Search the Community
Showing results for tags 'minimum steel ratio'.
Found 1 result
Engr Waqas posted a topic in Concrete DesignAssalam o alaikum dear fellows, Why we need more temperature steel ratio for lesser grade of steel as shown by following relation? For Fy = 40 ksi As(min) = 0.002bh For Fy = 60 ksi As(min) = 0.0018bh Moreover, According to 220.127.116.11, it says 18.104.22.168 — Where shrinkage and temperature movements are significantly restrained, the requirements of 8.2.4 and 9.2.3 shall be considered. And in its commentary it says R22.214.171.124 — The area of shrinkage and temperature reinforcement required by 126.96.36.199 has been satisfactory where shrinkage and temperature movements are permitted to occur. Where structural walls or columns provide significant restraint to shrinkage and temperature movements, the restrain of volume changes causes tension in slabs, as well as displacements, shear forces, and flexural moments in columns or walls. In these cases, it may be necessary to increase the amount of slab reinforcement required by 188.8.131.52 due to the shrinkage and thermal effects in both principal directions (see References 7.7 and 7.16). Kindly tell how to increase this amount? Thanx.