Building Homes or Extensions/Weight of concrete slab

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Expert: - 10/29/2008


Question
I have a 8x8 slab 4 inch thick, that i need to move about 40 ft in the backyard. Would you know what the weight would be and how would i be able to complete the project?

Answer
Dry concrete will weigh about 155# per cubic foot.

8 x 8=64 square feet
64 x.3333=21.33 cubic feet
21.33 x 155 lbs.= 3,306 pounds give or take

Several possibilities:

Push it with a Bobcat or similar

Gather a collection of large round poles, pry up the slab with appropriate lever and fulcrum, slide poles under the slab.  Pull with a truck, or push with a spud bar.

Contact a local wrecker company or crane service to see if they would be able to winch it into location.

Be aware:  concrete is seldom flat on the bottom.  Unless you can set it down with a bucket or crane, you will tear up whatever subgrade you establish.  If the concrete is not reinforced, it can break in the attempt.  If you intend for it to be level, you will need to be able to raise and lower the slab to adjust grade.

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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.

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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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