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Shipping
and moving boxes are made of a paper material called "corrugated"
or "corrugated paper". A cross section of some corrugated
is shown.
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This picture represents a material called "single wall
corrugated". The vast majority of all boxes are made of single wall
corrugated.
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This picture shows a material called "doublewall
corrugated" which is usually much stronger than the "singlewall" material described above.
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Strength of single wall corrugated (or double wall) varies a lot depending
on the materials used in construction. There also exists "triplewall corrugated". This material is
frequently designed to meet military specs. It is usually treated for
extreme strength and moisture resistance. This makes it incredibly strong
and incredibly expensive. If you feel you need triple wall strength,
it might be easier to purchase crates, instead.
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Flutes is a sheet of
corrugating medium that is shaped into a continuous rolling wave.
Observed vertically, they form a row of columns, basically a structure
form capable of supporting great weight.
Viewed horizontally, the flutes are arches. Flutes serve as protective
cushioning and helps strengthen a carton
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Flute Structures
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Name
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Flutes Per Linear
Foot
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Approximate Height
(Exc. facings)
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Picture
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A-Flute
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33 +/- 3
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4.7 mm (3/16")
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B-Flute
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47 +/- 3
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2.5 mm
(3/32")
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C-Flute
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39 +/- 3
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3.6 mm
(9/64")
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E-Flute
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90 +/- 3
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1.5 mm
(3/64")
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