Wayne-Dalton 451 - Manual (Page 13)

13
FIG R
REAR SUPPORTS
After spring(s) are wound, cautiously remove locking pliers from vertical tracks, while pushing downward on door to prevent it from raising unexpectedly, in case spring(s)
were over wound. Carefully and slowly raise door, until one and a half sections are in the horizontal tracks. Lock door in this position using locking pliers attached to
vertical tracks above bottom roller on one side and below bottom roller on other side of door.
Space the horizontal tracks 3/4”-7/8” from section edge and level. Using 1-5/8” x 2-3/8” x 12 Ga. angle, fabricate back hangers and attach them to building as shown in
FIG R using 3/8” bolts and nuts. Laterally brace all drop angles once proper spacing is achieved.
Doors over 11 ft. high and over 14 ft. wide must have (1) intermediate drop hanger as shown in FIG R.
Doors over 16’ high must have (2) intermediate drop hangers as shown in FIG R.
INTERMEDIATE HANGERS FOR ALL DOORS OVER
11’ HIGH AND OVER 14’ WIDE. POSITIONED HALF
WAY BETWEEN JAMB AND BACK HANGER.
LATERAL BRACE ALL
HANGER ANGLES.
USE A 3/8” X 3/4”
TRUSS BOLT FOR
ROLLER CLEARANCE.
3/8” DIA. BOLT SHOULD
PROTRUDE INTO TRACK TO
SERVE AS A ROLLER STOP.
APPLY LOCKING PLIERS TO VERTICAL TRACK ABOVE
AND BELOW BOTTOM ROLLERS, ON EACH SIDE , TO
SECURE WHILE ATTACHING BACK HANGERS.
USE 12 GA. MINIMUM ANGLE
(1-5/8” X 2-3/8”)
3/4”-7/8”
DOORS OVER 16’ HIGH USE 2
INTERMEDIATE HANGERS.
INTERMEDIATE HANGERS. BACK HANGERS.