PHI D-4990, Manual, Page: 21 / 66

DOOR WIDTH
Back-check/INCHES 10 degrees
30”
5-3/8”
10-3/4”
16-1/8”
36”
6-3/8”
12-3/4”
19-1/8”
Back-check/INCHES 20 degrees
Back-check/INCHES 30 degrees
42”
7-1/2”
15”
22-1/2”
80
70
60
44”
7-7/8”
15-3/4”
24-1/2”
48”
8-1/2”
17”
25-1/2”
o
o
o
90 degrees
Closed
80 70 60 degrees
10 degrees latch
To determine the backcheck angle, put the door into a 90
o
(full open)
position and measure back toward the latch, taking into account the door
width, and mark the floor with tape or chalk
(Take measurements from the
outside leading edge of door).