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Old 02-12-2020, 01:07 AM   #1
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Chipboard or plywood


Hi, does anyone know whatís the stronger of the two to drop rocks from a tip truck on, chipboard or plywood. Iíve got about 150 tons of blue metal coming and Iíve only got a concrete driveway to deliver it to and I donít want to spend more on wood than on the rocks, Greg
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Old 02-12-2020, 05:32 AM   #2
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Re: Chipboard or plywood


OSB would be cheaper. Neither will be pretty after the delivery. Strength for that job is probably not an issue since you are looking for a cushion. 150 tons is a lot of weight for a driveway. Hopefully it will be spread out either by time or space.
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Old 02-12-2020, 07:49 AM   #3
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Re: Chipboard or plywood


Quote:
I’ve got about 150 tons of blue metal coming
Ayuh,..... I gotta ask,....... What is Blue Metal,..??..??
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Old 02-12-2020, 07:56 AM   #4
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Re: Chipboard or plywood


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Ayuh,..... I gotta ask,....... What is Blue Metal,..??..??
It is a stone. I googled it.
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Old 02-12-2020, 10:32 AM   #5
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Re: Chipboard or plywood


whatever you decide to use, buys lots. 150 tons is a lot of volume.
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Old 02-12-2020, 10:37 AM   #6
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Re: Chipboard or plywood


Used building material store?
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Old 02-12-2020, 11:25 AM   #7
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Re: Chipboard or plywood


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150 tons is a lot of weight for a driveway.

I think that like 10 dump trucks.
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Old 02-12-2020, 12:18 PM   #8
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Re: Chipboard or plywood


+1 on the driveway weight

a six wheel may hold 8-10 tons
a triaxle may hold 12-15 tons
a tandem could be 18-25 tons, but I wouldn't want one on my driveway, plus may have interference with power lines or trees
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Old 02-12-2020, 03:44 PM   #9
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Re: Chipboard or plywood


^ True story.

We had a bunch of dump truck loads of gravel and top soil driving on the second (unpaved) driveway and it made a bit of a mess. Tore up the driveway (ruts that filled with water for over a year), possibly broke the natural gas line to the shop, and broke our sump pump line from the basement.

I could argue the latter two weren't buried deep enough, but it was the dump trucks going on it that caused problems. I remember they said they didn't want to drive on our asphalt driveway; said it was too thin and they'd smush it. Said they'd smush the unpaved drive too (the ruts), but we didn't care 'bout that - didn't realize how shallow the NG and sump pipes were until after the damage was done though.
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Old 02-12-2020, 04:40 PM   #10
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Re: Chipboard or plywood


Neither will cause the concrete to not crack and break. Neither is good for cushioning that much weight, plus the sudden contact the stone will make when they hit. How thick is the concrete? How much rebar per square foot? I would tell them to dump it on the grass, but to roll the trucks over the sidewalk, not the driveway. It will break under the weight of the truck alone, especially if it is 4 inches or less.
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Old 02-14-2020, 02:31 PM   #11
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Re: Chipboard or plywood


With that kinda weight, I would follow the above and have that dumped somewhere other then the driveway unless you want to replace the driveway after.

I'd rather deal with damage grass and compressed earth than replacing a driveway!
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Old 02-15-2020, 12:45 AM   #12
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Re: Chipboard or plywood


I have a properly installed heavy duty gravel driveway. I have backed 10 wheelers with 22 tons on board into my driveway without leaving a tire imprint. That is what you get with a foot of #2 crusher run, topped with a few inches of #1 crusher run. With #1 stone on top. 40 years of use packing it down. It is hard as hell.
Whether your driveway can take it is a function of how strong your driveway is.
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Old 02-16-2020, 03:19 PM   #13
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Re: Chipboard or plywood


I would dump straight onto the concrete. When the dumping starts rocks will hit the concrete but they are going to be softer than fully cured concrete and then the rocks that follow will be hitting the rocks already on the concrete.

The only reason to use OSB is to keep the rock from possible transferring some color to the concrete but a pressure washer should take care of it should it occur.

Crushed rock will weigh about 2700 lbs per cubic yard and so a 6 yard dump truck will have a total weight of more than 20,000 lbs on the rear wheels and a good steel reinforced and fully cured concrete slab should be able to support this amount of loading as it is going to be rated for at least 4000 psi.
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