Re: draine pipe sa loob ng poste ng bahay (corner column)

Did you mean you want to embed the drain pipe inside your corner column?

I'd advise against it. Your columns have reinforcing steel bars that are calculated to take the load of whatever it supports. Embedding a pipe while maintaining the original dimensions means less concrete and,hopefully not, less rebar, which would weaken your column.

I also, as a general rule, never "multifunction" any column nor beam. For example, I never drill them for hanging anything nor put any conduits. Not sure if there is a engineering rule against this but I just want to be safe. If, for some reason, you need to repair your drain pipe, it may be tough doing it if it's in a column.

You could hide the drain pipe somewhere else or, expose it outside but apply some treatment (e.g. cladding, vines) to mask it.
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Re: draine pipe sa loob ng poste ng bahay (corner column)

thanks bro. i'll just close it and make another one outside the columns for my drained pipe.will you advise putting a cement and some bars inside the pipe (the one inside the column) to reinforce my column?

Re: draine pipe sa loob ng poste ng bahay (corner column)

Old tech yung inside the post, before kasi those downpipe/downspout are unsightly so what they did was bury it inside walls or columns. But as sir ding said it is very troublesome to repair once it clogs up, so in the end you will just have to put another pipe outside, so ganoon din. Plus once may movement may tendency for it break and may cause water leakage inside your house which is so hard to fix. Safer and easier to maintain yung outside pipes, some just cover it with cement boards or totally get rid of it the Japanese way. Search mo Japanese gutter down spouts and you'll be impressed with their design. Maintenance free sila.
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thanks bro. i'll just close it and make another one outside the columns for my drained pipe.will you advise putting a cement and some bars inside the pipe (the one inside the column) to reinforce my column?

Oh, didn't know the pipe's embedded already. Can't say what you should do then. If the concrete and rebar volume has been calculated and designed considering the void inside, then you can just leave it alone and build a new spout outside for maintainability. Pouring concrete may not be effective since it is not integral to the whole column. Suggest you consult your structural engineer.
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Re: draine pipe sa loob ng poste ng bahay (corner column)

@balarila,

I was actually half-expecting that you'd suggest filling that pipe with epoxy. 😀

Re: draine pipe sa loob ng poste ng bahay (corner column)

tnx sir joey and sir ding. well taken. i'm just going to close it na lang and make another pipe outside. my last concern is, since hindi ko na makita yung engineer na kinuha ng parents ko for the house; do you think yung hole inside the column (because of the pipe) may affect the integral stracture ng columns (or the whole house)?and if yes, any advise what to do with the pipe? (the first floor is already 7years old)? please reply....tnx.

Re: draine pipe sa loob ng poste ng bahay (corner column)

Your initial post is a little vague..is there an actual problem with your embedded pipes? or are you just asking what our thoughts are on embedded drain pipes?

Re: draine pipe sa loob ng poste ng bahay (corner column)

If the pipe is in the centre of the column, then structurally there should be no problem. (The 'over-design' is often some 300%). No its not feasible to fill the pipe with conc. When conc. is poured into so a narrow space, (as this pipe) it invariable blocks so the pipe will not get filled. If you should manage to pour the conc. in such a way that it doesn't block then the constituent elements seperate, so it's no longer conc.
But as others have said maintance is always going to be a problem

Re: draine pipe sa loob ng poste ng bahay (corner column)

If you should manage to pour the conc. in such a way that it doesn't block then the constituent elements seperate, so it's no longer conc.

Frank, how will it not be concrete if it flows through the pipe without blockage?

Re: draine pipe sa loob ng poste ng bahay (corner column)

Better to fill it with concrete aggregates, it will will be just the same as pouring concrete over hollow blocks. You can prevent blockage or hollow areas by using deformed bar to make poured cement compact.
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Re: draine pipe sa loob ng poste ng bahay (corner column)

As Frank said, safety marginin construction is usually tolerant of bad practices. But, a lot of times, I see so many substandard materials and mixtures that I do not rely on those margins anymore. For example, when buying rebars some years back, I was surprised that the hardware store asked me rather nonchalantly if I wanted the standard size or the substandard size. I asked what's the difference and he says they're the same schedule but the substandard one is thinner so I could save some money!
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Re: draine pipe sa loob ng poste ng bahay (corner column)

^ yes sir daming substandard materials since the 90's esp sa mga steel items. Pati common nails substandard na din, it would bend easily.
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Re: draine pipe sa loob ng poste ng bahay (corner column)

thanks..for...sharing...

Re: draine pipe sa loob ng poste ng bahay (corner column)

Frank, how will it not be concrete if it flows through the pipe without blockage?

Because when conc. is poured in such a small space, (such as a pipe) the constituents tend to separate. To pour into such a small space would mean the conc. would need to be very watery, thus further reducing the strength of the mix.