Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-27-2014, 05:33 PM   #1
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
Gantry questions

Today was a decent day on project Airstream. We got the gantries in place and popped the shell off and settled back down on terra firm without any trouble. But where I'm stressing out a bit is lifting and flipping the chassis.

I ran the chains from the hoists around the frame rails just ahead of the bumper and then at the front I ran chain around the A frames just aft of the jack. It all seemed good but as we lifted the chassis the gantry at the front looked a bit sketchy, as if it is bending both across the top horizontal beam and also the verticals; all 4 x 4 construction. I didn't even get the tires off the grass as we were worried that it would all implode in a cloud of splinters.

The hoists are 2 tons each and I used an eye bolt through the beam to mount them but never having done this before I thought I'd get a bit of opinion before I go and get 4 x 6's and rebuild the gantries. The ground isn't overly level so I can block the gantries to get them set up better but will that be enough? Should I take the wheels off?
Attached Thumbnails
Click image for larger version

Name:	IMG_2362.jpg
Views:	186
Size:	241.5 KB
ID:	222984   Click image for larger version

Name:	IMG_2361.jpg
Views:	982
Size:	425.8 KB
ID:	222985  

__________________

__________________
truckasaurus is offline   Reply With Quote
Old 09-27-2014, 05:43 PM   #2
4 Rivet Member
 
Silver Hawk's Avatar
 
1975 31' Sovereign
Palomar Mountain , California
Join Date: Feb 2013
Posts: 353
1. Why are you flipping it over?

2. Top lintel should be 4x6 for sure - 4x4 has no more strength than a tube. Uprights should be o'k in compression. Wonder they didn't split with shell weight.

3. Why not take off tires?

4. Are you going to replace axles? Now would be a good time to remove them - reduce weight and easier.
__________________

__________________
Silver Hawk is offline   Reply With Quote
Old 09-27-2014, 05:45 PM   #3
Rivet Master
 
Mixter's Avatar
 
1976 27' Overlander
Tampa , Florida
Join Date: Oct 2012
Posts: 796
Mine definitely bowed when I lifted my 27'. Not so much that i worried it would break though.
__________________
Mixter is offline   Reply With Quote
Old 09-27-2014, 05:53 PM   #4
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
I'm flipping it now to remove the belly pan etc, then back over to yank the floor off. I need to get down to chassis just to use it as a template for the new chassis. I'll be towing it to a shop for copying hopefully.

So new frame, new axles (I hope from Colin), new floor etc.

I can at this stage just suck it up and work under the chassis but there's no way I'm making new belly pan on a new chassis upside down.
__________________
truckasaurus is offline   Reply With Quote
Old 09-27-2014, 06:00 PM   #5
Rivet Master
 
Mixter's Avatar
 
1976 27' Overlander
Tampa , Florida
Join Date: Oct 2012
Posts: 796
Flipping it was the way to go for me. Made life alot easier for working on the bottom.
__________________
Mixter is offline   Reply With Quote
Old 09-27-2014, 06:19 PM   #6
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
Did you just run chain around the chassis like I did you find a better technique?
__________________
truckasaurus is offline   Reply With Quote
Old 09-27-2014, 06:46 PM   #7
4 Rivet Member
 
millertimeUS's Avatar
 
1976 25' Tradewind
, Florida
Join Date: Apr 2014
Posts: 351
My gantry also bent in at the top, and during the flip my verticals even took a little lean with the horizontal forces of flipping the frame. My 25' frame had tires and axles on. It was a new frame no doubt much heavier than original with floors, then belly pan and tanks. I had one chain just behind the front hoist and two hoists in the back one over each rear axle. Just by lifting one side in the rear I could control rotation pretty easily and safely. It was a little scary seeing that 4x4 flex though.


Sent from my iPhone using Airstream Forums

76 'Airstream Tradewind
__________________
Matt
millertimeUS is offline   Reply With Quote
Old 09-27-2014, 06:48 PM   #8
4 Rivet Member
 
millertimeUS's Avatar
 
1976 25' Tradewind
, Florida
Join Date: Apr 2014
Posts: 351
Click image for larger version

Name:	ImageUploadedByAirstream Forums1411861683.571381.jpg
Views:	236
Size:	767.6 KB
ID:	222989




Sent from my iPhone using Airstream Forums

76 'Airstream Tradewind
__________________
Matt
millertimeUS is offline   Reply With Quote
Old 09-27-2014, 07:02 PM   #9
Rivet Master
 
Mixter's Avatar
 
1976 27' Overlander
Tampa , Florida
Join Date: Oct 2012
Posts: 796
Mine didnt bow that much. But I did not have axles on it when I was flipping it around painting it or working on the bottom. I did not wrap chains because I had a brand new coat of por15. Instead I used the purple straps from Harbor Freight as a sling- one around the tongue so the frame could spin, and 1 over each of the main frame rails on the rear. Worked awesome.
__________________
Mixter is offline   Reply With Quote
Old 09-27-2014, 07:39 PM   #10
Trottinon
 
Cncampers's Avatar
 
1962 19' Globetrotter
Maplewood , Minnesota
Join Date: Jun 2012
Posts: 47
We used 4x6's across the top of our gantries. We only have a 19'. When flipping the frame we tied off one corner of the bumper to the gantry in order to control the flip.


Sent from my iPad using Airstream Forums
Cncampers is offline   Reply With Quote
Old 09-27-2014, 07:55 PM   #11
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
I do like the sling idea, I'm going to borrow that :-) And is see 4 x 6's in my near future, thanks all for the tips.
__________________
truckasaurus is offline   Reply With Quote
Old 09-27-2014, 08:01 PM   #12
Rivet Master
Commercial Member
 
Colin H's Avatar
 
1957 30' Sovereign of the Road
1959 28' Ambassador
1949 24' Limited
Peru , New York
Join Date: Sep 2004
Posts: 740
Quote:
Originally Posted by truckasaurus View Post
I do like the sling idea, I'm going to borrow that :-) And is see 4 x 6's in my near future, thanks all for the tips.
My gantries are steel, with "I" beams across the top.
Colin
Colin H is offline   Reply With Quote
Old 09-27-2014, 08:03 PM   #13
Rivet Master
 
truckasaurus's Avatar

 
1960 33' Custom
Saskatoon , Saskatchewan
Join Date: Jun 2005
Posts: 1,181
Images: 25
Steel would be awesome but then I'd probably have to admit that I might do a third one sometime soon….
__________________
truckasaurus is offline   Reply With Quote
Old 09-27-2014, 08:24 PM   #14
Rivet Master
Commercial Member
 
Colin H's Avatar
 
1957 30' Sovereign of the Road
1959 28' Ambassador
1949 24' Limited
Peru , New York
Join Date: Sep 2004
Posts: 740
Quote:
Originally Posted by truckasaurus View Post
Steel would be awesome but then I'd probably have to admit that I might do a third one sometime soon….
if the shoe fits
__________________

Colin H is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Mexican Insurance Questions, Questions! CaddyGrn Travel Beyond US/Canada 5 02-01-2014 12:23 AM
Dash Repair Questions JW84345 Airstream Motorhome Forums 15 07-15-2012 09:59 PM
Questions, Questions, Questions LowellN Repairing/Replacing Floor &/or Frame 5 10-28-2004 08:23 PM
Polishing questions Charcigar Cleaning, Stripping & Polishing 0 02-27-2002 08:21 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:34 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.