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 Openers		Door Height	Rail Length (Inches)	Length Overall (Inches)
Single Light		7 Foot	116	124
		8 Foot	128	136
		10 Foot	152	160
Dual Light(Front and Back)		7 Foot	116	128
		8 Foot	128	140
		10 Foot	152	164
Dual Light (Side-to-Side)		7 Foot	116	124
		8 Foot	128	136
		10 Foot	152	160

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Belt Drive Garage Door Openers Installation Lengths

Belt Drive Openers		Door Height	Rail Length (Inches)	Length Overall (Inches)
Dual Light (Front and Back)		7 Foot	116	128
		8 Foot	128	140
		10 Foot	152	164
Dual Light (Side-to-Side)		7 Foot	116	123
		8 Foot	128	135
		10 Foot	152	159
Low-Profile		7 Foot	118	125
		8 Foot	128	135
		10 Foot	152	159

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Screw Drive Garage Door Openers Installation Lengths

Screw Drive Openers		Door Height	Rail Length (Inches)	Length Overall (Inches)
Single Light		7 Foot	113	121
		8 Foot	124	133
Dual Light (Front and Back)		7 Foot	113	124
		8 Foot	124	136
Low-Profile		7 Foot	108	123
		8 Foot	120	135

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ATS Chain Garage Door Openers Installation Lengths

ATS Chain		Door Height	Rail Length (Inches)	Length Overall (Inches)
One-Piece Rail		8 Foot	128	136
		10 Foot	152	160
		12 Foot	182	190
Two-Piece Rail		14 Foot	206	214

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