Loads on Building for Modeling | Structure Load Calculation | Analyze Building | Excel Spreadsheet
Calculation of loads for Column and Foundation Design Structural Design August 1, by Designer How to calculate the total loads on a column and corresponding footing? This article has been written on the request from my readers. Engineering students generally get confused when it comes to calculating loads for column and footings design.
The manual process is simple. These tools are leagues ahead of manual methodology for structural design, and highly recommended. In professional practice, there are some basic assumptions we use for structural loading calculations. You can hire me for your structural design need. Contact me.
For Columns Self weight of Concrete is around kg per cubic meter, which is equivalent to kN. Self weight of Steel is around kg per cubic meter. So, in my calculations, I assume self weight of column to be between 10 to 15 kN per floor.
For Beams Similar calculations as above. I assume each meter of beam has dimensions of mm x mm excluding slab thickness. So, the self weight can be around 2. For Walls Density of bricks varies between to kg per cubic meter. You can calculate load per running meter for any brick type using this technique. For autoclaved, aerated concrete blocks like Aerocon or Siporex, the weight per cubic meter is between to kg per cubic meter.
For Slab Assume the slab has a thickness of mm. Now each square meter of slab would have a self weight of 0. Now, assume Finishing load to be 1 kN per meter and superimposed live load to be 2 kN per meter.
So, we can calculate slab load to be around 6 to 7 kN per square meter. Factor of Safety In the end, after calculating the entire load on a column, please do not forget to add in the factor of safety. For IS , the factor of safety is 1. You can use RCC Column Design app to calculate steel required for the calculated axial load using this method.
These are also called as imposed loads and are changeable and dynamic. These include loads such as vehicle traffic, the occupants of the building including weights of movable partitions or furniture etc. The intensity of these loads may vary depending on the time of the day.
Example 1 : an office building may experience increased live loads during the week-day or work hours but much smaller loads during night or at weekends. Example 2 :In gym building, usually there are increased live loads at morning and evening time, but smaller loads in the afternoon time as people will be at work. These loads keep on changing from time to time. These loads are assumed accordingly by the one who designs the building.
Some of many important values which are usually used are given below. These values are the minimum values and can be increased wherever necessary. Minimum values for the live load The code provides uniformly distributed load as well as the concentrated loads.
The floor slabs have to be designed to carry either of those loads depending on whichever produces the greater stresses in the part under consideration. Snow loads on building: Snow loads are the one which are imposed on the structure due to the accumulation of snow and is more of a concern in geographic regions where snowfalls can be heavy and frequent. Accumulation of adequate quantities of snow can add a sizable load to the structure.
As the snow accumulates on the roof first, the shape of the roof is an utmost important factor to be considered in the magnitude of the snow load. If the roof is of flat type, the snow is likely to accumulate more, whereas the snow will fall of a steeper roof pitch.
This issue is similar in areas of heavy rainfall where ponding may occur. Snow load on the building Wind Loads on building: Wind loads are the primarily horizontal loads which are caused by the movement of air relative to earth. This load is considered for the building whose height is twice its width, to exposed wind surface.
Wind load may not be significant concern for small ,massive low level building, but it attains importance with the height, the use of lighter materials, and also the shapes which may affect the flow of air. When the dead load of a structure is not capable to resist the wind load, then some additional structure and fixings may be needed. In some very complex structures, it might be necessary to undertake the wind tunnel test of the building to access the change in air flows caused by the building.
Wind load on the building Wind load calculation as per IS Part-3 : For low rise building up to stories, the wind load is not critical as the moment of resistance provided by the continuity of the floor system to column connection and walls provided between columns are enough to resist the effect of these forces.
The horizontal forces exerted by the components of the wind also affect the building and is to be kept in mind while designing the building. Calculation of the wind load mainly depends on two factors: Velocity of wind Size of the building The basic wind pressure, Vb is obtained from the code and it depends on the locality of the building. Settlement loads on building: This load is caused by an uneven settlement of foundation of the building which produces an equivalent effect as the high loads.
The poor soil condition might decrease the support of the foundation. No additional load is applied to the building but due to the uneven settlement, the supported portion of the building carries more load.
Settlement load on the building Construction loads on building: Construction load: scaffolding These are the loads which are imposed on a temporary or partially completed structure during and as a result of the construction process. These loads include material, personnel, equipment imposed on the temporary or permanent structure during the construction process but are not limited only to these. Construction load: shoring Temperature loads: These loads are also called as thermal loads.
When temperature changes for a material, it either expands or contracts. This effect can exert significant loads on the structure. Expansion joint s have to be provided at points on long sections of structures such as walls and floors. This facilitates the elements of the structure to be physically separated and can expand without causing structural damage. Also the expansion joints are provided on roads to ensure the safe and smooth running of the vehicles.
This load depends on the material used for the structure. Cofferdam acting as construction load.
Earthquake Load Significant imposed loads can occur on the structure of a building during an earthquake. The design of buildings in areas of seismic activity needs to be carefully analyzed and the structure of the building needs to be designed in such a way that it does not fail in the event of an earthquake.
Calculation of loads for Column and Foundation Design | Structural Design
Thermal Loads The material of the building structure has the property of expanding with the change of temperature. This causes a significant load on the structure. Expansion joints are provided on the long span of structures such as walls and floors. So that the elements of the structure can function physically differently and expand without damaging the structure.
Dead Load Calculator
They can also be Tension or compression. Live loads are usually migration loads. These may include properties such as impact, motion, vibration, etc. In the example of a live load bridge, live activity changes due to a change in vehicle behavior or external forces.
Live load is the load generated by the dynamic forces for business and desired use. Like this post? Share it with your friends! Suggested Read —. You can hire me for your structural design need.
Contact me. For Columns Self weight of Concrete is around kg per cubic meter, which is equivalent to kN. Self weight of Steel is around kg per cubic meter.
Load Calculation on Column – Load Calculation of Column, Beam, Wall & Slab
So, in my calculations, I assume self weight of column to be between 10 to 15 kN per floor. For Beams Similar calculations as above. I assume each meter of beam has dimensions of mm x mm excluding slab thickness. So, the self weight can be around 2. For Walls Density of bricks varies between to kg per cubic meter. You can calculate load per running meter for any brick type using this technique. For autoclaved, aerated concrete blocks like Aerocon or Siporex, the weight per cubic meter is between to kg per cubic meter.
For Slab Assume the slab has a thickness of mm.