New Year Wishes - 2017

Dear Readers,

A new year is like a blank book, and the pen is in your hands. It is your chance to write a beautiful story for yourself. Happy New Year .

Regards,
Crane & Crane Man (Engineer Diary)

Unit Weight of Chinese Channel

Dear Readers,

Generally Chinese Steel Grades Q195, Q215, Q235, Q255 and Q275 are used for Structural works. steel grades by the yield point of the letter on behalf of (Q) and yield point value is mentioned and sub grade A, B, C & D are used for further classification. For Example Q235A means, it is a carbon steel and yield strength is 235 Mpa

For Steel section Channel is mentioned as "C"; Angles are mentioned as "L" and Beams are mentioned as “I “or “H " followed by number. To find out the size of section is number multiple by 10 is the size of member.

For Example C16 means Channel 160 mm depth. Similarly H10 means H section 100 mm depth.

If the same size but width or Flange size is different then suffix a, b, c is shown. For example C20a & C20b, Both are 200 Channel however flange is 73 and 75 mm respectively. C20a means Channel 200 X 73 and C20b means Channel 200 X 75.

Unit Weight of Chinese standard Channel is as below.

For More Details about Chinese Standard Steel Click Here
For More details about Unit Weight of Other Channel section Click Here

Grades of Rust for Steel Structure

Dear Readers,

 

Rust is having important role to finalaise the surface preparation for steel structure before painting. Four Rust grades, designated A, B, C and D respectively, are specified. The rust grades  are defined as follows

 

Grade-A : It is mainly adhering mill scale, but little rust

Grade-B : It is rusting and flaking of mill scale has begun

Grade-C : The mill scale is rushing away, with slight pitting

Grade-D : The mill scale has rusted away, with general pitting

 

Rust Grade photographs are as follows

GRADE-A

 

Steel Surface largely covered with adhering mill scale but little, if any, rust.

 

 

  

 

 

 

 

 

GRADE-B

 

Steel Surface which has begun to rust and form which the mill scale has begun to flake. 

 

 

 

 

 

GRADE-C

 

Steel Surface on which the mill scale has rusted away or from which it can be scraped, but with slight pitting visible under normal vision.

 

 

 

GRADE-D

Steel Surface on which the mill scale has rusted away and on which general pitting is visible under normal vision.

 

 

 

For More Details about Surface Preparation of Structural Steel Click Here