Product Technical Guides : US-EN Cast-In Anchor Channel Fastening Technical Guide | Page 276

1. Anchor Channel Systems 2. HAC Portfolio 3. HAC Applications 4. Design Introduction 5. Base material 6. Loading 90 Degree Corner Tension breakout cone formation is precluded because of having rebars instead of headed studs. Therefore to determine the available concrete for the analysis depends on formation of projected areas due to the concrete breakout cone in shear. Please refer to the Figure 9.3.2.1. Figure 9.3.2.1 — HAC CRFOS U — Single anchor channel — 90 degree Corner. 9. Special Anchor Channel Design 10. Design Software 11. Best Practices 12. Instructions for Use 13. Field Fixes 14. Design Example Obtuse Angle Corner Shear: Obtuse angle corners have a greater amount of concrete than in 90 degree corners. The determination of c a2 dimension for perpendicular shear analysis is conservatively assumed as shown in Figure 9.3.2.4. Please refer to Figure 9.3.2.4 covering the perpendicular shear analysis at obtuse degree corner. Please refer section 9.2.2 for analysis of anchor channel subjected to longitudinal shear for obtuse angle corner with single anchor channel on face of slab. Tension: For Tension analysis refer section 9.3.1 pull out in tension. There will not be the concrete breakout cone development in tension. The cb concrete cover is taken as minimum of the four s/2, c b1 , c b2 and c b3 dimensions.(s=spacing between rebars). Refer Figure 9.3.2.4 and Figure 9.3.2.5. The effect of the reduced side edge distance can also effect the pullout strength of rebar if the cover is so small that it yields the c b /d b value less than 2.5. The value of c b is equal to c a2 . 8. Reinforcing Bar Anchorage 9.3.2 — H  AC CRFOS U DESIGN: FACE OF SLAB OUTSIDE CORNER WITH A SINGLE ANCHOR CHANNEL 7. Anchor Channel Design Code Figure 9.3.2.4 — HAC CRFOS U — Single anchor channel — Obtuse angle Corner — Plan View. Acute Angle Corner Figure 9.3.2.5 — HAC CRFOS U — Single anchor channel — Obtuse angle Corner — Section View. Figure 9.3.2.2 — HAC CRFOS U — Single anchor channel — Acute angle Corner — Plan View. Shear: To determine the c a2 dimension while analyzing a acute corner, it is recommended to draw the projected area in perpendicular shear as shown in Figure 9.3.2.2. The darkened portion of the concrete is not utilized in the analysis, hence limiting to a shorter c a2 dimension. This is achieved by projecting the intersection of the concrete plane back to other side of the corner. Please refer to Figure 9.3.2.2 and Figure 9.3.2.3 covering the perpendicular shear analysis at acute degree corner. Please refer section 9.2.2 for Longitudinal shear method of analysis for acute angle corner for detail analysis of face of slab. Tension: Acute angle corners do not have the same amount of concrete throughout as 90 degree corners. The rebar can be bend having at least 12” in accordance to ACI-318 as shown in Figure 9.3.2.2. The pullout strength should be calculated by hand using 12” development length. The c b concrete cover is taken as minimum of the four s/2, c b1 , c b2 and c b3 dimensions. (s=spacing between rebars). Refer Figure 9.3.2.2 and Figure 9.3.2.3. Figure 9.3.2.3 — HAC CRFOS U — Single anchor channel — Acute angle Corner — Section View. 276 Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019 277