Properties of ISJC

Dear Readers,

This is continuation with my earlier post unit weight of ISJC, self would like to post the sectional properties of ISJC.

Properties of beams are having two parts. One part is Physical dimensions and another part is sectional properties of Beam. Basically dimensional part contains depth and width of section, Thickness of Web and Flange and Root Radius. Where as sectional properties contains Moment of Inertia, Radius of Gyration and Section Modulus. These are useful for design engineers.

Click on Picture to enlarge

For More Details about Sectional Properties Click Sectional
For More Details about  Steel Sections Click Steel
For More Details about Classification of Hot Rolled Steel Click IS 808

Best Quote: "If You manage to smile at any situation, you are the winner of highest number of hearts in this world". Have a Nice Day

Wind Force-Beaufort Scale

Dear Readers,

This is continuation with my earlier post of Wind speed and Wind Direction. Below is a wind chart, created by Admiral Beaufort. Beaufort arranged the numbers 0 to 12 to indicate the strength of the wind from calm (force 0) to hurricane (force 12).

Click on Picture to enlarge 

The Beaufort scale, which is used in Met Office marine forecasts, is an empirical measure for describing wind intensity based on observed sea conditions.

For More Details about Wind Speed Click Wind

For More Details about Wind Direction Click Direction

Best Quote: "Keep your eyes on the stars, and your feet on the ground". Have a Nice Day

Deposition of Welding Electrode

Dear Readers,

During Fabrication and Erection works we used welding electrodes for welding process. This article let us discuss about the weld metal deposition calculation.

Welding Electrodes available in markets are 2.5 mm, 3.15 mm, 4 mm & 5 mm with a length of 350 mm or 450 mm. The size mentioned 2.5 / 3.15 / 4 & 5 mm are only core material i.e excluding coating material. The length mentioned is full length including stub.

For calculation of welding deposition per rod we should know the effective length of Electrode usage. Note that Electrode 100% can not be consumed due to space between welding holder with work piece. Generally 75-100 mm of electrode will not be used depends upon the nature of work. Unused welding electrode including stub length. Industrial practice we used to call it is cut bits. It is shown in below picture.

For calculation purpose of welding deposition per rod we should know the effective length of welding electrode usage.

Effective Length = Length of Electrode - (Stub length + Unused electrode)

Following table shows the welding electrode deposition per rod in grams and number of rod required per kg weld deposition

Above table is calculated based on formula of cylindrical (Volume of Cylinder = Pi X r X r X h) and cut bit is 75 mm. Where "r" is radius of electrode and "h" is length of rod considered as a height

Percentage of efficiency will vary based on type of electrode. For CS Electrode is 100%, If it is Low Hydrogen AS electrode is 108% and If it is  Low Hydrogen CS electrode is 115%. This is due to flux coating material.