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Understanding Overhead Doors - Part 1(Necessary Data For Torsion Spring Design)

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1

NECESSARY DATA FOR TORSION SPRING DESIGN

Lifting method

Door panel size

(width x height)

The weight of 

the door panel

Weight of accessories

Winding wheel model

Is anti fall installed

Standard 

improvement

eg.4000X2400mm

Weight of the light door panel Weight of all accessories installed on the door panel

8、12、18、32

flat wheels

Is anti fall installed

Note: Standard lift doors are equipped with a cable break safety device or a torsion spring break safety device. Special consideration must be given when designing the torque of the torsion spring. Ensure that when the door is fully opened to the top position, the anti-drop device does not get caught in the track and that the pulley continues to rotate without being blocked by the anti-drop wheel on the torsion spring shaft.

If a cable break and fall protection device is installed, bumpers (door pushers) must be installed at the rear end of the track.

23

NECESSARY DATA FORTENSION SPRING DESIGN

Door panel size

(width x height)

Specific gravity 

of door panels

Weight 

of accessories

eg.3000X3000mm

7.5kg/m

0.5kg/m²


TENSION SPRING ACCESSORIES

2 Tension Springs Per Set4

2 steel wire ropes per set,

length=door height ×2-2.25 times5

2 Safety Wire Ropes Per Set6 4 Pulleys Per Set7 2 Pulley Forks Per Set8

Steel wire rope locking plates

2 pieces per set9

S-Hook,4 Pieces Per Set10

10x304 Pieces Per Set11

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