Extracted text: Reinforced Concrete Design Determine the required spacing of 2 legged 12mm diameter stirrups at a distance "d" and "2h" from the top of rafter CD. Use b=300mm, d=625mm, h=700mm, fc'=35MPA, Grade 420 rebars.column is 600mmx600mm. Use simplified calculation and National Structural Code of the Philippines (NSCP 2010) 85 N/m 75 k/m 1-70 85m ir 88M 8 8m