DIY Doctor

Main navigation

ceiling joist spans

Postby fenderman » Thu Dec 11, 2008 11:09 am

Can anyboby tell me the span for 6"x 2" at 8"/ 200mm centres or if they were doubled ie bolted together to be 6"x 4" at 16"/ 400mm centres
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Thu Dec 11, 2008 10:59 am

Postby stoneyboy » Sat Dec 13, 2008 10:41 am

There is not straight answer to this question.
If you were to use graded timber (C14) and it was 150x50 at 400mm centres the beams could take a UDL of 75kg/sqm over a 3m span. Your suggestion to double up the timbers and double the centres would make no gain.
Rank: Project Manager
Posts: 5340
Joined: Wed Dec 10, 2008 6:44 pm

Postby Perry525 » Tue Dec 16, 2008 6:50 pm

It is traditional to increase the thickness of a joist where it will carry the weight of an upstairs fireplace or to double the joists when carrying a upstairs block wall.
What are you trying to do?
Rank: Site Agent
Progress to next rank:
Posts: 734
Joined: Fri Jul 06, 2007 7:35 pm

Postby TheDoctor5 » Fri Jan 30, 2009 9:16 am

If you type the key words of your question into our search box to the left of the site you may find the answer is already posted or is in the DIY projects section of the website. Every post goes through a monitoring process and using the search box may speed up your answer.
Posts: 1381
Joined: Tue Jan 20, 2009 9:17 am

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics