# Commercial Door Clearance Checklist

From Uptime Dock & Door Research · Version 1.0 · September 2026
Companion to: Commercial Garage Door Headroom & Track Clearance Chart
https://uptimedockanddoor.com/research/commercial-garage-door-headroom-chart/

Use this to record what you have before asking for a quote. It helps you ask the right questions. It does not approve a door, track, springs or opener for your building; the supplier and qualified site review must confirm the exact assembly, supports and obstructions against its drawing.

Take only measurements you can safely make from the floor, away from moving parts. Have a qualified technician check overhead spaces or anything near springs, cables or a door that could move. Do not operate a damaged door to measure it.

## 1. The opening

| Item | Your measurement |
|---|---|
| Opening width | ______ ft ______ in |
| Opening height (floor to underside of header) | ______ ft ______ in |
| Door height, if a door is already chosen | ______ ft ______ in |

## 2. Space around the opening

| Item | Your measurement | What's in the way? |
|---|---|---|
| Headroom at the header (top of opening to lowest obstruction) | ______ in | beam / duct / pipe / light / sprinkler / heater / other: ______ |
| Headroom along the track path (lowest point, measured back into the building) | ______ in | ______ |
| Sideroom, left side | ______ in | ______ |
| Sideroom, right side | ______ in | ______ |
| Backroom (opening to first obstruction, straight back) | ______ ft ______ in | ______ |

Tip: measure to the lowest thing in the way, not the roof. A duct 6 ft behind the header can matter as much as one right above it.

## 3. What the quote should say

| Item | Answer |
|---|---|
| Door brand and model | ______ |
| Track size (2 in. / 3 in.) | ______ |
| Track radius (12 in. / 15 in. / other) | ______ |
| Lift type (standard / low headroom, springs front / low headroom, springs rear / high lift ___ in. / full vertical / roof pitch) | ______ |
| Spring location and any door-weight limit printed for that layout | ______ |
| Opener type (trolley / jackshaft / chain hoist / none) and where it mounts | ______ |
| Extra headroom, sideroom or backroom the opener needs (from the opener or door maker) | ______ |
| Clearance drawing for this exact door, track and opener (ask for a copy) | received: yes / no |

| Source date, drawing revision and whether a later document supersedes it | ______ |
| Are door height and opening height recorded separately? | yes / no |

## 4. Questions to ask

1. Which brand's chart or drawing are these clearances from?
2. Do the headroom and backroom figures include the opener?
3. Does the door's weight fit the limit for this spring layout?
4. If headroom is tight, what does low-headroom track cost me in backroom?
5. If an obstruction has to move (pipe, light, sprinkler), who handles it?

## Why brands differ

Published minimums for the same named source-page category differ by brand: for 2-inch low-headroom track with rear springs, five brands publish 4 to 8 inches. Compare your numbers to the chart for the door you're actually buying.

Source data and method: https://uptimedockanddoor.com/research/commercial-garage-door-headroom-chart/

Do not treat an unstated clearance as zero, a possible allowance as a confirmed total, or a chart from another brand as a matching specification. Source checks: September 29, 2026.