Posts

Showing posts with the label Structure Design

What are the development lengths of bars for different grade of reinforcement and concrete?

Here are the development lengths of different grade reinforcement bars for different concrete grades. Development lengths are in mm. 1. Development lengths for plain bars of grade Fe250. 2. Development lengths for HYSD bars of grade Fe415. 3. Development lengths for HYSD bars of grade Fe500. Hope you find it useful. Comment if you have doubts or suggestions. Like, tweet and + post if you find it useful. follow us to get more. Build Your Own Website 4000+ templates, customize and go live!

What are the permissible horizontal deflection in building?

# For wind case : permissible max. Horizontal deflection is H/500. # For EQ case : permissible max. Horizontal deflection is H/250. # For EQ case you have to satisfy story drift criteria of 0.004H also. All deflection worked out shall be for service loads only i.e. for unfactored combinations.

How to find the mass of reinforcing bar quickly?

Simple way to find the weight of reinforcing bar: The density of steel is 7850 kg/m³. Now let say you want weight per m. then what will be the formulation? Check this out. 7850(kg/m³) x [pi()/4 x d² ](m²)= mass of the bar per m.        (eq. 1) Now resolving this we get 7850 x pi()/4 = 6165.375 right?   Putting this into eq. 1                          6165.375 (kg/m³) x d² (m²) = mass per m.                                          (eq. 2)   What can be bar diameter? Let say 10mm, 12mm. . . we are used to mm format bar diameters, right? So, let us make formulation to eq. 2 for inputting bar dia as mm.              1m = 1000mm. => 6165.375 x 10^-6 =   1/162.196 Hence, mass per m of bar = d² (mm²)/162.196. Now if you want to get mass per feet, then use this relation 1m = 3.281 feet  Therefore mass of bar per feet = d² (mm²)/(162.196 x 3.281) = d² (mm²)/532.139. So now onwards, please don’t bother to use d²/162.2 for finding mass of reinforcement. Enjoy

Which are the IS codes for foundation?

1)       IS 1904 - Code of practice for design and construction of foundations in soils : general requirements. 2)       IS 1080 - Code of practice for design and construction of shallow foundations in soils (other than raft, ring and shell ) 3)       IS 2950 - Code of practice for design and construction of raft foundations. 4)       IS 111089 - Code of practice for design and construction of ring foundation. 5)       IS 2911 - Code of practice for design and construction pile foundations. 6)       Code of practice for design and construction machine foundations.   Hope you find it useful. Comment if you have doubts or suggestions. Like, tweet and + post if you find it useful. follow us to get more.

What are the Properties of structural steel (Reinforcement)?

Basic Properties of steel Unit mass of steel = 7850 kg/m3 Modulus of elasticity = 2.0 x 10^5 N/mm2 Poisson ratio = 0.3 Modulusof rigidity G = 0.769 x 10^5 N/mm2 Co-efficient of thermal expansion = 12 x 10^-5 /degree celcius