Unfortunately, over the past decade, a few paragraphs of text and an allowable stress design table have turned into the 48 pages of provisions and commentary that now reside in Appendix D of ACI 318-11.įortunately, there are several software applications that can assist with the heavy lifting of anchor design. One of the advantages of the CCD method was that it used a simpler rectangular area, rather than overlapping circular cone areas. The scope of the provisions expanded when they appeared in Appendix D of ACI 318-02, which standardized the analysis methodology for post-installed anchors. The new provisions also clearly identified specific limit states, which may not have been apparent in older design tables. The CCD method provided better predictions of concrete breakout strengths than the previously common 45-degree cone method. It was initially a strength design option and was limited to cast-in-place anchors only. Concrete Capacity Design (CCD) has been a code methodology for anchor design since it was introduced directly into section 1913 of the 2000 International Building Code (IBC).
