Rafter Cable Ties - Building & Construction - DIY Chatroom Home Improvement Forum

 DIY Chatroom Home Improvement Forum rafter cable ties
 User Name Remember Me? Password
 Register Blogs Articles Rewards Search Today's Posts Mark Forums Read

 Thread Tools Display Modes
05-30-2014, 08:43 PM   #1
Member

Join Date: Feb 2009
Posts: 107
Rewards Points: 91

## rafter cable ties

I cant understand this math. ive been over and over it. Each time I get a little further, then I loose it again.

ref:
How to calculate rafter thrust? -Help! at http://www.eng-tips.com/viewthread.cfm?qid=105386

Can someone help me figure cable load?

4/12

24" rafter spacing.

No rafter ties at all. A few existing collar ties.

ceiling joists run parallel to ridge.

house is 27' x 30'(ridge).

7/8" roof planking and asphalt shingles.

thanks,
pa

### Advertisement

05-30-2014, 09:40 PM   #2
Rob

Join Date: Mar 2014
Location: Spring Creek NV
Posts: 1,036
Rewards Points: 826

not sure what we a suppose to look at on link

### Advertisement

 05-31-2014, 10:59 AM #3 Member     Join Date: Apr 2012 Location: Fairhaven, Massachusetts Posts: 2,915 Rewards Points: 2,108 try this .... http://www.timbertoolbox.com/Calcs/RafterThrust.htm __________________ Gary "You get what you pay for, and sometimes free costs more!"
05-31-2014, 11:02 AM   #4
Member

Join Date: Feb 2009
Posts: 107
Rewards Points: 91

Quote:
 Originally Posted by GBrackins try this .... http://www.timbertoolbox.com/Calcs/RafterThrust.htm
I dont know "Load on Rafter (pounds/sq ft)"

pa

05-31-2014, 11:54 AM   #5
Member

Join Date: Apr 2012
Location: UK
Posts: 714
Rewards Points: 502

Quote:
 Originally Posted by paulmars I dont know "Load on Rafter (pounds/sq ft)" pa

You can work out the dead load of your roof by looking in books or tables showing the weight in lbs/per sq ft of various materials.

To this you add the live load - principally snow load - which your local building inspector will be able to tell you.

You add the dead load to the live load to give a total maximum load in lbs/sq ft.

 The Following User Says Thank You to tony.g For This Useful Post: GBrackins (05-31-2014)
 05-31-2014, 11:59 AM #6 Member     Join Date: Apr 2012 Location: Fairhaven, Massachusetts Posts: 2,915 Rewards Points: 2,108 thanks tony! __________________ Gary "You get what you pay for, and sometimes free costs more!"
 05-31-2014, 12:21 PM #7 Member   Join Date: Feb 2009 Posts: 107 Rewards Points: 91 no snow here
 05-31-2014, 01:26 PM #8 Member     Join Date: Apr 2012 Location: Fairhaven, Massachusetts Posts: 2,915 Rewards Points: 2,108 your building code will specify your live load requirement. if you don't know your code your building official will be able to provide that to you. dead load is the weight of the materials used in the construction of your roof. roof dead load can vary from 10 pounds per square foot upwards, all depends on the materials used. __________________ Gary "You get what you pay for, and sometimes free costs more!"
06-14-2014, 08:37 PM   #9
Member

Join Date: Feb 2009
Posts: 107
Rewards Points: 91

Quote:
 Originally Posted by tony.g You can work out the dead load of your roof by looking in books or tables showing the weight in lbs/per sq ft of various materials. To this you add the live load - principally snow load - which your local building inspector will be able to tell you. You add the dead load to the live load to give a total maximum load in lbs/sq ft.
I dont know what type of woods used.

### Advertisement

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are Off Pingbacks are Off Refbacks are Off Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post smata67 Electrical 7 01-21-2012 08:57 AM albanello Building & Construction 10 11-20-2010 11:26 PM ODDJOB72655 Electrical 5 07-20-2010 06:07 AM cmj Building & Construction 6 02-02-2010 11:57 AM cibula11 Building & Construction 23 01-20-2010 07:38 PM

Top of Page | View New Posts

 Terms of Use

Search Engine Friendly URLs by vBSEO 3.6.1