Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-02-2013, 02:11   #1
Registered User
 
Shanaly's Avatar

Join Date: Oct 2010
Location: Perth west australia, Indian Ocean
Boat: Samson C-Falcon 41'9" composite ketch (designed by Cece Norris)
Posts: 226
What are the SWLs for Aluminum Sections?

Just looking at putting out 2 'beams' from the stern about 2 meters long to put the RIB on. Will be supported by sleeving inside similar 'socket sections' onboard, and with standing rigging to mizzen head from the outboard end.

As an example I have seen rectangular section 100mm x 50mm x 3mm, but I have no idea what SWL that would be. (6mm is also available)

Does anyone know what a MPa is, and whether it refers to deflection over a given length??

How about approximations to kg/m?

I fancy an I beam as it will be easier to fit wood slats into it - how much weaker is it?

Or should I bite the bullet and go for steel...?

any websites or engineers beginners guides welcome!

thnx
__________________
Shanaly is offline   Reply With Quote
Old 01-02-2013, 02:19   #2
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
Re: What are the SWLs for Aluminum Sections?

For structures in Aluminium it is typically the deflection that you can accommodate rather than the SWL.

Just a guess, but your biggest issue may be deformation and failure where the beam meets the socket. Other than that, the section you have chosen is likely quite stiff enough for your task ... unless its a proper RIB with 200HP engines
__________________
daddle is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:58.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.