Car Ports

[jayenram]

Oops.

Edited July 21, 2005 by jayenram

[jayenram]

Does your builder understand the word cantilever ?

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He's not my builder, but no. He eventually added an extra column. Now it looks terrible as he has 2 columns, 1.00 metre apart!

He doesn't understand "more steel", either.

[Thetyim]

Sorry it created such a bad reaction...that wasn't my intent...I thought it was funny...someone making a claim that cement (actually the correct term is 'concrete' since 'cement' is the term for the binder in the concrete that binds the stone and sand together) is a porous material when it is actually used to make boats!!  Can you at least see that in theory this could be considered funny?

Yes I did use the wrong word, I should have said concrete not cement, sorry.

Isn't wood a porous material ?

[chownah]

Sorry it created such a bad reaction...that wasn't my intent...I thought it was funny...someone making a claim that cement (actually the correct term is 'concrete' since 'cement' is the term for the binder in the concrete that binds the stone and sand together) is a porous material when it is actually used to make boats!!   Can you at least see that in theory this could be considered funny?

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Yes I did use the wrong word, I should have said concrete not cement, sorry.

Isn't wood a porous material ?

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I guess "porous" can mean different things and have different results....never really thought about it...wood does have pores but I think that some types of wood have resin filling the pores so water won't go through. Actually concrete has pores too but if made properly there aren't so many and they are very small...even steel (I think) has pores but they are veryveryveryvery tiny or even smaller still....

[RDN]

.. the motorbike deflectors ..

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[iang]

I understand that many English 'classic' car collectors have dehumifiers running 24/7 in their garages, to remove the constant dampness from the ambient air & thus avoid the problem of rust when a car is parked for an extended period in a closed garage.

Similarly some classic car owners park their cars inside inflated plastic cocoons, which have a built in dehumidifier & constantly replaces / recirculates dry air around the car. This way, a wet car can be parked inside & the unit will dry it out & maintain it in a dry condition and thus avoid rusting.

[Thetyim]

Yes I know someone in UK who does that.

He also has a heater element built into it so that the engine is kept at operating temperature.

Been at this temp for the last 30 odd years

[corkscrew]

I have often wondered, as well, about most falang who build their own houses or have one built by a developer and don't have an enclosed garage and electric door opener.

There must be at least 30 falang, or more, in my project and I am the only one with a garage.  And yes, their "carports" only seem to cover half of their vehicles.

After moving in, many buy cheap aluminum covers for their driveways, thus turning, what would otherwise appear to be a nicely designed house, into a "trailer park" look.

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In the car wash.

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But, I overdue things sometimes.

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Yikes, I have two more MBs in sleeper mode.

[ozzydom]

My car port:

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Same,Same RDN, also great for bbq and drying laundry under when we are out.

[ozzydom]

A garage suitable for storing a car should have a sealed floor.

Many owners do not seal the the floor, this results in high humidity and hence promotes rust.

Good point.

Cement is a very porous material and will draw water up from the ground. Raising the humidity in a closed space certainly will promote the chemical (oxidation-reduction) reaction of rusting.

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Yeah, cement is a very porous material...that's why they make boats out of it.

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Chownah

I am sorry to hear such sarcasm from you.

I usually enjoy your contributiions to TV.

And apparently you have never been in a warehouse with a concrete floor after it rains. Those dark spots you see are where the concrete has drawn up the water. I am surprised you do not agree with this well known fact about concrete.

As another poster said, one can seal concrete to overcome this problem.

We use concrete in nuclear physics laboratories to attenuate radiation. It is less effective than lead, but MUCH cheaper. And water porosity is not a consideration.

Again, your sarcasm was surprising. Maybe you just had a bad day.

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Sorry it created such a bad reaction...that wasn't my intent...I thought it was funny...someone making a claim that cement (actually the correct term is 'concrete' since 'cement' is the term for the binder in the concrete that binds the stone and sand together) is a porous material when it is actually used to make boats!! Can you at least see that in theory this could be considered funny?

Anyway. Concrete can be more or less porous depending on how it is made and put in place. It can be very water tight...for example in ferro-cement boat building and in water tank construction...or it can be very porous like in air entrained light weight concrete. One of the many variable in making concrete porous is the amount of water used when mixing. In Thailand alot of water is usually used and this creates a very porous concrete.....I'd say that most concrete in Thailand is porous. In constructing a concrete floor on grade (on grade means on the ground...without an air space below) it is important to assure adequate drainage. This is usually done by putting a layer of gravel or sand down first before the concrete...this gravel or sand layer should be thick enough so that when the water is at its highest point it does not contact the underside of the concrete. Often drainage pipes are placed under the concrete in the gravel/sand layer to allow water a free exit and keep its highest level down. If a floor is constructed this way there will never be wet spots and moisture will not come through the concrete to the interior surface of the floor. If you see wet spots on a concrete floor caused from water from below then either the designer has made a mistake in the design or the constructors did not follow the design properly.

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The modern method of pouring concrete slabs is to lay sheet pvc on a 25mm bed of sand and use one of the many waterproofing compounds in the wet mix,also rate of drying must be slowed down by sprinkling,a lot of porosity is caused by heat drawing the moisture out to fast leaving air pockets behind.

[ozzydom]

I believe this is the case. Study has shown that in most areas, but particularly those of high humidity rust occurs quicker in cars garaged. Unless you are in an area with high acidic rainfall. Then you will probably end up with holes in your hood.

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Rust occurs quicker in cars garaged? You've got to be kidding....if this were true all those people with collections of antique cars would park them outside....

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Don't shoot the messenger I'm not a scientist! Apparently if the cars are totally dried before storage that is fine. But most people drive their cars, which are damp, straight into the garage and leave them. This is what is not fine!

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I'm not shooting...I'm just disagreeing....it is OK to disagree with someone on TV isn't it? You mention that "Study has shown that in most areas, but particularly those of high humidity rust occurs quicker in cars garaged." Can you give me a reference to the study you are referring to? I find it hard to believe the results of this study and I'd like to check it out myself. I have first hand experience in Thailand with steel reinforcing bar and it definitely rusts faster if not kept in a garage. Please note: I'm still not shooting, just trying to learn something.

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When steel contacts water, an electrochemical process starts. On the surface of the metal, iron is oxidised to iron(II):