LumberJocks

How do they bend huge pieces like this?

  • Advertise with us

« back to Woodworking Skill Share forum

Forum topic by nickbatz posted 03-25-2020 02:00 AM 812 views 0 times favorited 29 replies Add to Favorites Watch
View nickbatz's profile

nickbatz

421 posts in 760 days


03-25-2020 02:00 AM

We went to a chamber music concert in a church a couple of weeks ago.

How do they bend huge pieces like this arch? Are there factories with giant steam-bending setups?

I wondered the same thing about the banisters at Disney Hall here in Los Angeles.

TIA


29 replies so far

View nickbatz's profile

nickbatz

421 posts in 760 days


#1 posted 03-25-2020 02:01 AM

Man. I have no idea why pictures are rotated 90˚ left here. Rotating and reposting doesn’t work.

Well, it doesn’t affect my question.

View MrUnix's profile

MrUnix

7838 posts in 2879 days


#2 posted 03-25-2020 02:23 AM

-- Brad in FL - In Dog I trust... everything else is questionable

View bigJohninvegas's profile

bigJohninvegas

741 posts in 2142 days


#3 posted 03-25-2020 02:23 AM

The sideways photo has to do with what direction the camera was when you took the photo.
And I have never understood why it makes a difference, but obviously it does.
So to fix it. All you got to do is edit the original photo. Crop it, but only take like a 1/16” off the top, or one side. and save it. That edited photo will post to this web site properly.

I worked for a big casino here in Vegas oh 30 odd years ago. We had a in house wood shop. And I remember seeing a couple of arches set up in forms. Left there for years, like a spare part they knew they were going to need someday. Never saw how they did the steam end of it, but they said that’s how it was set up.

-- John

View ChefHDAN's profile

ChefHDAN

1554 posts in 3529 days


#4 posted 03-25-2020 03:56 AM

I’ll put my chips on a lamination bend

-- I've decided 1 mistake is really 2 opportunities to learn.. learn how to fix it... and learn how to not repeat it

View DS's profile

DS

3423 posts in 3100 days


#5 posted 03-25-2020 03:56 AM

There are a number of techniques and methods to bend arches like these. Which one you use will depend on your tools, the requirements of the project and how many clamps you have.

I usually start with a form for clamping. A simple flat profile like that one can use a couple of layers of either kerfcore or bender board which can be trimmed and edged after gluing up. This is the easy method.

If it must be solid wood, due to strength, or special profiles, or pride, it will involve a steam bending setup, clamps and lots of muscle.

Alternatively, there is a commercially available product that compresses boards end to end to accordion the fibers and make it easier to bend, but it is expensive.

If you search here and on other sites, you will find more details on each of these methods and probably others.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View shipwright's profile

shipwright

8496 posts in 3478 days


#6 posted 03-25-2020 04:02 AM

I imagine the same way we bent ribs in bigger boats. This picture is a smaller one but the big ones are done much the same. Not hard. Just nice hot wet steam.

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

View Sylvain's profile

Sylvain

983 posts in 3179 days


#7 posted 03-25-2020 11:04 AM

video of compression steam bending

another one without compression.

-- Sylvain, Brussels, Belgium, Europe - The more I learn, the more there is to learn

View Tony_S's profile

Tony_S

1190 posts in 3763 days


#8 posted 03-25-2020 11:41 AM

As romantic as the the though of steam bending might be, I highly doubt that was the method used in this instance.
If someone were to request this of me, it would be a bent lamination, no question. Steam wouldn’t even be on the radar.
I’ve bent a thing or two…

-- “Wise men speak because they have something to say; fools because they have to say something.” – Plato

View JackDuren's profile

JackDuren

999 posts in 1639 days


#9 posted 03-25-2020 12:56 PM

Are we sure it’s one bend or several?

View TechTeacher04's profile

TechTeacher04

433 posts in 2211 days


#10 posted 03-25-2020 01:03 PM

+1 for bent lamination.

View shipwright's profile

shipwright

8496 posts in 3478 days


#11 posted 03-25-2020 03:30 PM



As romantic as the the though of steam bending might be, I highly doubt that was the method used in this instance.
If someone were to request this of me, it would be a bent lamination, no question. Steam wouldn t even be on the radar.
I ve bent a thing or two…

- Tony_S

Yeah, you’re right Tony (of course) I just like looking at pictures of me when I was young! :-)

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

View Tony_S's profile

Tony_S

1190 posts in 3763 days


#12 posted 03-25-2020 04:45 PM


I just like looking at pictures of me when I was young! :-)
- shipwright

And a cool picture it is! Are you the one with the clamp?

-- “Wise men speak because they have something to say; fools because they have to say something.” – Plato

View pottz's profile

pottz

8471 posts in 1664 days


#13 posted 03-25-2020 10:19 PM

since there is more than one way to do just about everything in woodworking id say your both correct.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View nickbatz's profile

nickbatz

421 posts in 760 days


#14 posted 03-25-2020 10:35 PM

100% it’s not laminate, it’s solid Douglas fir. Same thing at Disney Hall.

Look at the grand piano for scale. I think Shipright and Sylvain have the answer.

Also, the orientation of the camera may be the issue, but I rotated the pictures in Preview (Mac) and saved them. No help – unless I save it in… I think screenshots are .png format, but I forget.

Anyway, thanks for the replies.

View shipwright's profile

shipwright

8496 posts in 3478 days


#15 posted 03-26-2020 01:18 AM


I just like looking at pictures of me when I was young! :-)
- shipwright

And a cool picture it is! Are you the one with the clamp?

- Tony_S

No I’m the meat bending the rib. :-)

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese! http://thecanadianschooloffrenchmarquetry.com/

showing 1 through 15 of 29 replies

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com