Yield strength for ASTM A375 light Gage Material

[CALfan]

My office is retrofitting an existing structure that was framed using light gage, ASTM A375 steel material. I understand that in the early 70's A375 steel was replaced with A606 material. However, can someone please tell me what was/is the yield strength for the existing A375 material?

Thanks in advance for your help.

 

[boo1]

One ASTM A375 structural reference lists, "50,000 psi minimum yield for high tensile strength purlin or girt sections with material thickness equal to or less than 0.23 inch."

 

[CALfan]

Thanks Boo1.

I appreciate your quick response.