Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Carpentry

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-18-2008, 12:46 PM   #1
Newbie
 
Join Date: Aug 2008
Posts: 29
Share |
Default

Moving Attic Access -- Same Rafter or Different ??


I am converting my garage into a family room. I have an existing access panel for the garage attic. Problem is that it is located right next to where I want to install a ceiling fan. The fan blades will block the access panel, so I want to move the opening just enough to avoid the fan.

The current opening was made by cutting one 2x10 rafter, and heading it off.

I have 2 choices. I can move my opening like 12 inches North, or like 32 inches West. I need your advice on what is more structurally sound.

For the North option, I would stay in the same rafter bays. I would cut the same rafter another 12 inches or so, and put another header board across.

For the West option, I would jump to a different set of bays. I would cut a new rafter, and add header boards across.

Structurally speaking, which is my better option? Cut the same rafter another 12 inches, or cut a new rafter?

Thanks,
Chris

wrldruler is offline   Reply With Quote
Old 10-19-2008, 06:03 PM   #2
Capra aegagrus
 
Tinstaafl's Avatar
 
Join Date: Sep 2008
Location: Central Pennsylvania
Posts: 22
Default

Moving Attic Access -- Same Rafter or Different ??


Quote:
Originally Posted by wrldruler View Post
Structurally speaking, which is my better option? Cut the same rafter another 12 inches, or cut a new rafter?
Just to pick a nit, those aren't rafters, they're ceiling joists. Rafters run uphill on the underside of the roof.

By having one joist cut apart in the center, you've weakened the overall ceiling structure by X amount. The weight which originally was carried by the cut joist is now being transferred by those "headers" to the joists on each side. Now, if you cut one of those joists, you're essentially doubling the load being transferred via headers.

Unless you have a gazillion pounds of stuff stored up there, either approach would be fine. But ultimately, the better structural approach would be to shift the opening along the length of the already-cut joist.

Tinstaafl is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Thread Thread Starter Forum Replies Last Post
Raccoons in the attic electricpete Pest Control 17 05-12-2011 04:02 AM
Attic fan in Attic access door kubotaart HVAC 10 09-17-2008 12:55 PM
How to seal my attic access - airtight? akoch General DIY Discussions 4 09-08-2008 08:03 PM
moving wiring runs in attic DoubleD07 Electrical 1 07-23-2007 06:44 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.