Definition
The maximum weight per unit area that an aircraft cabin or cargo compartment floor is structurally certified to support, typically expressed in pounds per square inch (psi) or pounds per square foot (psf). The limit is set by the aircraft manufacturer and is published in the aircraft's weight and balance or loading documentation.
Plain English
The most weight you're allowed to put on each small patch of the floor. Even if total cargo weight is within limits, no single area of the floor can be loaded more heavily than this number says.
Context Anchor
Seen in aircraft loading, weight-and-balance planning, cargo loading instructions, and aircraft manuals for airplanes that carry baggage, freight, or equipment.
Why Pilots Care
Exceeding the limit can damage the aircraft structure or cause floor failure during flight.
Analogy
A heavy person standing on a wide board spreads the weight out; the same person standing on one small heel puts much more force into one small spot. Floor load limit is about how concentrated the weight is on the aircraft floor.
Intuition Check
Do not read this as the aircraft’s total weight limit. Floor load limit is about how much weight the floor can support over a given area.
Example Sentence 1
Before loading the generator, the loadmaster checked the floor load limit and added a spreader board to distribute the weight over a larger area.
Example Sentence 2
Heavy equipment was spread out to stay within the floor load limit across the cabin.