Ontario Building Code （2）5寸厚；（3）10m 钢筋间隔20公分；（4）10m钢筋锚固在墙上，间隔60公分。Builder 用wire mesh不能作为范例，那是偷工减料，因为通常这种小地方政府不坚持一定先验收后灌混凝土。
-2841999(四友);
2020-5-17(#12961299@0)+1
You are quoting 9.39.1.4. But read 9.39.1.1. "This Section does not apply to reinforced concrete slabs intended to support motor vehicles". The code requirement is 3" thick with wire mesh reinforcement. I can't remember which section it came from though.
-jeffrey815(Smartiecat);
2020-5-17(#12961765@0)
Read Page 8. 3" poured concrete slab. Optional welded wire mesh in center of slab. 4" compacted granular fill.
-jeffrey815(Smartiecat);
2020-5-18(#12963255@0)+3
This is standard Toronto Area Chief Building Officials Committee (TACBOC) detail drawing for residential garage, in compliance of Ontario Building Code: 75mm POURED CONCRETE SLAB, OPTIONAL WWM REINFORCING IN CENTER OF SLAB
-jeffrey815(Smartiecat);
2020-5-18(#12963259@0)+3
I just want to remind you that what he is quoting 9.39.1.4 does not apply to garage. The Ontario code has always been 3 inches with optional wire mesh reinforcement for garage.
-jeffrey815(Smartiecat);
2020-5-18(#12964877@0)
Thanks. I got it. All the quotes so far came to me with wire mesh and minimum 5" thick for the slab. But rebar was optional.
-firestone(42K);
2020-5-18(#12965345@0)
That is just bullshit they are cheating you. If the original thickness is 3 inches and they said they would do 5 inch that means they are going to remove 2 inch of gravel so you are losing 2 inch of gravel!
-jeffrey815(Smartiecat);
2020-5-19{234}(#12966674@0)+1
But gravel is just as important as the concrete itself to support the weight of the slab and car. Unless they remove all the gravels and dig deeper to remove 2 inch of extra soil under the gravel, what they proposed do not make sense!
I will be watching on site for sure. But you had a good point.
-firestone(42K);
2020-5-19(#12966771@0)
It's also agreeing on the scope of work. If they are not going to dig 2 inch deeper and replace all the gravel vs. they are not going to dig, the cost is very different.
-jeffrey815(Smartiecat);
2020-5-19{109}(#12966812@0)
Having said that, I agree with others you are looking for a cosmetic make over and you don't need to do this.
是貴，面積350平方尺，Quotes are over $5000
-firestone(42K);
2020-5-18(#12964692@0)
no way it has wire mesh or steel rod in the concrete. You have to remove the whole thing
-jeffrey815(Smartiecat);
2020-5-16(#12960026@0)+3
We did a large garage concrete floor resurfacing a few years back in the same way. And a few flood control structures.
-troyd(Covid32);
2020-5-17(#12960038@0)
Maybe US standards is different than Canada.
-jeffrey815(Smartiecat);
2020-5-17{213}(#12960855@0)+2
Did you use steel mesh or steel rod in your project? How can you only remove the surface in a residential project where contractors simply use jack hammer to break the concrete (where it will simply rip it apart)?
I don’t think all Canadian residential slabs are 3-4 inch deep. If they are, then you are correct. And I hope these houses can last.
-troyd(Covid32);
2020-5-17(#12960879@0)
3~4" is the standards in Canada. That is why you reinforce with steel rod or mesh 6~8" of gravel under. They all last.
-jeffrey815(Smartiecat);
2020-5-17(#12960918@0)+4
3-4” under a house? LOL. It would make sense to me the thinnest edge of garage is 4” then it will go thicker.
-troyd(Covid32);
2020-5-17(#12960926@0)
Yes. Ontario code requires only 3" inch thick so all the houses are built based on this standard.
-jeffrey815(Smartiecat);
2020-5-17{228}(#12961771@0)+3
Builder typically will not go above the minimum code requirements. Nothing wrong with that. You should check your local building code. I will be surprised if it is very different as North American building codes are all similar.
I did a quick google search and the code requirements for Florida is 3 1/2 inch thick with wire mesh reinforcement for garage
-jeffrey815(Smartiecat);
2020-5-18(#12963262@0)+2
That's the answer I've got from 2-3 builders. I originally wanted to resurface it. Of course people may say the bigger the project is, the more they could make out of it.
-firestone(42K);
2020-5-18(#12964723@0)
The problem is it is impossible. Residential contractor only uses 重型冲击钻. It's impossible for them to remove 2 inch of surface when the total thickness is just above 3 inches. When they use jack hammer, it will just break the whole thing into pieces.
-jeffrey815(Smartiecat);
2020-5-18(#12964868@0)
Really makes sense now. Thanks man.
-firestone(42K);
2020-5-18(#12965354@0)
