slabs

[ticas]

when designing slabs, do you like to use grade 60 or grade 40 steel and why?

 

[JAE]

Grade 60
In my area it is the common type of rebar available.

I'm not sure if grade 40 is still around - perhaps so but we don't specify it.

 

[hokie66]

Reinforcing steel in Australia is typically 500 MPa (about 70 ksi), except for the swimming pool industry, which prefers 250 MPa.

 

[BAretired]

When Grade 40 is specified here, Grade 60 is supplied, so there is no point in specifying Grade 40.

BA

 

[ukengineer58]

Hokie why does swimming industry use 250?

 

[hokie66]

Swimming pool builders use 12 mm, Grade 250 bars, because they are easier to bend on site. This is for free form pools where they bend all the bars on site to suit the curves.

 

[rowingengineer]

Following on from Hokies comments the Grade 250 bar is still deformed not smooth.

http://www.nceng.com.au/

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."

 

[dik]

and the grade 250 bars would require a greater number for the same moment resistance... and minimise crack widths in the process.

Dik