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Old 07-22-2010, 08:59 PM   #1
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Removing posts in basement ?


I have two supporting posts on one half of my basement that i'd like to remove to enlarge the living space.

The posts are current ' in wall '

The living space length is approx 18-20 feet, and the posts are at the approx 5 feet and 14 ft mark ( guesstamate )

the current floor joists are not full length peices, they are two peices that meet on top of the current wall where the posts are in.


Is it possible / budget practical to remove the posts with the use of a enginnered wood beam for the 20 feet or so of the living space in the basement? i'd only be gaining approx 3 feet or so of extra width.


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Old 07-22-2010, 09:02 PM   #2
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Removing posts in basement ?


Single story, double story, wall above...snow load ?
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Old 07-22-2010, 09:55 PM   #3
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Removing posts in basement ?


Single story ranch, my think my hallway wall is directly above.

Central nj , medium snow load
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Old 07-22-2010, 09:57 PM   #4
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Removing posts in basement ?


Anything is possible. I could not even begin to estimate costs. You would need to have a structural engineer give you a drawing of what is needed to remove the posts and then get estimates.
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Old 07-22-2010, 11:12 PM   #5
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Removing posts in basement ?


First off, I would invest in a tape measure so you can accurately measure distance. Estimates are not adequate when sizing a beam such as you contemplate.

Second, I don't understand your comment about only gaining three feet of extra width, from your description there are two posts and a wall in the middle of the room, by replacing the wall with a beam you would remove the wall from the room, unless I am missing something in your discussion.

For the 20 foot span, you should consider a steel beam, less depth than a Glulam, might not be any more expensive than a Glulam in this case.

As for doing this work yourself, think long and hard before you undertake this type of project, you are going to need temporary support for the joists, and installation of a heavy beam is difficult without jacks, and especially without some experience. Improper temporary support can lead to collapse of the house. Improper sizing of the beam can lead to long term structural problems. This may be a job for a professional, in which case they would be happy to quote you a price.
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Old 07-23-2010, 03:28 AM   #6
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Removing posts in basement ?


I own a tape measure, I don't think it's nessasary to have to the inch measurements when asking some general questions


The beams are within a wall in the center of the basement, see picture.

The current room is approx 20x 12. The hope is to increase the width to the max, which is another 3 feet or so. Which would be it since my boiler is in the way

Quote:
Originally Posted by Daniel Holzman View Post
First off, I would invest in a tape measure so you can accurately measure distance. Estimates are not adequate when sizing a beam such as you contemplate.

Second, I don't understand your comment about only gaining three feet of extra width, from your description there are two posts and a wall in the middle of the room, by replacing the wall with a beam you would remove the wall from the room, unless I am missing something in your discussion.

For the 20 foot span, you should consider a steel beam, less depth than a Glulam, might not be any more expensive than a Glulam in this case.

As for doing this work yourself, think long and hard before you undertake this type of project, you are going to need temporary support for the joists, and installation of a heavy beam is difficult without jacks, and especially without some experience. Improper temporary support can lead to collapse of the house. Improper sizing of the beam can lead to long term structural problems. This may be a job for a professional, in which case they would be happy to quote you a price.
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Old 07-23-2010, 10:11 AM   #7
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Removing posts in basement ?


Quote:
Originally Posted by alecmcmahon View Post
The current room is approx 20x 12. The hope is to increase the width to the max, which is another 3 feet or so. Which would be it since my boiler is in the way
It occurs to me that if you're looking to reclaim some space from the boiler room, thereby making the boiler room smaller (if I'm understanding you correctly), you might be creating a problem of inadequate combustion air for your boiler. Or maybe not -- something to investigate anyway. Good luck.
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Old 07-23-2010, 07:49 PM   #8
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Removing posts in basement ?


I recently did a basement remodel for a client that wanted to remove 2 lally columns to open up a room to make way for a pool table, a very similar situation to what you describe.

After going over the specs with my engineer, we decided to use a steel beam rather than engineered lumber, with the steel I only needed a 12" beam to span 22', with engineered beam I would of needed an 18" beam, which would of made head room a problem.

You definitely should consult with an engineer.

cost of steel beam 1k
cost of engineered lumber $700

I would definitely check (or have checked by a pro) what is above that hallway wall.

Unless you are very comfortable tackling a project of this type, I would highly suggest talking to some professionals.
What is the existing beam, and how is it constructed?
Any chance you could just remove the wall and leave the posts and beam in place?

Is 3 feet really worth all the hassle?


Last edited by NHNailbangah; 07-23-2010 at 08:02 PM.
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