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The installed length of my LiftMaster® garage door opener

Before installation, make sure you have adequate room to mount your LiftMaster garage door opener. Using the charts below, find the total length of the type of garage door opener you are installing. Then, measure outward from the header wall towards the back of the garage using the measurement obtained from the chart. The space should be free of support beams, poles, or other obstructions.

Chain Drive Garage Door Openers Installation Lengths

Chain Drive OpenersDoor HeightRail Length (Inches)Length Overall (Inches)
Single Light7 Foot116124
8 Foot128136
10 Foot152160
Dual Light(Front and Back)7 Foot116128
8 Foot128140
10 Foot152164
Dual Light (Side-to-Side)7 Foot116124
8 Foot128136
10 Foot152160

Belt Drive Garage Door Openers Installation Lengths

Belt Drive OpenersDoor HeightRail Length (Inches)Length Overall (Inches)
Dual Light (Front and Back)7 Foot116128
8 Foot128140
10 Foot152164
Dual Light (Side-to-Side)7 Foot116123
8 Foot128135
10 Foot152159
Low-Profile7 Foot118125
8 Foot128135
10 Foot152159

Screw Drive Garage Door Openers Installation Lengths

Screw Drive OpenersDoor HeightRail Length (Inches)Length Overall (Inches)
Single Light7 Foot113121
8 Foot124133
Dual Light (Front and Back)7 Foot113124
8 Foot124136
Low-Profile7 Foot108123
8 Foot120135

ATS Chain Garage Door Openers Installation Lengths

ATS ChainDoor HeightRail Length (Inches)Length Overall (Inches)
One-Piece Rail8 Foot128136
10 Foot152160
12 Foot182190
Two-Piece Rail14 Foot206214
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The installed length of my LiftMaster® garage door opener