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Uploaded At Jul 12, 2024 ^^
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RYD date created : 2024-09-15T16:37:14.064568Z
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Top Comments of this video!! :3
As an engineer that personally inspected almost 100 pier installations, I see a number of problems here:
1. The top 5-6-ft of soil can be super variable, and may or may not have much load bearing capacity. Those pipes do start to get down a couple feet, but I would feel a WHOLE lot better if they were about TWICE as long.
2. Going deeper you have a much higher chance of hitting more and larger rocks and barriers (like dense clay), and I see no way to cap off a pipe.
3. Also, the pipes seem to work in a kind of flexural bearing on the pipes, not direct bearing, tho it is stable when all working together, the basic design requires some thought.
4. And finally, and not least importantly, the rams to install those costs money (rent or own), need to be hauled around, and can break down (seen it happen multiple times).
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Been doing this in Tasmania for over 25 years! All steel 50mm (2ā) internal diameter, three pieces around 20cm (8ā) long each, welded around the outside of a fourth piece, then the unit is hot-dip galvanised. The unit is placed in a hole about a spade depth, and three rods are driven in through the splayed tubes, using a modified jackhammer.
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Ok 2 cents from a geotech engineer here.
If you have a geotech report that i have written and it asked for the end bearing of the footings to be... lets say 200kpa in clay or whatever the natural soil is right?
When i come out and inspect the footings to sign them off you need to dig a hole that the head of your fancy contraption is on the end bearing material specified in my report. I need to confirm the material the footing is on.
Your plan then is to drive steel rods with a hand held jackhammer past 200kpa soil which will get stiffer the deeper you go? Fat chance. These pier holes will normally dug with an auger on a 5 - 7 tonne excavator.
If you say "no the rods are in the material in your report" i will say "prove it".
And before anyone gets up me about asking "well with screw piles you dont see the material at the bottom of the hole" my answer is the piling rig mesures the torque reqiured to turn the piles. The material will have a torque value.
Your jackhammer have a torque gauge?
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@byotshorts
1 month ago
More product info linked in bio under āBYOT Linksā if interested. Thanks for watching!
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