DOC11 — Cold Room Door Opening Preparation & Installation Checklist

Clear opening size is the usable internal passage width and height when the door leaf is fully open (e.g., 1200×2100 mm for pallet jacks). Wall cut-out size is the structural opening cut into the panel or masonry wall to receive the door frame, typically +70/+80 mm wider and +40/+50 mm higher depending on the frame profile.

For pedestrian or hand-trolley access up to 1100 mm clear width, a hinged cold room door (D01) is ideal. Whenever pallet jacks or forklifts operate, corridors are narrow, or clear width is 1200 mm and above, a sliding cold room door (D02) should be selected to eliminate leaf sag and save corridor swing space.

In sub-zero rooms below 0°C, moisture condenses and freezes around the perimeter gasket. An integrated frame and threshold heater cable prevents the EPDM gasket from freezing onto the aluminium frame, avoiding gasket tearing and door jamming.

All SerPan Cold hinged and sliding cold room doors feature a standard glow-in-the-dark internal safety release handle (anti-panic mechanism) that unlocks and opens the door from the inside with a single push, even if padlocked or key-locked from outside.

For any doorway used by pallet jacks, wheeled trolleys, or forklifts, a flush floor (thresholdless) configuration with a drop-seal bottom gasket is mandatory. Stepped stainless steel thresholds are only used for pedestrian-only rooms where floor panels sit above an existing slab.

In addition to clear door width and height, we require the monorail track height from finished floor level, track profile type (tubular or flat/I-beam), centerline offset relative to the door opening, and top slot clearance dimensions.