Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 03-16-2012, 09:55 AM   #1
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Share |
Default

Bridging ceiling joists


Mid 80's rambler- 2x6 top and bottom chords on stick built rafters w/ 2x4 webbing. I want to remove some interior wall to open the main living area to an open great room. HOW DO I BRIDGE ABOVE THE CEILING JOISTS? It will be 24' clear span for 13' of the living area. I am told the rafter design affords the ceiling joists carry ceiling load only and not roof load down to the wall I want to shorten.


Last edited by Sully5455; 03-16-2012 at 09:58 AM.
Sully5455 is offline   Reply With Quote
Old 03-16-2012, 11:53 AM   #2
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 4,202
Default

Bridging ceiling joists


I really did not understand your post at all. So let's start from the beginning. You say you have 2x6 top and bottom chords with 2x4 webbing on stick built rafters. The term "chord" usually refers to a truss. Stick built rafters are not generally trusses. So we need to start by establishing if you have trusses or conventional rafters. A few decent photos would help immensely. If you are not familiar with the difference between a truss and a rafter system, the truss is generally prefabricated triangular elements, often 2x4's, usually put together using gang nailing plates (unless it is a home made truss). Rafters are commonly 2x6 or perhaps 2x8, attached to a ridge board at the top, and usually nailed to the floor joists on the wall.

I do not understand what you mean by the words "bridge above the ceiling joists". Maybe post a picture, or try explaining exactly what it is you want to accomplish. Bridging usually refers to horizontal blocking between joists, I am relatively confident this is not what you are talking about.

Then you refer to removing "some interior wall". Is this a load bearing wall, or are you not certain if it is load bearing? Post a picture. Generally trusses span full width between outside walls (not always), and require no interior support. Ceiling joists, on the other hand, are often supported near the mid point using a bearing wall.

Daniel Holzman is offline   Reply With Quote
The Following User Says Thank You to Daniel Holzman For This Useful Post:
Sully5455 (03-17-2012)
Old 03-16-2012, 04:34 PM   #3
Framing Contractor
 
Join Date: Apr 2006
Location: Caldwell, NJ
Posts: 1,758
Default

Bridging ceiling joists


Quote:
Originally Posted by Sully5455
Mid 80's rambler- 2x6 top and bottom chords on stick built rafters w/ 2x4 webbing. I want to remove some interior wall to open the main living area to an open great room. HOW DO I BRIDGE ABOVE THE CEILING JOISTS? It will be 24' clear span for 13' of the living area. I am told the rafter design affords the ceiling joists carry ceiling load only and not roof load down to the wall I want to shorten.
There are no top and bottom chords in a stick built roof.
__________________
Joe Carola
Joe Carola is offline   Reply With Quote
The Following User Says Thank You to Joe Carola For This Useful Post:
Sully5455 (03-17-2012)
Old 03-17-2012, 11:53 AM   #4
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Default

Bridging ceiling joists


Boys, I could not explain it any better. I never used the word truss they are rafters w/ ridge board. But due to the heavy snow loads where I live (I assume)they put webbing from center of building at the ceiling joist and angled them to center of the rafter boards on each side (this was done every 4' the rafters are 16" oc). Im thinking of engineered 2x12's (2 of them) on top of the ceiling joists strapped to the joists(a strong back as you will). Basically I want the beam above the joists to allow for a clean flow across the ceiling w/o the beam showing in the living area.

Last edited by Sully5455; 03-17-2012 at 11:57 AM.
Sully5455 is offline   Reply With Quote
Old 03-17-2012, 12:00 PM   #5
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Default

Bridging ceiling joists


I know that I need to start at the foundation to allow any change in loads up top be properly transfered through and down to the foundation without adding thrust to walls.
Sully5455 is offline   Reply With Quote
Old 03-17-2012, 12:20 PM   #6
Framing Contractor
 
Join Date: Apr 2006
Location: Caldwell, NJ
Posts: 1,758
Default

Bridging ceiling joists


Quote:
Originally Posted by Sully5455 View Post
Boys, I could not explain it any better. I never used the word truss they are rafters w/ ridge board.
Sully,

Just so you know, buy using the word chord, you are referring to a truss without saying the word truss.
__________________
Joe Carola
Joe Carola is offline   Reply With Quote
The Following 2 Users Say Thank You to Joe Carola For This Useful Post:
Msradell (03-17-2012), Sully5455 (03-17-2012)
Old 03-30-2012, 11:44 AM   #7
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Default

Bridging ceiling joists


Daniel, have you formulated an idea of how to open the ceiling with the above joist beam? I do appologize for my shortness earliier my ex husband was nagging me. I do thank you for any and all help in this matter.
Sully5455 is offline   Reply With Quote
Old 03-30-2012, 11:50 AM   #8
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 4,202
Default

Bridging ceiling joists


Maybe I was not clear. I DID NOT understand what it was you are trying to accomplish. I suggested that you post pictures. Without pictures I certainly cannot steer you in any direction. Remember, this is an internet forum where NO ONE has seen your house, and it is difficult, frustrating, and time consuming to speculate about how to accomplish something without a really good description of what you have to start with, and what you want to end up with. And pictures. There are plenty of people on this forum with lots of framing and design experience, they will be happy to help out, but we have to understand exactly what it is you want to do.
Daniel Holzman is offline   Reply With Quote
The Following User Says Thank You to Daniel Holzman For This Useful Post:
Sully5455 (03-31-2012)
Old 04-12-2012, 02:58 PM   #9
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Default

Bridging ceiling joists


I hope this will help you understand what I have and what I would like to do.
Attached Thumbnails
Bridging ceiling joists-100_1306.jpg   Bridging ceiling joists-100_1308.jpg   Bridging ceiling joists-100_1309.jpg   Bridging ceiling joists-100_1312.jpg  
Sully5455 is offline   Reply With Quote
Old 04-12-2012, 03:05 PM   #10
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Default

Bridging ceiling joists


sorry skipped one
Attached Files
File Type: zip house2.zip (39.5 KB, 31 views)
Sully5455 is offline   Reply With Quote
Old 04-12-2012, 10:13 PM   #11
Member
 
Join Date: Dec 2011
Location: zentral Iowa
Posts: 1,201
Default

Bridging ceiling joists


I want to hear what feedback you get from those photos.
cleveman is offline   Reply With Quote
The Following User Says Thank You to cleveman For This Useful Post:
Sully5455 (04-13-2012)
Old 04-12-2012, 10:15 PM   #12
Member
 
Join Date: Dec 2011
Location: zentral Iowa
Posts: 1,201
Default

Bridging ceiling joists


Looks like your bearing wall is offset from the center. Nothing wrong with that. So you should be able to eliminate your hallway wall which is not under the bearing point (where the ceiling joists come together and rest on a wall).
cleveman is offline   Reply With Quote
Old 04-13-2012, 10:54 AM   #13
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Default

Bridging ceiling joists


What do you think about the four feet i want to remove from the kitchen/dining area?
Sully5455 is offline   Reply With Quote
Old 04-13-2012, 11:34 AM   #14
Member
 
Join Date: Dec 2011
Location: zentral Iowa
Posts: 1,201
Default

Bridging ceiling joists


Looks like you can remove anything which isn't under the bearing wall.
cleveman is offline   Reply With Quote
The Following User Says Thank You to cleveman For This Useful Post:
Sully5455 (05-04-2012)
Old 06-22-2012, 08:22 AM   #15
Newbie
 
Sully5455's Avatar
 
Join Date: Mar 2012
Location: Frozen tundra of north central US.
Posts: 12
Default

Bridging ceiling joists


How big of beam will be required under the ceiling joist lap for a twenty foot long opening?

Sully5455 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
Garage ceiling joists and beam question Truth Building & Construction 8 01-05-2012 07:52 PM
Adding ceiling joists in garage raley Building & Construction 6 11-02-2011 07:44 AM
Sagging Ceiling Joists Steve Burke Carpentry 12 12-13-2009 05:18 PM
Ceiling joists support beam ptcamaro Building & Construction 3 06-17-2009 10:14 AM
locating ceiling joists magal2005 General DIY Discussions 2 12-12-2007 10:17 AM




Top of Page | View New Posts

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