The taller bin adds 16 qt. IRIS USA's shared 19.7 x 15.75 in footprint has 30 qt at 7.75 in tall or 46 qt at 11.75 in.
The 60 and 74 qt bins share length, not width.
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Extra volume can come from height rather than shelf width
IRIS USA's WeatherPro 30 qt and 46 qt boxes both measure 19.7 in long by 15.75 in wide. Their heights differ: 7.75 in for the 30 qt box and 11.75 in for the 46 qt box. You can add volume within the same horizontal footprint if your shelf allows the extra height.
Capacities span 6.5 to 156 qt per bin. Use volume for the storage need and exterior dimensions for shelf fit, including the lid. The WeatherPro wheeled 103 qt box has an unlabelled dimension string, so its length, width and height remain unknown here; do not assign axes by guessing.
A latch count is not a stacking or sealing rating
IRIS USA Remington WeatherPro has 2 latches; the 30 qt and 46 qt WeatherPro boxes have 4. Known latch counts range from 2 to 6, but some packages have no supported count. More latches alone do not demonstrate a stronger seal, load limit or compatibility with another bin's lid.
Find out which lid and how many containers come in the selected package, then follow the maker's stacking instructions. Bin capacity, exterior size and latch details are compared on paper; no seal or stack-load trials show whether similar-footprint boxes interlock.
Before you buy
Do the outside sizes tell me the space inside?
They're IRIS USA's external dimensions, so the interior and the lid opening may be smaller, and no inside measurement is given. If you need something to fit snugly inside, allow for the wall and lid rim.
Is the quart figure for the whole 3 Pack?
It's per bin. The 16 qt and 60 qt bins come as 3 Packs on IRIS USA's pages, so a pack gives you three bins of that size; pick the pack on the maker's page before you order. The larger three-pack bin shares its 23.6 in length with the 74 qt, but it's 17.8 in wide and 11.2 in tall against 17.75 in and 14.5 in.
Why are the 103 qt wheeled bin's measurements blank?
Its page gives 23.63 x 17.75 x 18.75 Inches without saying which is length, width or height, so the finder keeps that string as written instead of guessing. That also means the bin can't count as a match once you pick a height or width.
Remington Heavy-Duty Storage Container WeatherPro® - 82 QT - Gasket BoxView at IRIS USA