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 02-19-2012, 03:41 PM   #1
Newbie
 
Join Date: Feb 2012
Location: Canada
Posts: 2
Share |
Default

jack post distance


just bought a house went down into the basement and found a jack post not installed there are 4 2x10 bolted together spanning the lenght of the house with 2 jack posts just wondering if anbody knows what the distance between them should be to a max

armor is offline   Reply With Quote
Old 02-19-2012, 03:48 PM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,248
Default

jack post distance


Does not make a lot of since. First you say the post were not installed, then you say there's two of them. Do you mean there's was none in the center?
What do you mean by jack post? Lolley coloums?
Any pictures?

joecaption is online now   Reply With Quote
Old 02-19-2012, 04:00 PM   #3
Newbie
 
Join Date: Feb 2012
Location: Canada
Posts: 2
Default

jack post distance


there are three 2 of them installed 1 not they are Adjustable cylindrical steel posts (jack posts)
armor is offline   Reply With Quote
Old 02-19-2012, 04:18 PM   #4
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Default

jack post distance


Quote:
Originally Posted by armor View Post
just bought a house went down into the basement and found a jack post not installed there are 4 2x10 bolted together spanning the lenght of the house with 2 jack posts just wondering if anbody knows what the distance between them should be to a max
It depends on the distributed floor loading and how much deflection your floor material can stand between the jacks. The worst deflection is maybe L/240, for a span L of 240" you can stand 1" of deflection as measured at span center.
Yoyizit is offline   Reply With Quote
The Following User Says Thank You to Yoyizit For This Useful Post:
armor (02-19-2012)
Old 02-19-2012, 05:03 PM   #5
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 4,178
Default

jack post distance


I am still confused. You say there are two jack posts installed, and you found another not installed. Was it laying on the ground somewhere in the basement? Maybe it was never intended to be installed.

As noted by previous poster, the required spacing between posts depends on the load on the beam, and the size of the beam. I am not going to analyze your setup, too difficult to figure out the variables over the internet, but you really need to verify that the "jack posts" are designed for long term use. Many adjustable columns are designed for temporary use only. The ones rated for long term us should have a stamp on them with a load rating, and the name of the organization that certified the column for long term use.

You also need to verify that the foundation for the posts is adequate. A few pictures might help here.
Daniel Holzman 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
Modified post and beam framing question? diywengr Building & Construction 7 08-11-2010 08:18 AM




Top of Page | View New Posts

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