DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Framing and Foundation > anchor for steel column post




Reply
 
Thread Tools Search this Thread Display Modes
Old 05-29-2012, 12:28 AM  
minimii
Junior Member
 
Join Date: Dec 2011
Posts: 27
Default anchor for steel column post

Hello, everybody.
I am replacing the load bearing wall with a steel beam supported by three 4" steel column posts. There is just one floor of bedroom and bathroom above the beam supports. I dug a little bit of where the steel column posts supposed to stand. It is on the old foundation, looks like some type of cinder block. And the where the posts going to be looks like was filled with cement.

My question is, should rebuild the footing, i.e. dug big holes and fill them with cement, or just drill holes and fill with threaded rod and anchor adhesive?

If I have to dug and rebuild the post footing, how big does it need to be?
If just drill holes, how thick and how long the threaded rod need to be?

Thank you very much.



__________________
minimii is offline  
 
Reply With Quote Quick reply to this message
Old 05-29-2012, 01:32 AM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 10,742
Liked 925 Times on 826 Posts
Likes Given: 1595

Default

Mini; The curb and footing under the old barring wall was designed to carry the load evenly spaced over the entire length and now you are going to drop half of the load in a 4" area and the out side foundation wasn't designed for any of this load. I hate to sound like a broken record but if you don't want to hire an engineer, you would be better to over kill it. The outside walls will only be taking 10 to 20% of the load but I don't know enough about block to give good advice.
That center post is most problimatic. If a wall is feet high it helps spread the load to the footing but often the curb wall footing is just below the floor and needs to be redone. For bolting things down anchor bolts work really good.



Through_Bolt_Wedge_anchor.jpg  
__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Old 05-29-2012, 07:57 AM  
minimii
Junior Member
 
Join Date: Dec 2011
Posts: 27
Default

Thanks, nealtw.
If I dig and rebuild a footing for the center post, what size should it be?

__________________
minimii is offline  
 
Reply With Quote Quick reply to this message
Old 05-29-2012, 08:20 AM  
nealtw
Contractor
 
Join Date: Nov 2010
Location: vancouver, b.c.
Posts: 10,742
Liked 925 Times on 826 Posts
Likes Given: 1595

Default

All I can tell you is a point load footing is never less than 10" deep and 24" sq and more depending on the load and soil condition and has to be on undesturbed soil. They add a grid of rebar.

__________________
nealtw is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

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


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Preparing footing surface for steel column MoreCowbell Bricks, Masonry and Concrete 19 08-29-2012 08:59 AM
Steel vs. Masonry Column Footing Thickness MoreCowbell Framing and Foundation 3 07-24-2011 09:38 PM
steel pipe for porch column chouston General Home Improvement Discussion 1 04-18-2011 07:40 PM
Wood vrs Steel post beam support mschmit Framing and Foundation 2 12-31-2008 11:07 PM
replace wood column with steel column? Dave928 Framing and Foundation 5 07-05-2008 10:17 PM

Newest Threads

LATEST SPONSOR DEALS