the core walls. This would then lead to progressive collapse of the building from the bottom up, and the reason why there is no sign of the core in the rubble heap, even though it should be the strongest element of the building. I have seen the video of a few high level columns rupturing, but as the tower goes down most of the upper floors are seen to be all falling together at the same separation, showing that the main failure is from the bottom. So that is where I believe any investigation needs to be concnetrated, particulalry on records of the slip forming, and delays and stoppages, at what levels, and what remedial measures were undertaken?

Good data, but it is a shame that they distort by chopping off the bottom of the y-axis. Makes it look much worse than it is, even though it is bad enough.

Just in case you weren't aware, Professor is a position, whereas Dr is a qualification, so it is quite normal for professors to use both.

Unforunately it is not even immigration, which refers to permanent residence. Most of this is supposed to be Tourism, so there are already two different ministries involved. Best way to be able to extract the occasional "fee" is to keep it murky. Clarity restricts so many opportunities.

Police General Siam Boonsom, Commissioner of the Metropolitan Police Bureau, is scheduled to visit the site later today to assess the situation and oversee the investigation. I wasn't sure if my memory was deceiving me, so I checked, and it wasn't. In the very next article about foreign prostitutes in Soi Nana, who is leading the investigation? Police General Siam Boonsom! Obviously amn expert in lots of things.

I have just read all 5 pages of posts on this, and one thing is missing from all of them. What I have noted is: 1 The road, apparently a flyover, had a gentle curve to the left, assuming that the quad bike was travelling towards the camera in the main photograph in the OP. 2 The surface appears to be in good condition. 3 The weather appears to be fine. 4 The main damage is to the offside front wheel of the quad bike. 5 Given the things listed above, even with the lack of grip of quad bike tyres, there was no sharp turn so he should have been able to manage that gentle curve without skidding. 6 There is therefore another possibility, and that is that his death was the casue of the accident rather than the result of it, just as happened with my friend Colin Hastings in Jomtien 11 months ago. 7 Assuming that he was coming from the top right in that original photograph, towards the camera, he appears to have travelled in a straight line, croosed the central line markings into the opposite lane, and carried on to hit the barrier. It is therefore certainly possible that a 62 year old had some sort of heart attack, stroke or seizure, failed to take the gentle curve left and went in a straight line hitting the barrier. The amount of blood on and around the body would give an indication, but there was no reporting. Hopefully an autopsy, as with Colin Hastings, will clear it up, but then most of the posters on AN will have to eat their very cruel words. RIP Scotsman.

The OP stated that the capacity was 50 million visitors, and the cost was over Bt 2 billion. That's Bt 400 per entry, and even not knowing anything about IT costs, I am sure that is way over the top. But then why would any Government Minister care? All they want is their cut of the Bt 2 billion, so why should they even bother to check if the spec is OK, or if there is a need for a future top up budget? Now they are quite happy if another substantial sum is required, because that is another opportunity for a commission. Do you ever hear any news about this Government discussing, planning, or doing anything that is just for the benefit of the population? Answer - No. All they are interested in is capital expenditure from which they can take a cut. Unless and until that is sorted out this beautiful country and its longsuffering people will never be able to make real progress, though most of them have put up with it for so long that they have accepted it as normal. Hopefully the younger ones will grow in understanding and take more control.

If they want to increase the traffic, they need to increase the number of flights, which they have no power to do if they are handling the number of people who want to travel. All of the proposals from the Deputy Minister are either a construction contract to extend the runway (has anyone established that it is a limiting factor), or capital purchases of fancy equipment. In other words, things he can get his greedy cut from.

Simply not true. If you buy at wholesale quantities the ban does not apply.