00:47.0
This is the steel bar used in the construction of a building in China.
00:55.0
Oh, malugaw na! Walang lasa. Holy crap, my dudes!
01:00.0
So, kung maikita natin, one, isang napansin ko is yung anilyo nila. Sobrang nipis nung diameter na ginamit.
01:06.0
Also, my dudes, hindi ko sure kung si Kuya Ngaba yung nagmamay-ari ng pinakamarakas na kurot sa balat ng lupa
01:12.8
or talagang sobrang weak lang nitong bakal na ito.
01:16.8
So, it is very brittle and ayaw natin na ganyan yung bakal na ilalagay natin doon sa mga poste natin.
01:22.8
That is not a good sign.
01:36.8
Oh, no! What the?
01:39.8
So, sa unang tingin, my dudes, is medyo suspicious yung kanyang reinforcement bar.
01:43.6
So, kung ganito yung ginawa sa inyo ng contractor nyo, feeling ko,
01:46.6
magsusumbong na tayo sa City Hall or doon sa Tito natin na laging nakatangk-tap na puting sando.
01:52.6
Pero, my dudes, bago tayo magsumbong sa kanya is tingnan muna natin maigi yung ganitong bar.
01:57.6
So, ito yung tinatawag natin na fiber reinforced polymer bar.
02:01.6
So, meron actually na mga reinforcement bars na gawa sa ganitong klaseng materiale.
02:06.6
So, fiber reinforced polymers, which basically gawa siya sa parang mga fibers
02:11.4
na pinalibutan ng polymer or some sort of plastic.
02:14.4
At yun yung pinakamaterial na alternative doon sa traditional natin na bakal na mga rebar.
02:21.4
So, not to worry, meron talagang ganitong klaseng mga rebars, my dudes.
02:25.9
Steel bar broke when I dropped it.
02:30.9
Oh, shiba liba, man!
02:33.7
Typical causes kung bakit nagingin brittle yung bakal is one,
02:37.2
either masyadong mataas yung carbon content niya.
02:40.2
So, hindi na siya ganoon ka-plastic or hindi na siya malleable.
02:44.2
And then, another cause kung bakit nagingin brittle na ganyan yung bakal is overbending.
02:48.2
So, as a rule of thumb, my dudes, pag nagpapabend ako ng anilio
02:51.2
or any type of reinforcing bars doon sa side is one bend lang.
02:58.2
Kasi, minsan, pag nagkamali ng metal,
03:01.0
So, that causes some microstress fractures doon sa bakal
03:05.0
and hindi na siya kasing lakas kumpara doon sa isang bend lang.
03:09.0
So, yun is one other cause of brittleness sa bakal.
03:12.0
And then, another, which is a big, big no-no para sa akin, my dudes,
03:16.0
and pag nakita kong ginawa ito ng mga construction worker,
03:23.0
So, basically, ang ginagawa ng ibang construction worker
03:27.8
So, basically, ang ginagawa ng iba pag ganito na kalalaking bakal
03:31.8
is hindi na nila mabend ng mano-manong ganon with a bender.
03:34.8
Binoblow torch nila or ginagamitan nila nung parang acetylene torch
03:39.8
para lumabot yung bakal.
03:40.8
And then, pag lumabot na yung metal, sa kanan nila i-bend.
03:43.8
So, that is not a good practice.
03:46.8
As much as possible, cold bend dapat lahat ng bends ng reinforcing bars nyo.
03:51.8
In a big wind, the building's exterior wall insulation and exterior wall tiles fell off as a whole.
04:07.6
Dude, this is not the kind of nahubadan that you wanna see.
04:11.6
Naalis yung pinaka-fasad ng kanilang building,
04:13.6
which is typically insulation.
04:15.6
Ang minsan ginagawa dito sa mga cold countries is nilalagyan nila ng foam.
04:20.6
And then, yung foam na yun, doon sila maglalagay ng plaster
04:24.4
or mga exterior cladding and stuff like that.
04:27.4
And if we are going to zoom in with our eagle eyes,
04:30.4
may kita natin is meron silang mga grooves sa wall
04:33.4
and kadalasan yung mga grooves na yan is purely for aesthetic purposes
04:37.4
or pangpaganda lang ng building.
04:39.4
But in some cases, yung grooves na ito, it serves two purposes.
04:42.4
Is one, pag nagkaroon ng expansion yung materials,
04:45.4
is hindi sila magbubunguan.
04:47.4
And then, two, is kadalasan yung material na ito,
04:51.4
dahil may gap dyan,
04:53.2
pag nasira itong material sa taas,
04:55.2
ay yun lang yung matatanggal.
04:57.2
Dahil nga sa gap, the damage will stop there.
05:00.2
Pero yung ginawa nila dito is mukhang isang buong exterior wall insulation yung dinikit nila,
05:05.2
which is a bad idea.
05:06.2
So, kung sinegment nila yun,
05:08.2
hindi mangyayari ito.
05:09.2
Isa lang siguro yung matatanggal, maybe one or two.
05:12.2
Dishonor on your ancestors.
05:15.2
This city is located in southern China.
05:18.2
On June 19, a seven-story building collapsed in its entirety
05:23.0
to seven stories.
05:25.0
Tapos, ganun na siya.
05:27.0
The building fell to pieces,
05:29.0
and there were not even a few steel bars in sight.
05:31.0
They must have been stolen by foreign forces.
05:34.0
It must have been stolen by foreign forces.
05:36.0
Ano yun? Ninakaw ng aliens yung kanilang mga rebar.
05:39.0
So, that is not a good sign na wala silang ginamit na rebars.
05:43.0
Because, you know, in reinforced concrete,
05:45.0
yung concrete at yung mga rebars is usually
05:47.0
dapat magkasama yung dalawang yun.
05:49.8
Para yung suka at toyo sa adobo eh.
05:51.8
Without one, the adobo will taste weird, di ba?
05:54.8
Because the concrete will act against compressive forces
05:58.8
or yung mga pumipisil na forces.
06:00.8
And then, yung mga steel bars naman ay para sa mga tensile
06:04.8
or yung pahila na forces.
06:06.8
SEG Tower once set a record as Shenzhen Speed
06:10.8
by building a floor every 2.7 days.
06:13.8
It later became a landmark building in Shenzhen.
06:16.8
The rapid construction speed of the building
06:18.6
has made people worried.
06:20.6
The shaking of the building for three consecutive days
06:22.6
has earned the SEG Tower
06:24.6
the nickname of Shaky Building.
06:29.6
Okay, so tulad ng sabi niya kanina,
06:31.6
one floor every 2.7 days.
06:34.6
That is unheard of, actually.
06:36.6
Because typically, my dudes,
06:37.6
pag kami gumagawa at in normal circumstances,
06:40.6
yung concrete na ginagamit namin,
06:42.6
which is, you know, normal concrete,
06:46.6
mga 21 days to a month yung curing time niya.
06:49.6
So, when I say curing time,
06:50.6
ganun katagal bago niya ma-achieve yung full strength niya.
06:54.6
Before that time,
06:55.6
hindi pa siya dapat a-applyan ng forces
06:57.6
kasi hindi pa siya fully cured, e.
06:59.6
So, hindi niyo pa pwede patungan ng isa pang poste,
07:02.6
yung poste na nag-cure pa lang.
07:04.6
So, that will weaken the curing post.
07:06.6
So, kumbaga sa mga nag-gym,
07:08.6
kung nag-heal pa lang yung muscles mo,
07:10.6
tinira mo na naman.
07:11.6
So, chest day ka ng chest day.
07:13.6
Nagtataka ka ba't di lumalaki yung chest mo?
07:16.6
you didn't give your muscles enough time to recover,
07:19.6
which is very, very important.
07:21.6
Matulog ka naman pa minsan-minsan
07:23.6
at kumain ka ng mga chicken breast.
07:25.6
Huwag puro cup noodles.
07:27.6
Hindi lalaki muscles mo dun.
07:32.6
So, yun nga tulad ng sinasabi ko,
07:33.6
yung curing time for concrete
07:35.6
is very, very important.
07:38.6
So, this is the promenade in Nandian
07:40.6
called the Integrity Promenade.
07:43.6
It collapsed entirely yesterday in the gale.
07:45.6
So, natumba siya dahil kung titignan natin
07:47.6
ang malapitan itong mga columns is
07:50.6
parang dinikit lang ito ng laway at kanin,
07:53.6
Walang kabakal-bakal in between.
07:55.6
So, talagang matutumba yan.
07:57.6
So, semento lang yata yung pinandikit nila,
07:59.6
which is not really a great pandikit, my dudes.
08:02.6
Very, very ironic yung pangalan niya na
08:05.6
Integrity Promenade
08:07.6
because walang structural integrity whatsoever ito.
08:13.6
Hindi ko alam kung saan gawa itong biga na ito.
08:17.6
Parang gawa sa milo.
08:19.6
Why did you use milo on your beams?
08:21.6
May energy gap na yung beams nyo.
08:23.6
Mukhang lupa yung ginamit nila dito
08:25.6
or buhangin galing sa desierto,
08:27.6
which is not a good type of sand to use.
08:29.6
So, typically yung mga sand na ginagamit sa construction
08:32.6
ay gawa sa crushed na gravel
08:36.6
or malalaking mga boulders kinakrush nila
08:38.6
and then yung mga sand na nanggagaling don
08:40.6
is yun yung ginagamit
08:42.6
and then minimix na rin sa unting mga river sand.
08:45.6
This is not a good sign kasi medyo reddish siya.
08:48.6
So, kung river sand yan, that would be more grayish.
08:51.6
Dishonor on your cow.
08:53.6
Dishonor on your concrete mixture.
08:56.6
Dishonor sa kalabaw ng lolo mo.
09:09.6
the developer delivered the newly completed building
09:11.6
to its home buyers
09:12.6
and the homeowners found severe quality problems
09:14.6
with the building.
09:20.6
bakit ang dali niyang natatanggal yung mga yun?
09:22.6
Mas matindi pa yung dikit ng takit ng yakult eh
09:24.6
kesa dun sa pagkadikit nila dito
09:26.6
sa kanilang mga boards.
09:29.6
bakit yung doorjamb nila ganun lang karipis?
09:32.6
yung doorjamb na ginagamit namin sa mga bahay
09:34.6
is solid na wood.
09:37.6
Yan yung hawak ng pintuan natin.
09:39.6
So, as much as possible,
09:40.6
gusto natin na matiba yung ating mga doorjamb.
09:42.6
Kaya nga, yung kadalas ang sinasabing nila
09:44.6
is pag nag-earthquake,
09:45.6
you stand underneath a doorjamb
09:47.6
kasi solid wood dapat yun.
09:49.6
Pero kung nag-earthquake
09:50.6
and you stood underneath this doorjamb,
09:52.6
wala, isa ka sa unang madadaganan.
09:54.6
Hindi ko alam kung paano
09:56.6
hindi pa nababaklas itong hinge nila dito.
09:58.6
So, that is probably some ancient Chinese magic.
10:03.6
In this neighborhood,
10:04.6
the exterior wall of a high-rise residential building
10:07.6
with more than 30 floors
10:09.6
has a black crack from the ground floor to its top.
10:13.6
Online Chinese have judged the crack
10:15.6
to be more than 50 meters long
10:17.6
and as wide as a finger
10:18.6
based on the height of the building.
10:20.6
So, hindi ko alam kung sino yung sumukat niyan
10:23.6
na pinasok niya yung finger niya dun sa crack
10:26.6
it's as wide as a finger.
10:28.6
that is not a good sign.
10:30.6
So, any crack na kaya mang ipasok yung coin,
10:34.6
that is probably,
10:36.6
most likely structural crack na yun.
10:39.6
Hindi na sya sa palitada lang
10:40.6
o yung tinatawag natin na hair-like cracks.
10:42.6
And if that happens sa construction nyo,
10:46.6
it's best to consult a structural engineer
10:48.6
what next steps to take
10:50.6
para maayos yung ganung klasing crack.
10:53.6
Tiyan po siya siya pito.
10:54.6
Tiyan po siya siya pito.
10:57.6
Tiyan po siya siya pito.
10:58.6
Tiyan po siya siya siya pito.
10:59.6
Tiyan po siya siya siya pito.
11:00.6
Okay. So, yung door nila
11:01.6
may kita natin gawa sa papel
11:03.6
which is medyo common yan.
11:05.6
May mga door talaga na gawa sa papel.
11:07.6
Lightweight sila na doors.
11:08.6
And kadalasan ginagamit lang ito
11:10.6
para sa mga unimportant na partitions.
11:14.6
So, let's say meron kayong pantry,
11:16.6
pwede gawin nyo dun
11:17.6
is yung lightweight lang na door na tulad ito
11:19.6
kasi hindi naman imperative
11:21.6
na walang makapasok na magnanakaw sa pantry.
11:23.6
Anong nanakawin niya?
11:24.6
Yung corned beef nyo.
11:25.6
So, mas importante na solid yung door
11:27.6
sa inyong mga kwarto
11:28.6
para hindi kayo mapasok.
11:29.6
So, dun gagamit tayo ng mga solid na mga panel doors.
11:45.6
This isn't showing the steel of the developers.
11:47.6
It's showing the conscience they have lost.
11:50.6
Let's take a look at the building materials.
11:53.6
There's no cement.
11:54.6
Where did the cement go?
11:57.6
So, yung mga ganitong klase na tinatawag natin na ampaw
12:01.6
ang mga causes nito is one,
12:03.6
not enough cement.
12:05.6
So, hindi enough yung cemento na hinalo.
12:07.6
So, hindi proper yung cement mixture.
12:09.6
Or two, is hindi siniksik maigi
12:12.6
at puro graba lang yung napunta sa isang area.
12:14.6
So, kadalasan pag mabubus ng slab,
12:16.6
dapat meron pa rin tayo nung taga-siksik na ganon
12:18.6
or meron tayo nung nagba-vibrator dun sa ating slab.
12:24.6
And there we go, my dudes.
12:25.6
I guess with that,
12:26.6
dito na natin tatapusin yung ating video.
12:28.6
So, hopefully meron kayong unting natutunan
12:31.6
if the answer to that is yes.
12:33.6
Palike naman itong video.
12:34.6
Kung ayaw niyong,
