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Old 06-30-2010, 09:24 PM   #16
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Cutting concrete foundation for door, is it safe?


Quote:
Originally Posted by Scuba_Dave View Post
Not always true on older houses
I have floor joists landing on the top of my basement windows without any header
It's possible that the header is raised - i.e. what appears to be rim joist was actually sized to function as a header.

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Old 06-30-2010, 11:05 PM   #17
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Cutting concrete foundation for door, is it safe?


Did anyone catch the fact his property is on a slope? You should consider drainage as part of this design so you don't end up with water issues.
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Old 07-01-2010, 06:10 AM   #18
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Cutting concrete foundation for door, is it safe?


as sketched & w/your information, i'd do it in my home,,, just ck w/your bldg inspector 1st,,, good luck !
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Old 07-01-2010, 11:10 AM   #19
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Cutting concrete foundation for door, is it safe?


One more vote to go ahead IF the top of the current window opening won't be altered. Ask the guy who will be doing the concrete cutting for his pro-opinion as well.
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Old 07-01-2010, 08:56 PM   #20
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Cutting concrete foundation for door, is it safe?


First thank you all for your comments; so far it appears that there are no major issues to cut the concrete below the existing window as window’s header already supporting the load above it. I have no worries for drainage; the slope angle decrease dramatically few feet down from the window so I believe that will work out. The only thing that I am concern about is the shear force of tons of soil that pushes against the concrete wall and foundation, in other words would it be ok to interrupt the continuity of concrete wall which is constantly under pressure.
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Old 07-01-2010, 09:23 PM   #21
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Cutting concrete foundation for door, is it safe?


You dig out the dirt there isn't any pressure against that wall
You will need to build a proper retaining wall to hold back the dirt from the slope(s).
And if you will be stepping up to get out of the basement area you will need to make sure you have proper drainage

The drawing shows cutting out below 2 windows ?
How wide of an area are you cutting out ?
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Old 07-03-2010, 07:57 PM   #22
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Cutting concrete foundation for door, is it safe?


So I decided to go ahead and get some to do this project, but yesterday I noticed the gutter drainage is passed from this side, so here is my question; according to standards how deep in ground is this drainage pipe? I was told by a contractor that drainages are usually passed beside the footer, is this true and if it is true does it mean that I can dig 5 feet without interfering with the drainage system?? Attached is a drawing of how the situation looks like…
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Old 07-04-2010, 02:01 PM   #23
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Cutting concrete foundation for door, is it safe?


I would consult a Structural Engineer and/or a soil professional to be safe. They would check the soil, figure the pressure, calculate the required remaining wall after the proposed cutting to see if it is possible or give some professional suggestions for the safety and liability issues involved. Taking into account the concrete wall thickness, steel placement and size, footing width and depth, steel there, etc. A retaining wall as someone suggested would not work in this case as the side (proposed wall) is supporting the end (corner) of the back wall--- the shear pressures there could be tremendous. I wouldn't give you information just for the safety and liability involved, and I am not a S.E.

Please get a permit, to keep you and your family safe......

Be safe, Gary
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Old 07-05-2010, 02:33 AM   #24
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Cutting concrete foundation for door, is it safe?


Agreed !! Get an engineer. A retaining wall holding back 8 feet of dirt is nothing to guess at.

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