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 h oles for t h e Magn et mou n tin g scr ews. Th ese are t he ASB-32, AS B-62 or ASB-82
(with finish suffix CL or BK) . Figu re 6 shows th e use of th e Alumin um Shim B racket (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 W ITH BLADE STOP
STOP
HEADER
DOOR
STRIKE
MAGNET
BLADE
ASB BRACKET
ASB-32 FOR MODEL 32 MAGNALOCK
IS SHOWN. ASB-62/82 HAS FIVE HOLES
ALUMINUM D OOR AND FRAME
WITH BLADE STOP
SEX BOLT, STRIKE M OU NT ING SCREW AND HOLE IN DO O R CAN ALL BE RAISED BY
1/4" WHEN OFFSET STR IK E IS U SED WITH MODEL 62 TO SUIT NARR OW RA IL
Another prob lem t hat c an arise wit h alu minu m fram e glas s doors is that in c ertain cases with
the model 62, th e heigh t of t he al umin um rail at th e top of the d oor is n ot suf ficien t to mou nt
the strike and sex bolt. Even when the sex bolt is installed in the lowest area of the top rail, the
top edge of th e st rike wil l p rotr ud e ab ove th e rail . To sol ve th is p rob l em, S ecu ritr on of fers t h e
offset strike. The holes in the strike plate are offset 1/4" (6.4mm) from the center of th e 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 addit ion al c har ge if it' s cal l ed out with t he or der or may be s ent as a rep l acemen t for t he
standard strike. This p r ob lem does n ot occur with t he more narrow mod el 32 or 34 so no of f set
strike is offered with them.
2.5.2. THE UM B-BRACKET FOR ALUMI NUM AND CONCRETE FILL ED HEADERS
The UMB-34 bracket replaces t he f u nc tion s of th e ASB b racket (s ee pr evious d rawin g ) an d t h e
CWB bracket ( see Section 2.5.5) wh ich permits mou nting on wood or concrete filled st eel
headers. Th e UMB h as the uniq ue benef it of being reversib le which alters the pr oj ection 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 d ifferent appl ications.
Wood screws are pres ent for moun ting on wood headers; c ap screws are pres ent for
install ation in to bl ind nu ts and sheet metal screws are p resent for op tional moun tin g on st eel
headers.