The same process utilized for calculating tension breakout cones in face of CMU installations can be used for anchors in bed joint installations.
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Design example— Fully grouted CMU construction
The following design example, based on the masonry anchor design provisions of ICC-ES AC58, is intended for illustration purposes only.
Parameters
Tension failure modes
Steel failure— Nominal strength
N sa = A se, N f uta N sa = 0.1419 in. 2
N sa = 8, 230 lbs
58, 000 psi
Masonry breakout failure— Nominal strength
N mbg = A Nm A Nmo ψ ec, N, m ψ ed, N, m ψ c, N, m N b, m
Anchor element
• Hilti HIT-HY 200-R V3 Adhesive Anchor
• HAS-V-36 Threaded Rod( ASTM F1554)
• d anchor =. 500 inches | h ef = 5.00 inches
Masonry parameters
• Uncracked, Fully Grouted CMU Construction
• Dry Masonry Conditions | Seismic Category A
• Temperature Range A Conditions
• f ́m = 1,500 psi | h = 8.00 inches( nominal)
Design loads
• N ua = 1,000 lbs
• V ua, x = 1,000 lbs
A Nm = 1.5h ef + 8 in. + 1.5h ef 5. 813 in. + 2. 187 in. A Nm = 7.5in. + 8in. + 7.5in.)( 8 in. A Nm = 184 in. 2
A Nmo = 9 × h ef
2
A Nmo = 9 × 5 in. 2 A Nmo = 225 in. 2 ψ ec, N, m = 1.0( No Eccentricity Present)
ψ ed, N, m = 0.7 + 0.3 c a, min 1.5h ef 2. 187 in. ψ ed, N, m = 0.7 + 0.3
7.5 in. ψ ed, N, m = 0.787
ψ c, N, m = 1.0( Found in ESR)
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