In “Build a Budget-Friendly Shed” (https://www.finehomebuilding.com/2016/03/06/build-a-budget-friendly-shed), Justin Fink framed the roof for a 10’x16′ shed using 2×6 rafters with a ridge board but no ceiling joists. Would this lead to bowing in the walls supporting the roof? Is this less of a concern for something 10′ wide? I’m building a shed (either 12’x16′ or 10’x20′), and it’s been very difficult finding good information on when it’s OK to simplify roof construction (i.e., most information is tied to house-sized structures with much larger spans).
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Dangerous electrical work and widespread misconceptions cause fires, deaths, and $1.5 billion in property damage annually.
Featured Video
Highlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Fine Homebuilding Magazine
Fine Home Building
Follow
-
Fine Homebuilding
Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.
Start Free Trial Now -
GBA Prime
Get instant access to the latest developments in green building, research, and reports from the field.
Start Free Trial Now
Replies
The purpose of a ceiling joist is to provide horizontal structural strength by fully spanning between both exterior support walls. They transfer the roof loads to the exterior walls, preventing the walls from spreading outwardly (bowing).
Internally the ceiling joists can be supported by beams or interior walls. An alternative method of preventing the walls from spreading is to provide a true ridge beam.
I would suggest getting familiar with Chapter 8 of the residential code and pay special attention to section R802.2 Design and Construction:
https://up.codes/viewer/alabama/irc-2015/chapter/8/roof-ceiling-construction#R802.2