I have completed my hoisting apparatus to lift some pieces of Corten steel
up to mount on a false face along the top of the container. The pieces are
84" x 44". I am going to drill two holes, and use two lift points with a
spreader bar so that there is no triangular forces of a lifting bridle.
They will be pre drilled, and once up there, tek screwed in 6 places to
stabilize, then be plug welded in pre drilled holes, one in every valley,
about 7" apart, and 3/8" diameter.

Does anyone know the tearing force for Corten? If I drill a hole 1 to 1.5"
in from the edge in two places, and lift equally, I believe that would be
safe. Also, does anyone know the tearing force for a 1/2" dia. hole in 1/8"
plate? That would be force applied to the hole in a right angle.

I think I am safe here, just wanted to see if anyone knows the figures.

TIA

Steve

"Steve B" fired this volley in
:


I think I am safe here, just wanted to see if anyone knows the figures.

TIA

Steve

Steve,

I don't have the figures on CorTen. But consider ordinary merchant stock
steel. It runs at least 45Kpsi.

Besides, why would you want to drill it to lift it? An 84x44 piece of
corrugated CorTen (what -- 22 gauge?) couldn't weigh more than a couple
of hundred pounds. Simple clamps would do.

LLoyd

A couple of heavy duty C clamps, or sheel lifting clamps, should do
it?

i

On 2011-10-10, Steve B wrote:
I have completed my hoisting apparatus to lift some pieces of Corten steel
up to mount on a false face along the top of the container. The pieces are
84" x 44". I am going to drill two holes, and use two lift points with a
spreader bar so that there is no triangular forces of a lifting bridle.
They will be pre drilled, and once up there, tek screwed in 6 places to
stabilize, then be plug welded in pre drilled holes, one in every valley,
about 7" apart, and 3/8" diameter.

Does anyone know the tearing force for Corten? If I drill a hole 1 to 1.5"
in from the edge in two places, and lift equally, I believe that would be
safe. Also, does anyone know the tearing force for a 1/2" dia. hole in 1/8"
plate? That would be force applied to the hole in a right angle.

I think I am safe here, just wanted to see if anyone knows the figures.

TIA

Steve

"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
.70...
"Steve B" fired this volley in
:


I think I am safe here, just wanted to see if anyone knows the figures.

TIA

Steve

Steve,

I don't have the figures on CorTen. But consider ordinary merchant stock
steel. It runs at least 45Kpsi.

Besides, why would you want to drill it to lift it? An 84x44 piece of
corrugated CorTen (what -- 22 gauge?) couldn't weigh more than a couple
of hundred pounds. Simple clamps would do.

LLoyd

It has to fit flat for attachment. If I had two little plate clamps, maybe.
But the larger ones hit the wall before the sheet does. This needs to be
hoisted in order to fasten it, and the hoisting device can be no more than
1.25" or so thick.

Steve

"Ignoramus20811" wrote in message
...
A couple of heavy duty C clamps, or sheel lifting clamps, should do
it?

i

On 2011-10-10, Steve B wrote:
I have completed my hoisting apparatus to lift some pieces of Corten
steel
up to mount on a false face along the top of the container. The pieces
are
84" x 44". I am going to drill two holes, and use two lift points with a
spreader bar so that there is no triangular forces of a lifting bridle.
They will be pre drilled, and once up there, tek screwed in 6 places to
stabilize, then be plug welded in pre drilled holes, one in every valley,
about 7" apart, and 3/8" diameter.

Does anyone know the tearing force for Corten? If I drill a hole 1 to
1.5"
in from the edge in two places, and lift equally, I believe that would be
safe. Also, does anyone know the tearing force for a 1/2" dia. hole in
1/8"
plate? That would be force applied to the hole in a right angle.

I think I am safe here, just wanted to see if anyone knows the figures.

TIA

Steve

Imagine a sheet of corrugated laying flat on the concrete. That's the way
it has to end up vertical on the face framework. So, I can't use anything
deeper than the sheet's profile is tall.

I think if I just drill two holes and use stout s hooks it should be good to
go. I was just wondering how much tearout force it would take.

Lemme tell you, I wrestled six sheets six by seven feet out of the stack and
on to a table to cut with the torch, then stacked them. By myself. And
I'll probably be hanging these by myself. The smaller 7' x 3.5' sheets are
heavy enough. The big pieces are monstrous to handle for one guy.

Steve

"Steve B" fired this volley in
:

It has to fit flat for attachment. If I had two little plate clamps,
maybe. But the larger ones hit the wall before the sheet does. This
needs to be hoisted in order to fasten it, and the hoisting device can
be no more than 1.25" or so thick.


Then don't drill through it and use hooks _through_ it, tack weld a couple
of hooks to the outside surface, and raise it up dead-flush to the work.
You can grind off the weldments afterwards.

LLoyd

"Steve B" wrote in message
...

The pieces are 84" x 44".
....
Imagine a sheet of corrugated laying flat on the concrete. That's the way
it has to end up vertical on the face framework. So, I can't use anything
deeper than the sheet's profile is tall.

Steve

You can't just wrap two chain or cable slings around it? 1/8" steel weighs 5
lbs per square foot so the sheets are only around 150Lbs.

jsw

"Jim Wilkins" wrote in message
...

"Steve B" wrote in message
...

The pieces are 84" x 44".
...
Imagine a sheet of corrugated laying flat on the concrete. That's the
way it has to end up vertical on the face framework. So, I can't use
anything deeper than the sheet's profile is tall.

Steve

You can't just wrap two chain or cable slings around it? 1/8" steel weighs
5 lbs per square foot so the sheets are only around 150Lbs.

jsw

I was actually thinking of a spreader bar with two chains and two grab hooks
lifting the bottom edge. Then at the top, drilling two very small holes and
tying the sheet to a link at the top. Lift, position, tek, plug weld, cut
wires, drop strain on chains.

I'm trying to think this through, as I am going to probably be doing it by
myself, and don't want any catastrophes. I can enlist some help, but
sometimes, they are more of a hindrance than a help. I really do not have
any buddies who have my metalworking experience.

It's also a 40' run, and I want the ribs on the top extension parapet to
align with the bottom ridges, so it may take a little fiddling.

Sure glad when this mofo is finished. Well, closed up wind and rain
resistant.

Steve

"Steve B" wrote in message
...


"Ignoramus20811" wrote in message
...
A couple of heavy duty C clamps, or sheel lifting clamps, should do
it?

i

On 2011-10-10, Steve B wrote:
I have completed my hoisting apparatus to lift some pieces of Corten
steel
up to mount on a false face along the top of the container. The pieces
are
84" x 44". I am going to drill two holes, and use two lift points with a
spreader bar so that there is no triangular forces of a lifting bridle.
They will be pre drilled, and once up there, tek screwed in 6 places to
stabilize, then be plug welded in pre drilled holes, one in every valley,
about 7" apart, and 3/8" diameter.

Does anyone know the tearing force for Corten? If I drill a hole 1 to
1.5"
in from the edge in two places, and lift equally, I believe that would be
safe. Also, does anyone know the tearing force for a 1/2" dia. hole in
1/8"
plate? That would be force applied to the hole in a right angle.

I think I am safe here, just wanted to see if anyone knows the figures.

TIA

Steve

Cor-ten in thin sections like that has a yield strength of around 50 ksi;
just slightly higher than 1018 or similar low-carbon steels. Like most
structural steels, it's not very strong in the bigger scheme of steel
properties.

--
Ed Huntress


================================================== ====================

Imagine a sheet of corrugated laying flat on the concrete. That's the way
it has to end up vertical on the face framework. So, I can't use anything
deeper than the sheet's profile is tall.

I think if I just drill two holes and use stout s hooks it should be good to
go. I was just wondering how much tearout force it would take.

Lemme tell you, I wrestled six sheets six by seven feet out of the stack and
on to a table to cut with the torch, then stacked them. By myself. And
I'll probably be hanging these by myself. The smaller 7' x 3.5' sheets are
heavy enough. The big pieces are monstrous to handle for one guy.

Steve