There is a new building being created just beside our house and I love to watch the construction work everyday. Yesterday I saw them calculating a number of things but could not understand what. When I asked my father what it could be, he said that maybe they were calculating the sloper, how much more materials needed or deriving the answer using a design
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load formula. I knew about the other things a bit but this design load was new so I tried to know more. Here is what I have known as of now.
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What is design load?
In respect of architecture and engineering, the design load refers to the maximum amount of stress that can be put on a structure. If the stress becomes excess, there is a risk of collapse of the entire.
How to calculate design load?
The formula for load calculation for
Column=Self weight* number of floors
Beams=self weight per running meter
Wall load per running meter
Total load on slab (dead load + live Load + Wind load + self load)
Load on Column calculationSelf weight of concrete is about 2400kg/m^3 which is about 24.54kn/m^3
Self weight of steel is about 7850kg/m^3
If the column size is 300mm * 600mm with 1% steel and 2.55 high, the self weight of the column is about 1000 kg per floor or 10kN.
Load on Beam calculationIf a beam is 300mm*600mm excluding slab thickness then
300mm*600 excluding slab
Volume of concrete = 0.30* 0.60*1 =0.18^3
Weight of concrete = 0.18* 2400= 432kg
Weight of steel (2%) in concrete = 0.18*2*7850=28.26
Total weight of beam = 432 + 28.26= 460.26kg/m = 4.51KN/m
Load on wall calculationDensity of bricks = 1800 to 2000 kg/m^3
For 9 inch thick brick or 230mm brick wall od 2.55meter height and a length of 1 meter, the calculation is as follows
The load= 0.230*1*2.55*2000=1173kg/meter or 11.50kN/meter
Load on slab calculationIf the slab is 15mm thick, self weight=
0.150*1*2400 = 360kg or 3.53kN
Let the food finishing load be 1kN per meter superimposed live load to bw 2kN meter and lastly the wind load is 875 near about 2kN meter
The slab load hence is about 8 to 9kN per sq mt.
The
design load formula is indeed confusing so let experts handle it if you are not pro at it.
Read More:
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What is load bearing structure?
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What Is Design Load?
Samarpita
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2022-08-09T10:25:03+00:00 2022-08-09T10:25:04+00:00Comment
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