Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-26-2015, 12:35 PM   #1
3 Rivet Member
 
1973 23' Safari
1970 27' Overlander
Boerne , Texas
Join Date: Jun 2015
Posts: 179
wood splice really needed?

I thought the answer to this question was already out there, but could not find. The smaller cross member (4 in wide vs. 5 inch wide) near the rear of my safari needs replacing. It is this cross member where two pieces of plywood meet and there is the plywood splice on top of the cross member. I want to put a gray water tank from VTS in this area and use the 4 3/4 inch deep tank to give me more capacity. To do this, I was going to have my welder place the angle flush with the frame, which would leave no room for the plywood splice. To add strength and increase the surface area of contact on the plywood, I was going to double up the angle to form a "T". In addition, route a 1/8 inch deep pocket across the top of the plywood joints to fit a few metal ties across the joint. I believe this would provide adequate strength.

Anyone see a problem with this?
Greg
__________________

__________________
Greg1410 is offline   Reply With Quote
Old 10-26-2015, 01:55 PM   #2
Rivet Master
 
Belegedhel's Avatar
 
1973 21' Globetrotter
Houston , Texas
Join Date: Sep 2009
Posts: 2,198
I think the big reason for the splice in the original design was just that the top of the cross member was only about an inch wide, which didn't even leave space to sufficiently get a screw through the each part of the floor and into the meat of the cross member.

If you have a biscuit jointer, you could join the edges of your plywood with glue and biscuit joints, or even do a rail and stile joint if you have a router and the appropriate bits. If you are really worried about the joint, cut some giant dovetails in the two pieces that will straddle the cross member (but this is admittedly overkill).

good luck!
__________________

__________________
Belegedhel is offline   Reply With Quote
Old 10-26-2015, 03:35 PM   #3
3 Rivet Member
 
1973 23' Safari
1970 27' Overlander
Boerne , Texas
Join Date: Jun 2015
Posts: 179
Thanks - I like the biscuit idea - i have a friend who has one.
Greg
__________________
Greg1410 is offline   Reply With Quote
Old 10-26-2015, 03:42 PM   #4
Rivet Master
 
Aerowood's Avatar

 
1971 21' Globetrotter
Arvada , Colorado
Join Date: May 2006
Posts: 2,840
If you have access to a router then you could also use a spline. Cut a 1/4" groove down the center of each half and glue in a 1/4" spline the complete length of the joint.
Aerowood is offline   Reply With Quote
Old 10-26-2015, 03:46 PM   #5
Rivet Master
 
Aerowood's Avatar

 
1971 21' Globetrotter
Arvada , Colorado
Join Date: May 2006
Posts: 2,840
wood splice really needed?

Quote:
Originally Posted by Belegedhel;



If you are really worried about the joint, cut some giant dovetails in the two pieces that will straddle the cross member (but this is admittedly overkill).



!

Dovetails, unique idea, I like it
Aerowood is offline   Reply With Quote
Old 10-26-2015, 04:51 PM   #6
Patriotic
 
Chuck's Avatar

 
1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
Posts: 4,533
Images: 260
how would dove-tails work? one of the floor sections would need to be >48" wide; the original edges of the boards would have to overlap.

While you're in there, think about the support for that 4 3/4" tank...there is like "no" room to spare. (going through this, now). I'm not liking the way the tank sags when its full of water, and the mfg sez that the tank should be "fully supported" on the bottom.
I'm bolting a 1/8" aluminum plate to the bottom of the x-members. It would probably have been easier/cheaper if I had this worked out when the welder was doing the other work I had done, and had him create some angle-iron supports that are supported by the main frame rails...then those could have supported a 1/2" plywood "floor" to support the tank. It would have to hang down below the bottom of the frame rails a little bit, similar to the way the fresh tank is supported.
__________________
Air:291
Wbcci: 3752
'73 Safari 23'
'00 Dodge Ram 1500 4x4 QC
Chuck is offline   Reply With Quote
Old 10-26-2015, 04:53 PM   #7
Rivet Master
 
J. Morgan's Avatar

 
1972 31' Sovereign
1975 31' Excella 500
Currently Looking...
Benton , Arkansas
Join Date: Mar 2013
Posts: 5,040
Images: 11
wood splice really needed?

A wider welded in edge will do all that you need done without the hassle.

I think you had the right answer from the get go.

Brevi tempore!
__________________
The fact that I am opinionated does not presuppose that I am wrong......

J. Morgan is offline   Reply With Quote
Old 10-26-2015, 07:34 PM   #8
3 Rivet Member
 
1973 23' Safari
1970 27' Overlander
Boerne , Texas
Join Date: Jun 2015
Posts: 179
Chuck - thanks for the suggestion - I have a welder coming along sometime in the next month. Sounds like I might be better off sacrificing capacity and getting the 3 3/4 tank. Is that something you would do over as well?

By the way, how many straps did you use to support the tank?
Greg
__________________
Greg1410 is offline   Reply With Quote
Old 10-26-2015, 07:36 PM   #9
3 Rivet Member
 
1973 23' Safari
1970 27' Overlander
Boerne , Texas
Join Date: Jun 2015
Posts: 179
one more thing - I would definitely want to get access to the tank, if needed, through the belly pan - don't want to have to rip up the new floor and everything else. IF the angles supported a piece of plywood, there would have to be some sort of give there.
__________________
Greg1410 is offline   Reply With Quote
Old 10-26-2015, 07:53 PM   #10
Patriotic
 
Chuck's Avatar

 
1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
Posts: 4,533
Images: 260
Quote:
Originally Posted by Greg1410 View Post
Chuck - thanks for the suggestion - I have a welder coming along sometime in the next month. Sounds like I might be better off sacrificing capacity and getting the 3 3/4 tank. Is that something you would do over as well?

By the way, how many straps did you use to support the tank?
Greg
well, no...I just coulda planned it differently, that's all.
3 straps on the little tank, but I'm going to lay a 1/4" piece of plywood on top of the straps, to help support the tank bottom.

If you used angle irons that spanned between the frame rails, one could be fixed in place; the other could be bolted to "ears" that could be welded to the frame, and could be un-fastened, and then the angle could slide back out of the way, allowing the tank to drop down.

OR go all the way and have a galvanized box made with flanged edges, and bolt that up to the underside of the x-members using rivnuts. You could make the box big enough to be lined with rigid foam, to insulate everything...like the factory does.
__________________
Air:291
Wbcci: 3752
'73 Safari 23'
'00 Dodge Ram 1500 4x4 QC
Chuck is offline   Reply With Quote
Old 10-27-2015, 08:06 AM   #11
3 Rivet Member
 
1973 23' Safari
1970 27' Overlander
Boerne , Texas
Join Date: Jun 2015
Posts: 179
Thanks Chuck. Did you expand the depth of your cross members? If they are the standard 5 inches deep and your tank is 4 3/4, along with straps and 1/4 inch plywood - seems too tight?
__________________
Greg1410 is offline   Reply With Quote
Old 10-27-2015, 12:37 PM   #12
Rivet Master
 
Royce's Avatar
 
1977 Argosy Minuet 6.0 Metre
Colorado Springs , Colorado
Join Date: Dec 2003
Posts: 716
Images: 9
Quote:
Originally Posted by Aerowood View Post
If you have access to a router then you could also use a spline. Cut a 1/4" groove down the center of each half and glue in a 1/4" spline the complete length of the joint.
Quick, easy, strong. Best recomendation yet and will not add any weight to the coach. I use about 2000 biscuts a year and I can say for sure the spline is much better in this case. As long as you use glue and the spline fits correctly.
__________________
Royce (K0RKK) 146.460 simplex
Web page http://spearfishcreek.net/
AIR# 3913
'77' Minuet 6 Metre, behind a 2005 stock Jeep Rubicon with Equa-L-Zer hitch.
Royce is offline   Reply With Quote
Old 10-27-2015, 02:10 PM   #13
Rivet Master
 
1996 25' Excella
Tillsonburg , Ontario
Join Date: Aug 2014
Posts: 787
I'm certainly no expert on vintage AS, but the manufacturer supports the plastic bladder tanks on Styrofoam sheets in a fabricated galvanized box hung under the frame. I think any plastic tank needs full sheet support, not straps.
JCW
__________________
JCWDCW is offline   Reply With Quote
Old 10-27-2015, 06:31 PM   #14
Patriotic
 
Chuck's Avatar

 
1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
Posts: 4,533
Images: 260
Quote:
Originally Posted by Greg1410 View Post
Thanks Chuck. Did you expand the depth of your cross members? If they are the standard 5 inches deep and your tank is 4 3/4, along with straps and 1/4 inch plywood - seems too tight?
stock 5" x-members;

4 3/4" tank will be supported by a 1/8th thick aluminum plate bolted to the underside of the x-members...leaving 1/4" space at the top.

3 3/4" tank will be supported by 1/8th thick straps, + 1/4 (or even 3/8ths) plywood....still room.

whacky? yes. Its a work in progress.
__________________

__________________
Air:291
Wbcci: 3752
'73 Safari 23'
'00 Dodge Ram 1500 4x4 QC
Chuck 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
'76 Safari wing window 'splice bar' wanted nhdubfan Windows & Screens 15 08-10-2009 10:50 PM
Longer Battery Cables - Replace or Splice? RDM16CCD Batteries, Univolts, Converters & Inverters 3 02-26-2007 11:01 PM
Electric wire splice on magnets LI Pets Brakes & Brake Controllers 15 09-03-2006 12:45 AM
Really, Really, Really Hot swebster Airstream Motorhome Forums 8 11-16-2003 09:46 PM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:20 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.