Atrium 16 mm manual tongue version multipoint lock replacement kit of old style GU Tripact locks.

This is a 3 point locking system that features two tongue latches and a deadbolt.
All three locking points are engaged by lifting the handle.

This is NOT a direct replacement for the Atrium door lock. It requires minor modifications. See additional pictures of Atrium old-style and Atrium replacement lock comparisons.

Replacement Locks Measurements:
Overall Length: 69-3/4 Inch
Backset: 35 mm (1-3/8 inch)
Handle Height: 31-1/8 inch
Handle Spacing (PZ): 92 mm
Top Tongue Position: 32-1/2 inch above handle
Bottom Tongue Position: 26-3/4 inch below handle
Ends: Radius / Rounded

Note:This replacement was developed to replace the discontinued G-U Tripact tongue version lock.
It may not work as a replacement for other locks.
Although the measurements for the two locks are nearly the same, the Deadbolt and Spring Latch strike plates may need to be adjusted on the door jamb.
In addition to relocating the strike and or strikes, you may need to chisel out a small portion of the door jamb to accommodate the Deadbolt and Spring Latch.

Discontinued G-U Atrium Tripact Lock:
Overall Length: 69-3/4 inch, with radius ends.
Handle Height: 31-1/8 inches, from bottom of radius faceplate.
Handle to top of face plate: 38-3/8
Bottom Tongue: 26-3/8 inches
Top Tongue: 33 inches.
Backset: 1-3/8 (35 mm)
Handle PZ Spacing: 3-5/8 ( 92 mm) center of cylinder / handle
Key Cylinder Hole: Flat Tail piece, standard 5 pin American
Uses standard American version 5 pin cylinder with Flat Tail Piece.
Top of Spring latch to bottom of Deadbolt is 4-1/2 inches.

Priced and sold as a package.

To Change Handing:
1. Insert screw driver into slot, push down
2. Push lever down till you here a click, release handle
3. Latch comes out, reverse and push latch in all the way and hold
4. Push lever down till it clicks.
5. Release lever and check function.