Tip Sheet - Mounting Guidance - Core Mount


Due to the variety of floor surfaces, customers must supply the connecting hardware for the base, i.e. screws, bolts, anchor bolts, grout, etc. Please use this document for guidance only.

Unlike surface mount and fascia mount railing posts, the core post-installation method is solely used for installing railing systems on hard surfaces such as concrete or stone pavers. Railing posts installed using a core drill method are anchored by embedding the post’s base in the floor surface using grout rather than attaching it on top of the surface. Railing posts that have been installed using the core drill method often add an unmatched look of seamless elegance.

core mount


Core Drilling is a process where a cylindrical core or “slug” of concrete is removed from the pavement to create a hole to accommodate a post or pole. The basic steps to install a railing system using the core drill method include:

    • First, the core hole is drilled. This hole should be a minimum of 1 inch larger than the diameter of the railing post. We strongly recommend a minimum of 4 inches. Increasing the embedded depth of the post to a minimum of 4 inches increases the pull-out strength of the installed post.

Core Drilling uses friction and water to smoothly bore the hole, keeping the concrete or stone surface intact and waterproof. The most commonly used tool for this process is a diamond concrete-core drill. The diamond-tipped core drill forms clean, circular holes.

    • The post is inserted into the hole and carefully shimmed allowing space to pour the grout on all sides.
    • Next, the railing post is secured in place by applying the anchoring non-shrinking grout. The grout functions to keep the post in place and as a weatherproofing agent.
    • Remember to form a chamfer on on the top of the grout to assist with water runoff.

Customers are responsible to complying with their local building codes and/or architects guidelines therefore Inline Design shall, in no way be liable for any incidental or consequential damages caused.