Length of anchor is measured from underside of head to end of anchor. using a torque wrench, driver drill or cordless 1/4' impact driver with a maximum permitted torque rating of 100 ft. Models THD37134H and THD37212H do not meet minimum embedment depth requirements for strength design and require maximum installation torque of 25 ft. Im very concerned abour using typical conrete/brick expansion anchors in this situation. I understand that the blocks are covered on the inside with a 'mud' layer, then plaster. Not for use in other corrosive or outdoor environments. The construction of the home is terra cotta block (or 'bricks'). Intended for some pressure-treated wood sill plate applications. Mechanical galvanizing meets ASTM B695, Class 65, Type 1. Larger holes are not required for wood or thinner cold-formed steel members. Suggested fixture hole sizes are for structural steel thicker than 12 gauge only.

Tighten the anchor into the base material until the hex-washer head contacts the fixture.

Insert the anchor through the fixture and into the hole.

(Overhead installations need not be blown clean.) Alternatively, drill the hole deep enough to accommodate embedment depth and the dust from drilling and tapping. Drill the hole to the specified embedment depth plus minimum hole depth overdrill (see table below) to allow the thread tapping dust to settle, and blow it clean using compressed air.

Drill a hole in the base material using a carbide drill bit the same diameter as the nominal diameter of the anchor to be installed.

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Hilti anchors in cmu block