Title: Concrete Q & A: Concrete Strength Requirements at the Intersection of Slabs and Shearwalls

Author(s): James R. Cagley, W. Gene Corley, S.K. Ghosh, Jacob S. Grossman, Ronald Klemencic, Cary Kopczynski, Basile G. Rabbat, and Robert Sinn

Publication: Concrete International

Volume: 29

Issue: 11

Appears on pages(s): 75-76

Keywords:

DOI:

Date: 11/1/2007

Abstract:
I’m reviewing the contract documents for a 40-story building. The documents call for a concrete compressive strength of 4000 psi (28 MPa) in the floor slabs, 8000 psi (55 MPa) in the columns, and 6000 psi (41 MPa) in the walls. I’m aware that ACI 318-051 contains special requirements for the placement of concrete at the intersection of the columns and the floor, but do these requirements also apply to the intersection of the walls and the floor?