#1  
Old 29-05-2018, 06:59 PM
Allan's Avatar
Allan
Registered User

Allan is offline
 
Join Date: Feb 2013
Location: Newcastle
Posts: 937
ROR Gantry Framing

Any engineers out there? I’m trying to work out how many columns to use to hold up the gantry rail section that the roof rolls onto. I would prefer the minimum number, but obviously don’t want to end up with an unstable structure that I have to retro fix.

Roof is 7m x 5.5m and will weigh around 600kg. The columns will be 140x140 supporting a 190x45 timber on edge with the steel track sitting on top of the timber.

Two columns means a 3.5m span between columns. I could bring the end column in by 1m and cantilever the track off the end, so the span drops to 3m. Three columns drops the span to around 2.3m.

Any guidance will be appreciated.
Reply With Quote
  #2  
Old 29-05-2018, 07:44 PM
Wilso
Registered User

Wilso is offline
 
Join Date: Nov 2016
Location: Adelaide
Posts: 414
I'm just a simple carpenter, ...like God

You need to select what type of timber for the beam 190x45 to help you in the right direction. 3.5m span is too far from memory.
Permapine Pine, tru-pine, lvl (laminated veneer lumber), hardwood etc....
-Continuous span you can counter leverage.
-Lvl/hardwood will span further.
-Your local timber supplier can help you out.

Cheers
(for that size structure council would req. engineers calculations etc)
Reply With Quote
  #3  
Old 29-05-2018, 08:25 PM
Allan's Avatar
Allan
Registered User

Allan is offline
 
Join Date: Feb 2013
Location: Newcastle
Posts: 937
Thanks Darren. In the absence of any conclusive guidance, I will do three columns for a 2.3m span, just to be on the safe side.

The observatory is in a remote spot, and very neatly avoids all the requirements for council approval. Hence no engineering drawings.
Reply With Quote
Reply

Bookmarks

Thread Tools
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

Forum Jump


All times are GMT +10. The time is now 06:47 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Testar
Advertisement