Which component is used to anchor the base to a concrete slab?

• A. Masonry Anchors
• B. Lag Screws
• C. Platform Gate
• D. Control Box

Answer: (A)

Anchoring a heavy base to a concrete slab requires a fastener that can reliably grip solid concrete and withstand the operating forces of the escalator. Masonry anchors are designed for exactly this purpose—they are installed into predrilled holes in concrete and expand or set to bite into the material, securing the base plate firmly. This prevents movement under load, vibration, and startup/shutdown stresses, which is essential for safe, stable operation.

Lag screws can be used in some concrete applications, but they aren’t the standard choice for securing a large base plate to a concrete slab in escalator installations, and they may not provide the same dependable grip under dynamic loads. The platform gate and the control box have safety and electrical roles rather than anchoring functions, so they don’t serve to attach the base to the slab.