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Question
Hi Dan, I'm installing a Steel beam down stairs (basement) in my home that will be supported by 2 lolly columns(One at each end). The floor is a cement slab approximate 3" to 3 1/2" thick. Knowing that the lolly columns have to be set on top of a footer, my questions is can the footer be made on top of the cement slab or do I have to cut into the slab and dig down? Thanks Dan for the help.
Todd, you already know the correct answer. The proper thing to do is to cut and remove a section of slab to dig and pour the footing below the floor line. Then set the column and pour the floor back.
Let's assume for a moment that there is no void under the slab, it is a really well made, and you want to go for it. I would cut the slab completely through where the footing should be so that if there is enough pressure to break the slab, it does not crack or extend into the rest of the floor. Form on top of the slab, pour, then set the column. You now have a raised lump on the floor under the column which may or may not affect use of the basement.
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| Rating(1-10) | Knowledgeability = 9 | Clarity of Response = 10 | Politeness = 10 |
| Comment | Thanks Dan-I figued so, but had to make sure. People tell you all kinds of stuff that they think is right. | ||
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Answers by Expert:
Dan Griffin
Expertise
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.
Experience
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.
Organizations
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.
Education/Credentials
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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