Assa Abloy Securitron DSB Series Installation And Operation Instructions Manual page 4

 The bar is level.
The bar is centered on the door (left to right) between the door frame stops.

By using the assembled bar as a template, the correct separation between the mounting holes
will automatically be maintained. After marking the hole locations, verify that the centers of the
holes are at the required distance as shown in Figure 4.
Figure 3
Figure 4
Page 3
PN# 500-22700
Rev. F, 03/11