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Building Homes or Extensions/Dog Door Installation Through Integra Block Wall

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Expert: - 12/2/2008


Question
I have a blandford home built with integra block post tension walls. This past weekend I installed a dog door, which required me to cut out a 15"x20" opening about a foot off the ground. It's located in a space between my sliding door and a bay window. I understand that this is a load bearing wall that distributes the weight of the roof with either a steel plate or plank of wood on the top row of the integra block. Would the size opening that I cut out have any effect on the load bearing capabilities of the wall? I just want to make sure that there is no other steps that I should take to support the opening.

Answer
Carl, if you didn't encounter any of the reinforce rods and, especially, if you did not cut any of them, I think you're fine.  That size opening would not typically compromise any CMU type wall.  Hope this lets you sleep better.  How does the dog like it?

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Dan Griffin

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I can answer almost all questions related to the total construction process. My expertise is in commercial construction, though I can field most any residential question. I have hands on experience in concrete, heavy equipment, masonry, all phases of carpentry, interior finishes, and I am fairly strong in mechanical and electrical.

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I have over 20 years experience as a commercial carpenter and commercial construction superintendent. I have another 20 years experience in facility management for a major school district.

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My favorite hobby for he past 12 years has been singing bass in a The OkChorale men's barbershop chorus and the Mature Moments quartet.

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I hold a Bachelor's degree in English and Math. I have completed many continuing education hours in the building trades. I hold a Master Carpenter card from the AGC, Associated General Contractors.

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