ST82 Grade-A Security Door - 21-Point Lock & Steel Core

This Grade-A certified door features a 10cm-thick zinc-alloy steel panel with aerospace aluminum honeycomb and steel rib filling, achieving STC 35dB soundproofing. The 3-stage 21-point locking system (ANSI Grade 1) and reinforced hinges withstand 500kg+ impact forces.

Measure The Door Opening

Note: The floor must be leveled before measurement. Space for tiling the floor and installing flooring should be reserved. If there are ceramic tiles on the wall, space for the ceramic tiles should be reserved.

Opening Direction Selection

Select either inward-swing (standard residential choice) or outward-swing (common for commercial applications or specific project requirements).

To identify left-hand or right-hand swing:

Position yourself outside the door facing it

Observe hinge placement:

Hinges on left = Left-hand door

Hinges on right = Right-hand door