Some openings may not have the strength to withstand the mounting of heavy duty doors. For example plasterboard and steel stud or 50mm thick coldroom panel. These types of openings most likely will require 4000 Series Frames.

This frame is an anodised aluminium surround that mounts internally in the door opening (can be used externally) and creates a structurally sound framework.

The frame is fixed to the floor and inserts into standard trim channel. The bearings are premounted in the factory meaning installation is a simple procedure.