The interactive checker needs JavaScript. The formulas and worked example below can be used without it.
What to measure first
Measure from the floor to the ceiling, the top of the car including roof bars, and the highest point reached by any door part, track or opener in the proposed rack area throughout its movement. Include anything hanging below the rack in its drop.
How the calculation works
Rack underside = ceiling height − rack drop. Car gap = rack underside − car height. Door gap = rack underside − highest door travel height. A touching or overlapping envelope fails the check; a positive gap must also meet your chosen margin.
A worked example
A 2,600 mm ceiling with a 400 mm rack drop leaves its underside at 2200 mm. With a 1,600 mm car and door travel reaching 2,100 mm, the gaps are 600 mm above the car and 100 mm above the moving door. That meets the illustrative 100 mm margin. It does not confirm the structure can carry a rack.
What this cannot check
This is a dimension comparison, not a structural assessment. It cannot establish load capacity, fixing suitability, door shape, door swing, an escape route or whether you can manoeuvre through the entrance. No product catalogue is loaded: enter dimensions from the maker’s instructions for the exact item. A builder or competent installer should assess uncertain construction.
Read the fixings and load-rating guide before fitting storage.