Instructions / Assembly

Distributed by MIDWEST AIR TECHNOLOGIES, INC.
6700 WILDLIFE WAY, LONG GROVE, IL 60047
TEL: [phone] • FAX: [phone] • www.mat-holdings.com
MIDWEST AIR TECHNOLOGIES, INC.
ANSI: America National Standard Institute
DASMA: Door & Access Systems
Manufacturer’s Association, International
How to Measure an Extension Spring
OR
How to Measure a Torsion Spring
We will require the garage door weight and height, if you are not sure which spring you need.
1. The weight an extension spring can support is marked by the color code at the end of the spring.
2. Measure the garage door height. The standard height is usually 6 foot 6 inches or 7 feet.
EXTENSION SPRINGS
SPRING
COLOR CODE
WEIGHT IN LBS.
SINGLE DOOR
WEIGHT IN LBS.
DOUBLE DOOR
GOLD
LT. BLUE
TAN
WHITE
GREEN
YELLOW
BLUE
RED
BROWN
ORANGE
GOLD
LT. BLUE
TAN
80
90
100
110
120
130
140
150
160
170
180
190
200
190
200
210
220
230
240
250
260
270
280
290
300