For all the "Rite" Loading Dock Solutions

OVERHEAD DOORS - CLEARANCE CHARTS

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Headroom Clearances

Standard Lift Door
2" and 3" Hardware

Hi-Lift Door
2" and 3" Hardware

Vertical Lift Door
2" and 3" Hardware

Low Headroom:
Vertical Lift Door 2" and 3" Hardware
Front Mount Springs 2" and 3" Hardware

Rear Mount Springs 2" and 3" Hardware

Drums	2"	2"	3" or Super 3"
Drums	12" R	16" R	3" or Super 3"
Standard Lift
D400-144	13"	16.5"	18"
D525-216	14.5"	18.5"	19"
D800-312	16.5"	19.5"	21"
High Lift
D400-54	n/a	HL + 7.5"	HL + 9.5"
D525-54	n/a	HL + 9"	HL + 10.5"
D575-120	n/a	HL + 10"	HL + 12"
D6375-164	n/a	HL + 16"	HL + 18"
D800-120	n/a	HL + 17"	HL + 18.5"
Vertical Lift
850-132	Door Height + 22"
1100-216
1350-336
Vertical Lift (Low Headroom)
850-132	Door Height + 10"
1100-216
1350-336
Low Headroom Front Mount
D400-144	10.5"	18"
D525-216	11.25"		15.5"
D800-312	11.25"		15.5"
Low Headroom Rear Mount
D400-144	4.5"		7.5"
D525-216	5"
D800-312	5"

Wood Jamb
Headroom Side 1

Wood Jamb Overlapping Door
Headroom Side 3

Steel Jamb
Headroom Side 2

Steel Jamb Overlapping Door
Headroom Side 4

Jamb Details

	A	B	C	D
2"	1½"	3½"	1"	5"
3" or Super 3"	2"	4"	1"	6"

Design - Construction - Installation - Service