Tread width1 m
38.5Guitar picks
500,000E. coli bacteria
Photo from Wikimedia Commons
Escalator Step
A single grooved tread in the endless moving staircase/Everyday Objects
Each escalator step is a die-cast aluminum tread riding on a chain loop driven by an electric motor. The grooved (cleated) surface interlocks with the comb plate at each landing to prevent objects from getting caught. A typical escalator has 80 to 120 visible steps at any given time.
Measurements
Tread depth4 tenths m
889 millionthsVatican City widths
4.4 thousandthsAmerican football fields
Step rise height2 tenths m
2,667Human hair widths
16.7USB plug widths
1.7 tenthsSki pole lengths
Step mass10 kg
10,000Paperclips
10 millionGrains of sand
1.5 tenthsCouches
Cleat groove depth5 thousandths m
455 millionthsLondon double-decker buses
909 millionthsParking space lengths
34.1 millionthsGreat Pyramid heights
Travel speed5 tenths m/s
4.8 hundredthsUsain Bolts
417 millionFingernail growths
1.7 tenthsRunning toddlers