Frame opinion - Mountain Buzz
 



Reply
 
Thread Tools Display Modes
 
Old 02-01-2017   #1
 
Salina, Utah
Paddling Since: 2008
Join Date: Mar 2016
Posts: 19
Frame opinion

I'm looking to build a frame in the next couple weeks. What is everyone's thoughts on raft frame rails? Double or single rail?? Commercially all I've really used is double side rails. Is there a real benefit? Or is it just extra weight and welding?

raftguide08 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-01-2017   #2
 
elkhaven's Avatar
 
Belgrade, Montana
Paddling Since: 1991
Join Date: Sep 2013
Posts: 2,195
They have a point and a benefit for some applications. If they have a deck associated with them they offer strapping alternatives and facilitate movement around the boat. I saw a huge difference going from single rail to a decked double rail with my dogs and kids stability when moving back and forth. I won't put them on my small boat, but for the main boat I think they are priceless. Not decked I don't see an advantage. And you can deck single rail frames. I guess I'd say it depends on your goals for the frame.

Sent from my SM-G930V using Mountain Buzz mobile app
__________________
"If you dont do it this year, you will be one year older when you do"
-Warren Miller
elkhaven is offline   Reply With Quote
Old 02-02-2017   #3
 
Aurora, Colorado
Paddling Since: 2000
Join Date: Apr 2006
Posts: 623
I like double rails with decking. You can strap things to them, but you can do that nearly as easily without decking, and even with just a single rail (although the strapping can get more creative). My reason for liking the decking is simply moving safely about the boat carrying gear. I've worked full seasons on boats without, and IMO, for how often guides are on and off of boats with heavy gear, it's just a safety issue.
climbdenali is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 02-02-2017   #4
 
Willi..., Willimina, OR
Paddling Since: 68
Join Date: Jan 2007
Posts: 482
Double rail vs single rail

Quote:
Originally Posted by raftguide08 View Post
I'm looking to build a frame in the next couple weeks. What is everyone's thoughts on raft frame rails? Double or single rail?? Commercially all I've really used is double side rails. Is there a real benefit? Or is it just extra weight and welding?
A double rail raft/cat chassis transmits load from the intermediate cross bars to the inner longitudinal rails and then on to the transverse end cross bars. This reduces the moment and subsequent deflections in the cross and longitudinal members, aka, makes it stiffer. For narrow frames, the stiffness is insignificant. For large frames, 67 to 80" width, the affect is quite pronounced. For strapping and rigging, a strap attached to the inner rail affixing cargo is substantially stronger since the angle between the frame and the tension is >>0 eliminating the tangent multiplier.
__________________
Gary Foam
Proclaimed Lobbyist for Whitewater
garystrome is offline   Reply With Quote
Old 02-02-2017   #5
 
elkhaven's Avatar
 
Belgrade, Montana
Paddling Since: 1991
Join Date: Sep 2013
Posts: 2,195
Yeah what he said... and they look cool and stuff.
__________________
"If you dont do it this year, you will be one year older when you do"
-Warren Miller
elkhaven is offline   Reply With Quote
Old 02-02-2017   #6
 
Salina, Utah
Paddling Since: 2008
Join Date: Mar 2016
Posts: 19
Thanks everyone for the input. I have enough aluminium to do double rails, so that is like what I will do. All I've really ever rowed are double railed frames, I guess I thought that the main benefit of them was they are stronger/hold up to more abuse and constant trips all season long. For a private boaters frame doing around 4 short trips a year i wouldnt think it would make a huge difference, but since I've got the metal, I might as well make it bomber. right?
raftguide08 is offline   Reply With Quote
Old 02-02-2017   #7
 
Clancy, Montana
Paddling Since: 1999
Join Date: Nov 2014
Posts: 18
I started with a single rail and then redesigned to a double and add side decks as shown
PAU in a NRS is offline   Reply With Quote
Old 02-02-2017   #8
 
Denver, Colorado
Join Date: Aug 2015
Posts: 507
I'm working on a simple, decked, four bay, single rail frame based on Gary's t-fittings, locally sourced aluminum pipe and half inch baltic birch. I'm pretty happy with the way it is shaping up. (and I'm putting it on a PVC raft, so don't tell Gary).
markhusbands is offline   Reply With Quote
Old 02-02-2017   #9
 
Salt Lake City, Utah
Paddling Since: 2008
Join Date: Mar 2010
Posts: 491
I have a frame for sell that could be made into a double rail. Comes with trucker seat on a flip rig. 500.00
tanderson is offline   Reply With Quote
Old 02-02-2017   #10
 
Salina, Utah
Paddling Since: 2008
Join Date: Mar 2016
Posts: 19
I guess my other question is, what is the average distance from the seat that my oar towers should go? Or is just what ever I like. I have a small (12') raft with a really small, basic day trip frame that I've always felt the towers are too close on, so I sit on the cooler to get a few more inches of room
raftguide08 is offline   Reply With Quote
Reply


Thread Tools
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
Topic Thread Starter Forum Replies Last Post
Frame to raft fit... Your opinion/experience? LochsaIdaho Rafting | Gear Talk 10 10-17-2013 08:45 AM
Raft opinion Rschap Rafting | Gear Talk 7 06-28-2009 08:32 AM
your opinion please! SleepyMonkey Kayaking | Gear Talk 3 04-12-2006 07:41 AM
Opinion on Facemasks? allgood Whitewater Kayaking 25 06-25-2004 11:29 AM
opinion??? Matt Whitewater Kayaking 1 10-27-2003 05:41 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 04:55 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.