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How to Calculate Static Load Limits on Concrete Floors

Concrete mix and water are combined to form concrete. Concrete is found on all sidewalks and is used to construct many buildings. There are a few different types of concrete, including high strength, quick setting and regular concrete mix.

Concrete can crack if there is too much weight on it.

Concrete mix and water are combined to form concrete. Concrete is found on all sidewalks and is used to construct many buildings. There are a few different types of concrete, including high strength, quick setting and regular concrete mix. While most people may think there is no weight limit you can put on concrete, that is not true. If you plan to build a structure or build on concrete, it is necessary to calculate the static load limit on the concrete floor before installation because the weight on concrete should not exceed 3,000 pounds per square inch.

  1. Inspect the concrete where you will be putting the weight on and check that it has properly dried. Touch it with your hand to determine if it has dried up enough. Inspect for cracks and check that there are none that may affect the weight of the structure on the concrete.

  2. Run a tape measure along the length and width of the concrete slab that has already been poured. Record both measurements. Multiply the two together to get the total square footage of the area.

  3. Divide the maximum amount of stress the concrete can have by the total square footage in feet. If the length was 40 inches and the width was 10 inches, then the total square footage would be 400 inches.

  4. Take 3,000/40 to get 75 pounds per square inch. The load capacity of 75 pounds per square inch is enough to hold the structure because it is not equal to 3,000 pounds per square inch.

About the Author

Alexander Callos began writing in 2005 for "The Lantern" at The Ohio State University and has written for various websites, including Bleacher Report, Top Ten Real Estate Deals and Columbus Sports. He has published articles for CBS Sports, SI.com and other websites. He graduated in 2007 from The Ohio State University with a bachelor's degree in public affairs journalism.