How to use these charts:
- The following tables are for reduced End and Edge Distance and Spacing.
- Locate the anchor size to be used for either a tension and/or
shear load application. - Locate the embedment (E) at which the anchor is to be installed.
- Locate the end or edge distance (Cact) or spacing (Sact) at which the
anchor is to be installed. - The load adjustment factor (fc or fs) is the intersection of the row and column.
- Multiply the allowable load by the applicable load adjustment factor.
- Reduction factors for multiple edges or spacing are multiplied together.
- Adjustment factors do not apply to allowable steel strength values.
- Adjustment factors are to be applied to allowable Tension or Shear Load
Based on CMU Strength values only.
End Distance Tension (fc)
Edge Distance Tension (fc)
**The allowable tension load reduction factor is permitted to equal 1.0 provided both of the following conditions are met: (a) The anchor is installed with a minimum end distance, Cmin, between 4 inches and 8 inches; and (b) a masonry return wall of identical construction is on the opposite side (such as two masonry walls intersecting at a building corner).
- E = Embedment depth (inches).
- Cact = actual end or edge distance at which anchor is installed (inches).
- Ccr = critical end or edge distance for 100% load (inches).
- Cmin = minimum end or edge distance for reduced load (inches).
- fc = adjustment factor for allowable load at actual end or edge distance.
- fccr = adjustment factor for allowable load at critical end or edge distance. fccr is always = 1.00.
- fcmin = adjustment factor for allowable load at minimum end or edge distance.
- fc = fcmin + [(1 - fcmin) (Cact - Cmin) / (Ccr - Cmin)].
End and Edge Distance Shear (fc)
Shear Load Perpendicular
to End or Edge
End and Edge Distance Shear (fc)
Shear Load Parallel
to End or Edge
- E = Embedment depth (inches).
- Cact = actual end or edge distance at which anchor is installed (inches).
- Ccr = critical end or edge distance for 100% load (inches).
- Cmin = minimum end or edge distance for reduced load (inches).
- fc = adjustment factor for allowable load at actual end or edge distance.
- fccr = adjustment factor for allowable load at critical end or edge distance. fccr is always = 1.00.
- fcmin = adjustment factor for allowable load at minimum end or edge distance.
- fc = fcmin + [(1 - fcmin) (Cact - Cmin) / (Ccr - Cmin)].
Spacing Tension (fs)
Spacing Shear (fs)
- E = Embedment depth (inches).
- Sact = actual spacing distance at which anchors are installed (inches).
- Scr = critical spacing distance for 100% load (inches).
- Smin = minimum spacing distance for reduced load (inches).
- fs = adjustment factor for allowable load at actual spacing distance.
- fscr = adjustment factor for allowable load at critical spacing distance. fscr is always = 1.00.
- fsmin = adjustment factor for allowable load at minimum spacing distance.
- fs = fsmin + [(1 - fsmin) (Sact - Smin) / (Scr - Smin)].