Sunday, January 20, 2008

Rebar Weight

 
Dear List Members,
 
I have the question about the weight of Reinforcing Steel Bar.
 
According to ASTM A615, The weight of the rebars shall be at least 94% of the applicable weight per unit length prescribed in Table 1.
 
It is the  6% margine that I am curious. What caused this 6% weight margine?
 
If anyone knows this reason, Please let me know!!
 
Thanks in advance.
 
Kang, Sung-hoon