STI STI-1230 Stopper II without Horn with Spacer Fire Label

Overview

The STI-1230 is a fire-labeled spacer component for the Stopper II door strike family. This accessory installs between the strike housing and door frame to accommodate specific door thickness or frame-depth requirements in fire-rated or standard door openings. Use this when baseline Stopper II strike geometry does not align with your actual frame pocket depth — a common constraint in retrofit installations or where door thickness varies across a facility.

Compatibility

The STI-1230 spacer integrates with STI Stopper II strike models. Verify your existing or planned strike assembly before ordering — spacer compatibility depends on the specific Stopper II variant in your strike family (e.g., surface-mounted, recessed, or mortise configurations). Confirm strike model number against this spacer to ensure proper fit and function.

Installation Notes

The fire label on this component indicates it meets fire-safety certification standards for use in fire-rated door assemblies. When installing, position the spacer between the strike body and door frame as specified in your strike assembly documentation. Ensure all fasteners are torqued to manufacturer spec and that the spacer does not interfere with strike armature travel or latch function. Fire-labeled components must remain in place and unmodified to maintain door assembly fire rating.