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Rev. A.3, 5/00 Page- 7
method is to space the magnet down so as to clear the blade stop. This generally requires 1/2”
of spacing (12.7mm) and Securitron offers brackets of the appropriate width with pre-drilled
clearance holes for the Magnet mounting screws. These are the ASB-32, ASB-62 or ASB-82
(with finish suffix CL or BK). Figure 6 shows the use of the Aluminum Shim Bracket (ASB).
Note that this bracket is not offered with the model 34. The UMB-34 bracket accomplishes the
same function.
FIG. 7: USE OF THE ASB BRACKET ON ALUMINUM DOOR/FRAME WITH BLADE STOP
STOP
HEADER
DOOR
STRIKE
MAGNET
BLADE
ASB BRACKET
A
S
B
-
3
2
F
O
R
M
O
D
E
L
3
2
M
A
G
N
A
L
O
C
K
I
S
S
H
O
W
N
.
A
S
B
-
6
2
/
8
2
H
A
S
F
I
V
E
H
O
L
E
S
ALUMINUM DOOR AND FRAME
WITH BLADE STOP
SEX BOLT, STRIKE MOUNTING SCREW AND HOLE IN DOOR CAN ALL BE RAISED BY
1/4" WHEN OFFSET STRIKE IS USED WITH MODEL 62 TO SUIT NARROW RAIL
Another problem that can arise with aluminum frame glass doors is that in certain cases with
the model 62, the height of the aluminum rail at the top of the door is not sufficient to mount
the strike and sex bolt. Even when the sex bolt is installed in the lowest area of the top rail, the
top edge of the strike will protrude above the rail. To solve this problem, Securitron offers the
offset strike. The holes in the strike plate are offset 1/4" (6.4mm) from the center of the strike
and this allows successful mounting on a narrow top rail. An approximate 10% loss of holding
force results from the skewed position of the strike mounting screw but this is not significant on
aluminum frame glass doors which are not high security barriers. The offset strike is supplied
at no additional charge if it's called out with the order or may be sent as a replacement for the
standard strike. This problem does not occur with the more narrow model 32 or 34 so no offset
strike is offered with them.
2.5.2. THE UMB-BRACKET FOR ALUMINUM AND CONCRETE FILLED HEADERS
The UMB-34 bracket replaces the functions of the ASB bracket (see previous drawing) and the
CWB bracket (see Section 2.5.5) which permits mounting on wood or concrete filled steel
headers. The UMB has the unique benefit of being reversible which alters the projection of the
bracket with respect to the top of the magnet body and allows coping with different stop
thicknesses. The bracket is delivered with a selection of fasteners for different applications.
Wood screws are present for mounting on wood headers; cap screws are present for
installation into blind nuts and sheet metal screws are present for optional mounting on steel
headers.