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Hollow Metal (Steel) Frame Mounting
Most steel door frames include a 4-7/8" ANSI strike. This type of door preparation allows simple installation of the Securitron UnLatch.
1
Remove the existing strike plate (it will be
discarded) and experimentally try to fit the
Securitron UnLatch in the resulting cavity.
x
In some cases
the cavity will be large enough to
accommodate the Securitron UnLatch and you will have
nothing to do but pull the wires up the hollow door
frame and screw the Securitron UnLatch into place.
x
In other cases
you will find a “dust box” within the frame
that will get in the way of the Securitron UnLatch.
2
The dust box must be cleared away to make room for the Securitron
UnLatch. Generally a sabre saw or a drill with a fly cutting bit is the
most effective tool to do this. You can also find that the edge of
the dry wall panel interferes with the Securitron UnLatch. Simply
chip away some of the dry wall with a screwdriver to make room.
3
Once you are able to fit the Securitron UnLatch into
the frame, vacuum out any concrete dust and metal
shavings (these can work their way into the Securitron
UnLatch mechanism and cause problems).
x
If the hollow metal frame has a 2-3/4” strike
, installation
of the Securitron UnLatch is still possible but it is much
more difficult. You will have to route out a larger strike plate
recess to convert the door preparation to 4 7/8 ANSI and this
includes setting mounting tabs within the frame. Generally,
commercial locksmiths have the skills to perform this work.
Wood Frame Mounting
Installation in a wood frame is straightforward. It is a question of using a chisel to create a space for the Securitron UnLatch behind the existing
strike. The procedure depends on whether you have a 4-7/8" ANSI strike (commercial) or a 2-3/4" ANSI strike (residential) on the door.
4-7/8" ANSI strike
In the case of a 4-7/8" ANSI strike, you will be using the existing
holes that mount the strike to mount the Securitron UnLatch.
1
Remove the strike and place the template on the door (registering
it to the strike mounting holes). This will show you the space
that must be chiseled out. As you get close to finishing the
chiseling job, experimentally try to fit the body of the Securitron
UnLatch in the cavity. This will avoid chiseling too big a space.
2
A tight fit is preferred as it helps the solidity of the mounting
which is important if the door receives abuse. Normally, with
a wood frame, the wires will be run inside the wall. Simply
drill from the back of the cavity you have created rearward
into the wall space to admit the wires into the walls.
3
To mount the Securitron UnLatch to the wood frame, use the
two #12 x 1” flat head wood screws which have been furnished.
4
Once you are able to fit the Securitron UnLatch into
the frame, vacuum out any concrete dust and metal
shavings (these can work their way into the Securitron
UnLatch mechanism and cause problems)
2-3/4" ANSI strike
In the case of a 2-3/4" ANSI strike, you will be using two new
holes which are separated more widely to mount the Securitron
UnLatch. You will also have to perform two chiseling operations.
• You will have to chisel a deep cavity
for the body of the Securitron
UnLatch and a shallow relief (3/32” or 2 MM deep) to fit the
Securitron UnLatch’s face plate flush with the frame surface.
• A template is provided
(page 8) to guide this chiseling but some
work needs to be done to register the template to the frame.
1
Draw two lines with a pencil on the door frame
(see Diagram 4)
.
x
The first line
is horizontal and bisects the 2-3/4" ANSI strike.
x
The second
is vertical and extends the edge of the
strike opening which captures the latch.
2
Remove the strike and introduce the template.
NOTE:
that the template shows a center line arrow which you
will use to position the Securitron UnLatch vertically by lining
it up with the center line you have previously drawn.
3
Next, the template has arrows at the top and bottom which
line up with the vertical extension line you have drawn. These
arrows position the Securitron UnLatch horizontally so that the
separation between the two Securitron UnLatch plungers is 1/16”
farther from the stop than the edge of the ANSI 2-3/4" strike. The
latch is captured by the Securitron UnLatch at the separation
line between the plungers and moving this position somewhat
away from the stop increases adjustability of the installation.
4
When you have the template correctly positioned,
mark your top and bottom mounting holes.
5
Then you will need to chisel out a shallow space 3/32” (2MM)
under the complete outline of the Securitron UnLatch and
chisel a rectangular cut-out as the template shows, 1 3/4”
(44.5MM) deep to admit the Securitron UnLatch body.
x
As you get close to finishing the chiseling job,
experimentally try to fit the Securitron UnLatch body in
the cavity. This will avoid chiseling too big a space.
x
A tight fit is preferred as it helps the solidity of the mounting
which is important if the door receives abuse.
x
Normally, with a wood frame, the wires will be run inside the
wall. Simply drill from the back of the cavity you have created
rearward into the wall space to admit the wires into the walls.
6
To mount the Securitron UnLatch to the wood frame, use
the two furnished #12 x 1” flat head wood screws.
NOTE:
finally that we have implied that there are only two types of
strikes on wooden doors: the ANSI 4-7/8" and the ANSI 2-3/4".
x
In residential applications there are also square shaped
strikes (particularly found with inexpensive imported
latches) which are smaller in outer dimensions than the
2-3/4" strike. These pose no difficulties. The installation
techniques are the same as for an ANSI 2-3/4" strike.
