Cracked Concrete Definition
Cracked Concrete Definition
(OP)
Does anyone know what defines cracked concrete? How wide and deep can the crack be? I want to specify a mechanical anchor at a joint or crack in the concrete but I'm not sure how wide of a crack is too wide for it to qualify. Any suggestions? Thanks.






RE: Cracked Concrete Definition
RE: Cracked Concrete Definition
RE: Cracked Concrete Definition
For one-way members, ACI-318 Eqn 9-9:
Mcr = fr * Ig / yt
Mcr: cracking moment
fr: modulus of rupture = 7.5 * sqrt(f'c)
Ig: mom. of inertia of concrete section
yt: distance from the centroid to the extreme fiber
ACI 318 Appendix D requires anchors approved for cracked concrete in all seismic applications. These anchors must be approved for the specific seismic category.
RE: Cracked Concrete Definition
Top of a beam - uncracked
Bottom of beam - cracked
Even for PT (and precast) I'd still assume a cracked bottom surface since ultimate loading often sends PT concrete into tension.
RE: Cracked Concrete Definition
RE: Cracked Concrete Definition
RE: Cracked Concrete Definition
RE: Cracked Concrete Definition
RE: Cracked Concrete Definition