What type of anchor can be safely used in hollow concrete block?

The use of a sleeve anchor in hollow concrete block is appropriate because sleeve anchors are designed specifically to expand within a drilled hole, providing a secure and stable connection. When installed correctly, the sleeve anchors exert pressure against the sides of the hole, allowing them to grip securely even in materials that are not solid, like hollow concrete blocks. This characteristic is crucial because hollow blocks possess voids that can compromise the integrity of other types of anchors.

Sleeve anchors come in various lengths and diameters, making them versatile for different applications. They are ideal for attaching items to concrete, masonry, or similar substrates, ensuring that the load is distributed effectively and reducing the risk of failure. In situations where a strong, reliable anchor point is essential, sleeve anchors provide the necessary strength and holding power.

While considering the other options, toggle bolts and expansion bolts are not recommended for hollow concrete blocks due to the potential for insufficient anchoring. A toggle bolt requires a hollow cavity to work effectively, and when used in a hollow block, it may not provide the necessary load-bearing capacity. Expansion bolts, on the other hand, require solid material for proper expansion, making them unsuitable for the voids found in hollow blocks. Threaded rods generally need a more robust anchoring system