Engrman
Structural
- Apr 2, 2002
- 54
A client wants to add canopies to his building. The canopies would be attaching to steel lintels supporting multi-wythe brick walls. The lintels consist of two 12"x20.5 'C' shapes with 3/8'' plates top & bot. According to historical records construction was completed in 1898. The earliest ASTM spec I can find is ASTM A9, dated 1900. It lists Fy=35 ksi and Fu=60 ksi for 'Medium' Steel. Should I spec 60xx welds?