Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-24-2021, 07:33 PM   #1
1 Rivet Member
 
1978 Argosy 30
Regin , Saskatchewan
Join Date: Feb 2021
Posts: 5
Total Redo! Tank Placement and Frame Strength Inquires!

Hi! Note: I have attached a diagram!!!!



First post. Longtime lurker. Ill keep it short as short as I can.



I have been Renovating a 1978 30 foot Argosy. Its completely stripped.



I need to purchase and place the holding tanks. Fresh, black water, and grey water.



I will be putting a D&M Plastics tank at the front under the seating. It is 290 litres 10" H 27"W 66"L


The back is more complicated as i have moved from a rear bath to a side bath. I will be adding much larger tanks than original (151 litres each)


They will rarely be both full but im concerned about frame strength.



Where and how should i re enforce the frame?


Cheers!
Attached Files
File Type: pdf Tank Layout Rev 2.pdf (59.3 KB, 16 views)
Jesseaf is offline   Reply With Quote
Old 03-24-2021, 07:59 PM   #2
Rivet Master
 
truckasaurus's Avatar
 
1960 33' Custom
Athens , Georgia
Join Date: Jun 2005
Posts: 1,372
Images: 25
I'm not qualified or expert enough to give out frame advice, I just remade mine from 2" x 6" box at the direction of an expert. I thought I'd just offer up https://www.pellandent.com as another source of tanks. I bought from them when I lived in Alberta and recently after my move from Saskatoon to Georgia.
__________________
1960 Sovereign 33' Pacific Railroad Custom
truckasaurus is offline   Reply With Quote
Old 03-24-2021, 09:50 PM   #3
Rivet Master
 
1969 18' Caravel
Greenville , whereEverIroam
Join Date: Dec 2017
Posts: 1,352
Images: 20
This calls for serious engineering. I am not an engineer, but recall one saying once, regarding bridge building, "Anyone can engineer a strong bridge, the trick is designing one that is just strong enough." He was speaking about the trade offs of cost, weight, and strength.

In trailers, you not only have to consider the strength of the frame but overall weight and balance and how that will transfer to the axles/tires (are they strong enough) the tongue, and how it will tow/track/brake once in motion.
skyguyscott is offline   Reply With Quote
Old 03-24-2021, 10:33 PM   #4
Site Team
 
azflycaster's Avatar

 
2002 25' Safari
Dewey , Arizona
Join Date: Mar 2005
Posts: 15,359
Images: 62
Blog Entries: 1
If Airstream was using the same frame construction on the Argosy line that they did on their Airstream line I would have serious concerns with the weight of the size tanks you have listed. The 70s trailers had issues with the frame separating from the body in the rear bath area. Large tanks in the read would only add to the stress in this area.
__________________

Richard

Wally Byam Airstream Club 7513
azflycaster is online now   Reply With Quote
Old 03-24-2021, 11:12 PM   #5
1 Rivet Member
 
1978 Argosy 30
Regin , Saskatchewan
Join Date: Feb 2021
Posts: 5
Thanks for the heads up guys, i think i will get in touch with a couple of structural guys i know.
Jesseaf is offline   Reply With Quote
Old 03-25-2021, 11:28 AM   #6
uwe
418
 
uwe's Avatar
 
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
Posts: 4,804
Images: 41
Send a message via Skype™ to uwe
Quote:
Originally Posted by Jesseaf View Post
Hi! Note: I have attached a diagram!!!!



First post. Longtime lurker. Ill keep it short as short as I can.



I have been Renovating a 1978 30 foot Argosy. Its completely stripped.



I need to purchase and place the holding tanks. Fresh, black water, and grey water.



I will be putting a D&M Plastics tank at the front under the seating. It is 290 litres 10" H 27"W 66"L


The back is more complicated as i have moved from a rear bath to a side bath. I will be adding much larger tanks than original (151 litres each)


They will rarely be both full but im concerned about frame strength.



Where and how should i re enforce the frame?


Cheers!
If your frame is an open to the center "C" channel, then your best bet is to stitch weld flat steel to the open side of the c-channel. minimum 3/16th flat stock. This will give your frame enough strength to carry your load, especially since you have it spread wide over the frame and cross members. You will have to make new cross members or modify what you have and weld them back in place onto he reinforcement stock. I would do this over the entire frame length, all the way to the front. keep in mind where you need to anchor your flooring sheets, for distancing the crossmembers. I looked at your plan, but it does not show detail on how your frame is put together from the factory.
Best,
Uwe
__________________
Uwe
www.area63productions.com
uwe is offline   Reply With Quote
Old 03-25-2021, 11:59 AM   #7
2 Rivet Member
 
1977 31' Sovereign
2017 26' Flying Cloud
Bartlett , TN
Join Date: Oct 2020
Posts: 53
You indicated at least one tank would be placed "at the front". Your drawing didn't show tank placement relative to the axels and floor plan. Keep in mind that the 290 liter tank when full will hold 638 pounds of water. To state the obvious, if this weight were centered exactly between the axels it would all be on the axels. The closer to the the tank moves forward, the more the weight transfers to the tongue. This is not a static load. It is dynamic in that the water sloshes around and the trailer tires hit bumps magnifying the momentary loading. If the tanks will rarely be full, it might be prudent to consider smaller tanks. Any frame overloading will not be given a pass because it happens rarely.
jsaucier 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
Total redo with pex, one drain valve? Northlander Plumbing - Systems & Fixtures 10 11-23-2011 05:09 PM
1978 25' Total Redo Hofarc Member Introductions 4 02-23-2011 07:38 AM
Architect's Airstream - Total Redo mdhofmann General Interior Topics 6 10-17-2010 11:20 AM
Total Redo 1971 31ft Smuzz 1970 - 1973 Sovereign 13 01-15-2007 10:10 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 06:28 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.