Enough of COVID...what are you doing to the house? | Page 338 | GTAMotorcycle.com

Enough of COVID...what are you doing to the house?

GreyGhost said:
Thanks for sending. I looked through it. This isn't an official review (as I am entirely unqualified) just the things I noticed that stood out.

Prepared by a structural engineer working for a structural engineering company.

No lateral capacity. If lateral forces exist, a lateral restraint must be used. I suspect nobody does this.

They do not rely on soil/shaft friction for capacity (good because there wouldn't be much).

Pile capacity is closely related to soil. You must know the makeup prior to installing piles. I suspect nobody does this. The whole point of screw piles is fast and minimally invasive, you aren't digging a pit to look and you sure as hell aren't getting a geotech report.

Standard height of 50" with 1.875" pitch. So about 25 full rotations to install.

6" diameter plate.

Some strange remarks that are probably related to engineer being ESL (eg. Electrical soldering on a drawing).

I think most of my confusion comes from rule of thumb calcs for bearing capacity of poured concrete cylindrical footings. The normal numbers are 2000 psf for sand and 1500 psf for clay. How do the screw piles which rely only on bearing capacity of the helix use a bearing capacity well above 8000 psf? Answer is above my pay grade.
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I looked through the pylex catalogs for our local hardware place and there are versions of the screw piles with a lateral restraint welded to the top of the pile. I guess you sledge hammer the last few inches in to set them.
 
jc100 said:
I looked through the pylex catalogs for our local hardware place and there are versions of the screw piles with a lateral restraint welded to the top of the pile. I guess you sledge hammer the last few inches in to set them.
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The ones with plates welded to the top are for fences. They auger out the top of the hole to make room for the plates and then backfill so they have something to push on. Seems janky. Installation video had them screwing in, sledgehammering, screwing out, sledge hammering, , screw in, sledge hammering, screw in, sledge hammering, backfill and compact. I am going with almost 100% odds that on site it will be spun to the bottom and called done.

They also sell plates for the normal piles where you hammer the plates in after the pile is set.

EDIT:
 
GreyGhost said:
Thanks for sending. I looked through it. This isn't an official review (as I am entirely unqualified) just the things I noticed that stood out.

Prepared by a structural engineer working for a structural engineering company.

No lateral capacity. If lateral forces exist, a lateral restraint must be used. I suspect nobody does this.

They do not rely on soil/shaft friction for capacity (good because there wouldn't be much).

Pile capacity is closely related to soil. You must know the makeup prior to installing piles. I suspect nobody does this. The whole point of screw piles is fast and minimally invasive, you aren't digging a pit to look and you sure as hell aren't getting a geotech report.

Standard height of 50" with 1.875" pitch. So about 25 full rotations to install.

6" diameter plate.

Some strange remarks that are probably related to engineer being ESL (eg. Electrical soldering on a drawing).

I think most of my confusion comes from rule of thumb calcs for bearing capacity of poured concrete cylindrical footings. The normal numbers are 2000 psf for sand and 1500 psf for clay. How do the screw piles which rely only on bearing capacity of the helix use a bearing capacity well above 8000 psf? Answer is above my pay grade.
Click to expand...
Thanks for having a look. Since I'm not planing on hanging a house over the edge of a cliff but do plan to build a backyard shed, I'm feeling a little more confident these would suffice.
Have a family member looking at this that works in an engineering firm. Not exactly what they do but he'll have a look.
 
AllistonGT said:
I have a slope or I would probably do this.
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I’ll call a few other guys. This was just the first one I saw on marketplace.

Batched 3 bags with dad today for some work around the house…wasn’t too bad in all honesty. I should call in all the favours I did for friends with their renos.
 
Screw piles are not new , they have been used as wind anchors on utility poles for decades . The engineering is pretty sound , imo . I would use them for a shed or deck with no issue . Key so I’m told by a guy that installs them is smooth consistent screwing in so you get firm soil are the pile , not a wiggly wonky push .


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crankcall said:
Screw piles are not new , they have been used as wind anchors on utility poles for decades . The engineering is pretty sound , imo . I would use them for a shed or deck with no issue . Key so I’m told by a guy that installs them is smooth consistent screwing in so you get firm soil are the pile , not a wiggly wonky push .


Sent from my iPhone using GTAMotorcycle.com
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Professional screw piles installed by machine (basically hydraulic motor) are great. Correlation between applied torque and bearing capacity is decent (within about +/- 15% but factor of safety of two is used in design so that is fine). Walking in a circle with a 2x4 is not as smooth and you arent checking applied torque (although you could with a little effort).
 
Buddy put up one of those plastic sheds in his Alliston backyard.

No screw piles, no posts, no concrete pad.

4 blocks to hold the 2x4s square in the corners, some tamped down gravel, and placed the shed on top.

It survived 1 season. The whole thing is twisted and doors no longer close.
 
mimico_polak said:
Buddy put up one of those plastic sheds in his Alliston backyard.

No screw piles, no posts, no concrete pad.

4 blocks to hold the 2x4s square in the corners, some tamped down gravel, and placed the shed on top.

It survived 1 season. The whole thing is twisted and doors no longer close.
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There are places where you could build a high rise on that.

Millennium Towers

 
Contractor that has been working in our nieghbourhood installs screw piles with two methods , Bobcat that has a post hole digger / gets used to screw in piles , he also has a big gas powered hole digger with an attchement and screws them in. It looks like those beaver hole diggers you can rent. He said it generates a bit more torque than a post hole digger , but at slow speed it just pops in .
 
Spent a summer with a real good shed builder. In an afternoon we'd raise and shingle a 16x12 "shed".
All we every used was paving stones at each corner and maybe a few inside that on a larger shed. Used shingles to shim it up.
 
nobbie48 said:
There are places where you could build a high rise on that.

Millennium Towers

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That tower is a %*^show. The retrofit seems to be on the build first check for suitability after approach. As long as you are doing something, hopefully people will ignore what is happening. Yet another reason not to buy a condo.

Another look into that mess. Obviously this guy thinks highly of himself but he seems competent and his logic seems sound.
Did I Uncover a $100,000,000 Mistake with the Millennium Tower "Fix"?
 
Like the look of stucco…but taking it off…effing hell

Neighbours will have styrofoam in their lawns for months.

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24E12AFA-7069-4D4B-BAB7-A9F6CF3DC5E8.jpeg

Can’t blame Kevin for this one. But curses to the Polak that did this
 
backmarkerducati said:
Always remove white Styrofoam from your house when there is snow on the ground, better yet when it is snowing.... When it all metls you can deny, deny, deny....
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Whatever mess he thinks he made will be trivial compared to using the rasp on the foam to flatten it out when installing eifs. Forget spare pieces, your neighbours lawn may be barely visible through the foam.
 
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