How do you calculate the load bearing capacity of a reinforced concrete slab?

How do you calculate the load bearing capacity of a reinforced concrete slab?

Solution:

1. Loads on the RCC Slab. Self-weight= concrete unit weight * Volume of concrete. = 24 * 0.1= 2.4 KN/m2
2. Loads on the Beam. Self-weight= concrete unit weight* beam width*beam height. =24 * 0.28*0.25= 1.68 KN/m.
3. Compute Applied Moment. Assume partial fixity of columns.
4. Geometry of the Original Section.

How do you find the maximum weight of a concrete slab withstand?

Determine the Pad’s Thickness If the concrete pad is two-inches thick and the concrete manufacturer’s stated compression strength is based on that thickness, then you can simply multiply the area by the stated psi to determine how much weight the pad can bear.

What is the bearing capacity of concrete?

Imposed loads varies from approximately 1.5 kN/m2 (153 kg/m2) in domestic buildings to approximately 10 kN/m2 (1053 kg/m2) in heavy industrial areas. 500 kg/m2 is typical for office, storage space and similar.

What is the minimum required soil bearing capacity for concrete footings?

Under code, generally, one-story buildings with footings on undisturbed soil with LBVs between 1,500 and 4,000 should have a minimum width of 12 inches. Two-story buildings require a minimum of 15-inch wide footings for 1,500 LBV soil.

How do you determine load bearing capacity?

Step 1 – Find out the no. Of bars and their dimensions in one meter span of slab in shorter direction. Step 2 – Find out the grade of concrete. Step 3 – Using the IS 456 page 90 formula, calculate the area of steel present in tension and the thickness of slab and thereafter find the moment of resistance of slab.

How is bearing capacity calculated?

Bearing capacity is one method of measuring this strength. Researchers can calculate the bearing capacity of soil by determining the limit of contact pressure between the soil and the material placed on it. This accounts for cracking, seepage and the shear strength of the soil itself.

How do you determine the load bearing capacity of a floor?

Multiply the maximum load per square metre by the total area of the floor. If the example floor is 6 by 9 metres (20 by 30 feet), the total area is 54 square metres (600 square feet); 54 x 269 = 14,526 kg (32,024 lb). This number tells you the total load capacity of your floor.

How do you determine the strength of a concrete slab?

Method: To complete a penetration resistance test, a device drives a small pin or probe into the surface of the concrete. The force used to penetrate the surface, and the depth of the hole, is correlated to the strength of the in-place concrete. Pros: Relatively easy to use and can be done directly onsite.

How do you calculate soil bearing capacity?

Bearing capacity is one method of measuring this strength. Researchers can calculate the bearing capacity of soil by determining the limit of contact pressure between the soil and the material placed on it.

How do you calculate bearing capacity of soil?

Safe Bearing Capacity of Soil Testing Procedure:-

1. Firstly Excavate a pit of required depth. ( preferably equal to the depth of foundation)
2. Take a square cube of known weight and dimensions.
3. Now drop the square-cube on the pit with a known height.
4. Measure the impression made on the pit by square cube using the scale.

What is the bearing capacity of soil?

In a nutshell, bearing capacity is the capacity of soil to support the loads that are applied to the ground above. It depends primarily on the type of soil, its shear strength and its density. It also depends on the depth of embedment of the load – the deeper it is founded, the greater the bearing capacity.

How do I calculate how much concrete I need for a slab?

Load Calculation on Column:

1. Volume of Concrete = 0.23 x 0.60 x 3 =0.414m³
2. Weight of Concrete = 0.414 x 2400 = 993.6 kg.
3. Weight of Steel (1\%) in Concrete = 0.414x 0.01 x 8000 = 33 kg.
4. Total Weight of Column = 994 + 33 = 1026 kg = 10KN.

How do you determine the bearing capacity of a foundation?

Determining Bearing Capacity on Site Check soil density in a footing trench using a penetrometer. The bearing capacity of your soil will help you determine if you need a shallow foundation or deep foundation. Soil strength directly under the footing, where loads are concentrated, is crucial to foundation performance.

How to find the safe bearing capacity of a soil?

Dividing the ultimate bearing capacity of a soil by a factor of safety, the safe bearing capacity of a soil is obtained.Max. safe bearing capacity of different types of soils are given below

How to increase the bearing capacity of a footing trench?

Soil types and bearing. Mechanically compacting the soil can also raise its bearing capacity. The author checks soil density in a footing trench using a penetrometer. Soil strength directly under the footing, where loads are concentrated, is crucial to foundation performance.

What happens when the bearing power of soil exceeds the load?

9. The settlement of the ground will be fairly is proportion to the load upto a certain limit, when the bearing power of soil exceeded, the settlement will be out of the proportion. 10. The bearing capacity and safe bearing capacity of soil are calculated by using the following