- Height of parapet wall should be =
**1 m.** - Thickness of DPC is =
**2.5 cm.** - Height of building =
**3.15m.** - Height of window =
**2.1 m.** - One bag of cement =
**1.25****ft**^{3} - Weight of one cement bag is =
**50****kg.** - Minimum thickness of slab =
**125****mm(5")** - No. of cement bags/m
^{3}=**28.8****bags** - Lintel thickness =
**15****mm** - Lintel is provided @
**2.4 m**in case of brick wall. - Minimum diameter of bars used in slab =
**8****mm.** - Minimum diameter of bars used in column =
**12mm.** - Minimum diameter of bars used in dowels =
**12mm** - Maximum diameter of bars in slab =
**( 1/8) x thick of slab** - Maximum chair spacing = 1
**meter** - Dimensional tolerance of cube =
__+__2**mm** - Maximum water absorption of first class brick =
**15 % of its dry weight** - Initial setting time of cement = 30
**min** - Final setting time of cement = 10
**hours** - DPR = Detailed Project Report
- Unit weight:
- RCC =
**25 kn/m**^{3}= 25000 N/m^{3} - PCC =
**24 kn/m**^{3}= 24000 N/m^{3} - Steel =
**7850 kg/m**^{3} - Brick =
**1600 kg/m**^{3}= 16 kn/m^{3} - Soil =
**1800 kg/m**^{3}= 18 kn/m^{3} - 1 Gallon =
**3.78 liters** - Minimum no. of bars
- For square columns =
**4 bars** - For circular columns =
**6 bars** - Standard sand in India is obtained from Ennore Tamil Nandu.
- 1 Yard =
**3 feet** - Weight of steel =
**D**^{2}/162.2 kg/m or D^{2}/533 kg/ft - Size of concrete testing cube =
**150 mm x 150 mm x 150mm** - Concrete cube is filled in
**3 layers.** - Slump cone is filled in
**4 layers.** - Cement should be used with in the
**3 months of manufacturing.** - Minimum thickness of shear wall =
**150 mm.** - Maximum thickness of shear wall =
**400 mm.** - (UTM) Universal testing machine is used for
**compression test of concrete & tensile test of steel reinforcement.** - Minimum curing period:
- 7 days - Normal weather condition
- 10 days - Dry and hot weather condition
- Minimum percentage of steel in column =
**0.8 % of gross area** - Maximum percentage of steel in column =
**6 % of gross area** - Nominal cover
- Footing =
**50mm** - column =
**40 mm** - slab =
**20mm** - beam =
**25 mm** - Least count:
- Compass =
**30' (30minutes)** - Dump Level =5 mm
- Auto level = 5mm
- Theodolite = 20" (20 seconds)
- Air voids left in concrete is called as Honey Combing.
- The transverse reinforcement of column are called ties.
- The transverse reinforcement in beam are called stirrups.
- Minimum hook length =9D, example 9x 10 mm = 90mm
- No. of bricks in m3 = 500 bricks
- No. of bricks in 230 mm brick wall in 1 cubic meter = 496 bricks (including wastage)
- No. of bricks in 115 mm thick wall for 1 square meter = 56 bricks
- 8- 12 kg of binding wire is used per metric tonne of steel.
- Cement ingredients are burnt @ 1400degree c temp.
- 1BHK stands for 1 Bedroom , 1Hall, 1 kitchen.
- Short columns fail in crushing
- Long column fail in buckling
- Intermediate column can fail both in crushing and buckling.
- Tensile strength of concrete = 0.7(sqrt(fck)), fck = 20 N/mm
^{2} - Modulus of elasticity of concrete =EC = 5000 sqrt(fck), fck =10,20,25,30 N/mm
^{2} - Characteristic compression strength of concrete :
- 150mm size cube tested @ 28 days (fck)
- Strength of concrete below which not more than 5 % of test results are expected to fail.
- Ordinary concrete M10 = M20
- Standard concrete M25 = M55
- High strength concrete M60 = M80
- In mixer machine concrete should be mix for 2-3 minute
- Storage of cement:
- Cement should be stored in dry places.
- 200 mm away from floor (in a platform)
- 300 mm away from walls.
- Not more than 10 bags stocked.
- Away from the moisture of chemicals.
- Water absorption for bricks 1st class should be less than 20 percent.
- Water absorption is less than 5 percent for the building stones.
- Factor of safety for steel = 1.15
- Factor of safety for concrete = 1.5
- Young modulus of steel, ES = 2x 10
^{5}N/mm^{2} - Types of steel
- Mild steel Fe250 N/mm
^{2} - HYSD (High steel strength deformed bars)
- Fe 415 N/mm
^{2} - Fy 500 N/mm
^{2}

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## Wednesday, June 02, 2021

### Important points for civil engineers

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There are many different types of ICF walls. Is one worth the money? No or yes? If you want to build a home that is both environmentally friendly and high-performance, you'll need to go a little further than that. Energy efficiency is better when ICF construction is used. You can't let air in through the walls because it is very well sealed. For another thing, there aren't any thermal bridges between the two continuous insulating layers on each side because they're all one. Heat is lost less because of this. If you want to build your house with ICF, now is the time to go to WestPeak ICF.

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