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Construction Math For Dummies

 
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Old 06-29-2019, 06:59 AM   #61
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Re: Construction Math For Dummies


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Originally Posted by hdavis View Post
Great work as usual!



On the left, it looks like you are setting and bracing corner studs. Are you taking a chalk line corner to corner, and using that to stand studs to mark in place, or did you come up with a calculated cut list? Or maybe something different?


I decided to set posts for the outside corners, inside corners, and wall intersections along the radiuses first.

Left them long, will trim later.

Had the architects generate the heights at outside of framing plane at those key points.

Then....we just lay out everything meticulously on the deck.
Pull back from each corner to the generated height (minus plates), snap for underside of top plate, pull layout points for everything off of adjacent perpendicular walls, pull numbers for stud lengths off of the edge of the deck....etc...etc.
Snap everything but studs and cripples with Tajima ink lines.
Kings, posts, headers...
(One blown number isnít immediately apparent on this one....so itís nice to have it all laid out.)

After the cut packages are done, itís fairly standard.
Build em on the deck, stand em up, slip them in between the posts.

The day we started the walls I was worried it was going to take forever, but now that we have a system down and found our rhythm, we are cruising.




The next hurdle is framing the radius walls.

The stud lengths are easy enough.
The architects sent the Rhino files of the 3D modeled framing plan to us.
I downloaded a free student version, played with it a bit, and we can get all the numbers from there.

Iím just struggling to figure out how to do the top plates.
They are a radius, that is also descending on a slope.



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Old 06-29-2019, 09:42 AM   #62
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Re: Construction Math For Dummies


I think you're going to be stuck steam bending. A series of posts in the ground that gives you the right curve when it cools. That would be trial pieces to get it dialed in.

It would be easier if it was built up out of the same 3/8" plywood.

Getting the curve calculated isn't bad, it's an ellipse segment with two straight end pieces.
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Old 06-29-2019, 12:48 PM   #63
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Re: Construction Math For Dummies


Quote:
Originally Posted by hdavis View Post
I think you're going to be stuck steam bending. A series of posts in the ground that gives you the right curve when it cools. That would be trial pieces to get it dialed in.

It would be easier if it was built up out of the same 3/8" plywood.

Getting the curve calculated isn't bad, it's an ellipse segment with two straight end pieces.
Too time consuming.
I'm chasing the framing budget as it is.
(Excavation went way (WAY) over my estimate.
Partially because I underestimated it, mostly because the site conditions were so drastically different than the drawings.)

I need a more efficient method.
I'm thinking of laminating in place.
As long as the slope isn't too steep at each location, I think I can do it in 1/2" CDX.

Loads won't really be a factor on those top plates.
I'll just insert studs directly under the rafters after their locations are laid out.

The saving grace of this whole thing as far as the exterior framing plane is concerned......5" of EIFS.
EIFS can hide a lot of things.
Even using the Total Station, the foundation guys weren't dead on exact with their walls. IMO....they did as good as anyone could have.

It was a bear to lay this thing out, even after the foundation was in.
125' of masons twine moves in the slightest breeze....no matter how tight you pull it, and running precise Pythagoreans off two strings is never as perfect as I'd like.
We essentially threw the sill plates onto the foundation walls, got the floor system in......and then laid it out with extreme precision once the deck was on and we had something stable to lay out on top of.
I have a couple spots where the rim is in or out by as much as 1/2".
I try not to let it bother me. (EIFS.....)
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Old 06-29-2019, 02:38 PM   #64
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Re: Construction Math For Dummies


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Originally Posted by BlueRidgeGreen View Post
Too time consuming.
I'm chasing the framing budget as it is.
(Excavation went way (WAY) over my estimate.
Partially because I underestimated it, mostly because the site conditions were so drastically different than the drawings.)
Watched your videos, that dig would have gone over any estimate I would have come up with also. That's a fairly complicated hole in the ground.

I was thinking laminated top plates might be the best way to get the curves you need, but even that won't be easy due to the sloping walls.

You sure did take on a challenging project, I can't wait for more progress pics.
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Old 06-29-2019, 03:16 PM   #65
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Re: Construction Math For Dummies


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Originally Posted by tgeb View Post
Watched your videos, that dig would have gone over any estimate I would have come up with also. That's a fairly complicated hole in the ground.



I was thinking laminated top plates might be the best way to get the curves you need, but even that won't be easy due to the sloping walls.



You sure did take on a challenging project, I can't wait for more progress pics.


You have no idea how many times I wanted to call you.

I had to learn a lot about excavating....real quick.

I rented a backhoe thinking I would just need to scratch a little dirt for the footers and remove a few trees from the driveway.

How wrong I was!
And...how much I didnít realize about the limitations of a backhoe.
I felt like that thing was going to roll over every time I drove over a rock on that original grade....and it wasnít that steep.
I quickly found out, they do a lot of things, but not a lot of things well.

I think I ended up digging something like 200-something truck loads after all was said and done.

I can run that Cat fairly well (well enough)....but had to figure out so much the process of ďexcavationĒ.

Couldnít find a track loader to rent, but one of my lead guys became really proficient on the Bobcat very quickly.

I dug and slung dirt.....he moved it.
Seven days a week, 14 hours a day, for a couple weeks.....just to try to keep the rental costs down.

The one silver lining of the whole dig....
We only hit one small vein of rock, right where my culvert needed to go at the mouth of the driveway.
In ROCKbridge County.
That is simply miraculous. Unheard of around here.
The guy I usually use for my excavating brought his sweet new Hitachi over with the rock hammer and only charged me $100 an hour to use it myself.
(Again...I was shocked ...at how long it took to break such a small amount of rock.)
It was like going from a Ď97 Buick Skylark to a new Lexus though.

He needs a bunch of clean fill (which I have) for a road he has to build.
Iím negotiating for barter.
Iím hoping to get him to finish up the rough grading as he removes it, and then maybe spread my topsoil ....and seed and straw.

But I really donít know what value my fill has ....since he will be doing all the loading and trucking, Iím thinking not that much.




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Old 06-29-2019, 06:39 PM   #66
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Re: Construction Math For Dummies


Nail lam, glue lam or a combination. It's going to take some serious time to get it built up to 3 inches like a double top.....

Some time you'll have to tell about taking the hill top off.

FWIW, one if the local heavy equipment operators rolled a backhoe down a hill when he was 7 yo. They get tippy.
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Old 06-29-2019, 06:58 PM   #67
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Re: Construction Math For Dummies


Any projects needing fill that's relatively close to you?

Around here, if the guy's pit is close to you, you might get it hauled for free if he needs to keep his guys busy.
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Old 06-30-2019, 06:32 AM   #68
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Re: Construction Math For Dummies


You should have called me, I could have taken off and helped out for a long weekend or a couple of days.

And yeah, a backhoe is kinda top heavy and can scare the crap out of you on uneven terrain. I put 2 different backhoes on their sides when I was a youngster, helped me learn their limitations.
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Old Today, 11:03 PM   #69
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Re: Construction Math For Dummies


Quote:
Originally Posted by BlueRidgeGreen View Post
You have no idea how many times I wanted to call you.

I had to learn a lot about excavating....real quick.

I rented a backhoe thinking I would just need to scratch a little dirt for the footers and remove a few trees from the driveway.

How wrong I was!
And...how much I didn’t realize about the limitations of a backhoe.
I felt like that thing was going to roll over every time I drove over a rock on that original grade....and it wasn’t that steep.
I quickly found out, they do a lot of things, but not a lot of things well.

I think I ended up digging something like 200-something truck loads after all was said and done.

I can run that Cat fairly well (well enough)....but had to figure out so much the process of “excavation”.

Couldn’t find a track loader to rent, but one of my lead guys became really proficient on the Bobcat very quickly.

I dug and slung dirt.....he moved it.
Seven days a week, 14 hours a day, for a couple weeks.....just to try to keep the rental costs down.

The one silver lining of the whole dig....
We only hit one small vein of rock, right where my culvert needed to go at the mouth of the driveway.
In ROCKbridge County.
That is simply miraculous. Unheard of around here.
The guy I usually use for my excavating brought his sweet new Hitachi over with the rock hammer and only charged me $100 an hour to use it myself.
(Again...I was shocked ...at how long it took to break such a small amount of rock.)
It was like going from a ‘97 Buick Skylark to a new Lexus though.

He needs a bunch of clean fill (which I have) for a road he has to build.
I’m negotiating for barter.
I’m hoping to get him to finish up the rough grading as he removes it, and then maybe spread my topsoil ....and seed and straw.

But I really don’t know what value my fill has ....since he will be doing all the loading and trucking, I’m thinking not that much.




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Did you use the Track Hoe you own?

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