Tension and Shear Loads for Threaded Rod Anchors in 6 and 8-Inch Normal-Weight Grout-Filled CMU

1. Threaded rods must comply with ASTM F1554 Grade 36 minimum.
2. Values for 6- and 8-inch wide concrete masonry units (CMU) with a minimum specified compressive strength of masonry, f'm, at 28 days is 1500 psi.
3. Embedment depth is measured from the outside face of the concrete masonry unit for installations through a face shell.
4. Allowable loads may be increased 33 1/3% for short-term loading due to wind or seismic forces where permitted by code.
5. Refer to in-service temperature sensitivity chart for allowable load adjustment for temperature.
6. The tabulated allowable loads are based on a safety factor of 5.0 for installations under the IBC and IRC.
7. Anchors must be spaced a minimum distance of four times the anchor embedment.

Figure 1: Allowable anchor placement in grouted CMU face shell

Figure 2: Anchor placement in grouted CMU mortar "T" joint

Tension and Shear Loads for Threaded Rod Anchors in 6 and 8-Inch Normal-Weight Grout-Filled CMU

1. Threaded rods must comply with ASTM F1554 Grade 36 minimum.
2. Values for 6- and 8-inch wide concrete masonry units (CMU) with a minimum specified compressive strength of masonry, f'm, at 28 days is 1500 psi.
3. Embedment depth is measured from the outside face of the concrete masonry unit for installations through a face shell.
4. Allowable loads may be increased 33 1/3% for short-term loading due to wind or seismic forces where permitted by code.
5. Refer to in-service temperature sensitivity chart for allowable load adjustment for temperature.
6. The tabulated allowable loads are based on a safety factor of 5.0 for installations under the IBC and IRC.
7. Anchors must be spaced a minimum distance of four times the anchor embedment.
8. Shear load applied perpendicular to edge of CMU wall.
9. Shear load applied parallel to edge of CMU wall.

Figure 3: Anchor installed in cell opening (top of wall)