that's good that u curious on the thing u saw around u.

that 1 actually is ultimate load test on the completed piling work. test the integrity of the designed bearing capacity. the big big cube is the weight to be loaded on the completed piling work. to test if the pile can withstand those loading b4 build the real structure on top.

something like this:
pile working load test with Kentledge method

opps, we google the same thing
coincidence la

Hey, anyone pro in piling works?

Mind to tell me what is the method to check the verticality of bore hole before casting and even after casting?

This post has been edited by fondo: Dec 6 2014, 01:01 PM

hi, how to calculate how much consume for cement and sand for a 1:3 25mm thk cement screed?
let say like 1000 ft2, how many pack of cement and how many pack of sand? does it calculate in m3?

A 150mm RC slab are usually how many layer of layer of cement and how many layer of netting? how thk are the cement every layer? the cement mixture are 1:3 also?

is every column have ground trench linked to other column? only footing alone not enough?

are very staircase must have at least 1 shear wall? some have 2?

if a more than 2 storey building wana do extention, how do rebar of new beam connect to existing structure?

You guys need to learn to summon the respected person or at least give a quote to get his attention.

kuchiyose sensei iwubpreve

thanks you sir.

iwubpreve appreciate your help

1 bangla like that they pay how much ?

the use cheap raw material that can cause bangunan roboh?

Concrete memang got many grade one.

And in contact memang got state what grade to be used.

B4 casting, the concrete will be tested, so under all this standard operations and QC (form work, reinforcement and casting process), shouldn't had materials quality issue.

This post has been edited by Human10: Dec 8 2014, 10:30 AM

you guys need geological, mineral, slope, geomorphological and terrain mapping and construction suitabilty map services, can PM me.

TQ

This post has been edited by zaini900: Dec 8 2014, 11:03 PM

can i renovate my house to make it bigger without increasing the assessment?

(1)
very easy to calculate. for 1000ft2 of 25mm thk 1:3 cement sand screed = 92.93m2 (convert to meter square) = 2.32m3 (convert to m3)

cement density is 1600kg/m3
sand density is 1700kg/m3

2.32m3 x 0.25 x 1600kg = 928kg
928kg / 50kg = 18.56 or 19 bags allow some wastage la 21 bags.

(2)
there is no layer of cement. it's concrete which is the mixture of cement, sand and aggregate. the ratio is 1:3:6 for grade 30 or grade 40 concrete if I still can recalled. they either use rebar or wire mesh. 2 layer usually, top 1 bottom 1.

(3)
depend on design. footing alone usually enough. however some case they require tie beam connecting all the footing / pile cap.

(4)
shear wall required to resist the lateral load especially on high rise building, the wind load is increasing as the building is higher. therefore shear wall is require. they will positioning the shear wall at the center of building. if the building is big, then they will position it center of each half of the building. staircase and lift core is the place they choose to form the shear core by constructing the shear wall.

(5)
u need to drill a hole to existing structure and plant a rebar as dowel bar. then new beam rebar will lap to that dowel bar. usually engineer will recommend how long the depth require to embed the dowel bar and what type of epoxy glue require. these are the thing u not suppose to propose urself instead get their approval to use as that would be the integrity of structure.

generally u need approval from local authority irrespective whether it has or doesn't has anything to do with structural integrity.

nowadays agent will charge main con abt 80 per bangla. then they actually pay 40 to that bangla
per day.

provided it's approved material then it won't la. nowadays china product is cheap and compatible to client need. ur roboh more on structural element. provided those structural element of product is accepted by consulting engineer, it won't collapse.

Hi,

Just asking whats the standard format of a Practical Completion Certificate?

do u have a copy/template?

thx!

another question

can u gib the way how they songlap in construction field?

selective tender. mean the tender is not transparent. in open tender, after all the bidding process, they will publish from lowest bidder to highest bidder. then who are the 1 selected. in selective tender, none would be shown. see the detail price and u will shock when got songlap.

I see my neighbour so rich work as contractor. He has no degree.
Possible or not without degree learn how to construct? Maybe for small scale one, not building tower.

&

Example renovate a toilet. Maybe got remove the old tiles and wall. Replace with new marble, new paint, new pipe. Why the contract charge so expensive like near to 10k ? Workmanship so expensive one?

This post has been edited by owenwong84: Dec 9 2014, 08:14 PM