Assa 32, Model 34 UMB-BRACKET for Aluminum and Concrete Filled Headers, Solid Glass Door Mounting

Rev. A.5, 8/03 Page- 8

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 8 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. 8: USE OF THE ASB BRACKET ON ALUMINUM DOOR/FRAME WITH BLADE STOP

HEADER

DOOR

BLADE

STOP

ASB BRACKET

MAGNET

STRIKE

ALUMINUM DOOR AND FRAME

WITH BLADE STOP

K

C

O

S

L

A

E

N

L

G

O

A

E

H

2

M

IV

L3

SF

E

A

D

H

O

2

M

R

2

O

6

-

2

F

B

S

-3

.

A

B

S

N

A

W

O

H

IS

S

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.

2.5.3 SOLID GLASS DOOR MOUNTING

The Magnalock is an excellent choice for securing 100% glass doors with no aluminum rail. The magnet is suspended in normal fashion from the header and the difficulty in the installation is mounting the strike plate on the glass door as glass cannot be drilled. This is accomplished by using Securitron's model GDB (or GDBM with metric fasteners) Glass Door Bracket and model AKG Adhesive Kit for Glass (see Figure 10). The GDB bracket will work with either the model 32, model 62, or model 82 Magnalock (but not with the model 34). The bracket is affixed to the glass surface by a special adhesive and the strike screws into the bracket conventionally. The adhesive provides a permanent bond stronger than the holding force of the Magnalock.