Opening up a load bearing wall means removing studs from the wall reducing it's strength in that area. A header is required to take up this missing support. Something a lot of people don't think of is that the load is now more concentrated at the ends of this header or beam. This means the support posts at the ends of the header or beam may need extra support themselves. If the floor is a wood sub-floor you may have to support the floor from under which could involve more posts and footings below. A lot depends on how much weight this load bearing wall is supporting and how much of an opening is planned. The wider the opening the more critical this all becomes. I would suggest you have a qualified carpenter advise you on this. You can also refer to span tables for your area which should help you determine header sizes, etc.
Time and cost depends a lot on how much work is needed to support the headers.
Before the wall is opened up, a temporary support wall is needed to support the ceiling while the headers and supports are being installed.
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Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.org
Barton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .
[This message has been edited by provip (edited 12-07-2005).]
_________________________
Bart Blainey, B.E.R.
Consultant/Journeyman Carpenter
Building Envelope Specialist
Master Renovator
provip@prodeck.org
http://www.prodeck.orgBarton Blainey (provip) specifically assumes no legal liability or responsibility for the accuracy, completeness or usefulness of any information or process disclosed. The above further expressly advises that any use of or reliance upon the information and or opinion disclosed is at your risk .