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Important Information and General Notes

General Instructions for the Installer

These general instructions for the installer are provided to ensure the proper selection and installation of Simpson Strong-Tie products and must be followed carefully. They are in addition to the specific design and installation instructions and notes provided for each particular product, all of which should be consulted prior to and during the installation of Simpson Strong-Tie products.

  1. Do not modify Simpson Strong-Tie products as the performance of modified products may be substantially weakened. Simpson Strong-Tie will not warrant or guarantee the performance of such modified products.
  2. Do not alter installation procedures from those set forth in this catalog.
  3. Drill holes for post-installed anchors with carbide-tipped drills meeting the diameter requirements of ANSI B212.15 (shown in the table below). A properly sized hole is critical to the performance of post-installed anchors. Rotary-hammered drills with light, high-frequency impact are recommended for drilling holes. When holes are to be drilled in archaic or hollow base materials, the drill should be set to “rotation only” mode.
  4. For mechanical anchors requiring specific installation torque: Failure to apply the recommended installation torque can result in excessive displacement of the anchor under load or premature failure of the anchor. These anchors will lose pre-tension after setting due to pre-load relaxation. See Supplemental Topic M1 for more information.
  5. Do not disturb, bolt up, or apply load to adhesive anchors prior to the full cure of the adhesive.
  6. Use proper safety equipment.
Finished Diameters for Rotary and Rotary-Hammer Carbide-Tipped Concrete Drills per ANSI B212.15
Nominal Drill Bit Diameter (in.) Tolerance Range Minimum (in.) Tolerance Range Maximum (in.)
1/8 0.134 0.140
5/32 0.165 0.171
3/16 0.198 0.206
7/32 0.229 0.237
1/4 0.260 0.268
5/16 0.327 0.335
3/8 0.390 0.398
7/16 0.458 0.468
1/2 0.520 0.530
9/16 0.582 0.592
5/8 0.650 0.660
11/16 0.713 0.723
3/4 0.775 0.787
13/16 0.837 0.849
27/32 0.869 0.881
7/8 0.905 0.917
15/16 0.968 0.980
1 1.030 1.042
1 1/8 1.160 1.175
1 3/16 1.223 1.238
1 1/4 1.285 1.300
1 5/16 1.352 1.367
1 3/8 1.410 1.425
1 7/16 1.472 1.487
1 1/2 1.535 1.550
1 9/16 1.588 1.608
1 5/8 1.655 1.675
1 3/4 1.772 1.792
2 2.008 2.028