David Deck Guy
Structural
- Aug 18, 2023
- 34
I posed this question to both Dewalt and Hilti. Dewalt told me I didn't need to apply spacing reduction factors and they would clarify their tables in next additions. Hilti gave me more of a boiler plate answer that instructed me to refer to their table but ultimately its up to my engineering judgement. While Dewalt gave the me answer I want, I really want to go with Hilti because they give much more capacity in the direction of concern. I want to bounce this off of you guys before I run with my "engineering judgement" on this one.
For Hilti HIT-HY 270 post installed anchor rods, the Hilti product guide specifies me to use a spacing reduction factor if spacing is less than 16". If I have anchors spaced 9" apart in 8" CMU that are loaded perpendicular to the edge, I don't think I need to use their spacing reduction factor since the edge is only 3.625" from the bolt and the breakout cones won't overlap at all. Is there a limit state I'm missing where these bolts can interfere when they are 9" apart in 8" CMU?
For Hilti HIT-HY 270 post installed anchor rods, the Hilti product guide specifies me to use a spacing reduction factor if spacing is less than 16". If I have anchors spaced 9" apart in 8" CMU that are loaded perpendicular to the edge, I don't think I need to use their spacing reduction factor since the edge is only 3.625" from the bolt and the breakout cones won't overlap at all. Is there a limit state I'm missing where these bolts can interfere when they are 9" apart in 8" CMU?
