||Corrugated boxes are specified by their Length, Width, and Depth. For all
shipping boxes such as Regular Slotted Containers (RSC's), Mailers,
Garment Boxes, and Variable Depth Folders, the dimensions listed are the inside
dimensions of the empty box. Box measurements are given in the following
sequence: length, width and depth. The length and width
are the opening of the box. The depth is how far you can reach into the box.
|The dimensions are defined in relation to the open face of a
box; the longer side of the opening is the length, the shorter side
is the width, and the side that runs perpendicular to the two is the
depth. To ensure a proper fit for the product going inside the
box, you take measurements from the inside dimensions of the box.
In order to yield the correct inner dimensions for a box, the
thickness of the corrugated sheet must be taken into account when
figuring out where to place the scores. Those adjustments that you
make are referred to as scoring allowances.
Theoretically, the score made on the surface of the corrugated sheet
(1) will penetrate to the middle of the sheet when the sheet is
folded (2). This means half the thickness of the corrugated sheet
hangs to the inside of the box, effectively reducing the inside
dimensions by that amount
Closing the box reduces the inside dimensions further. In this case,
count on the dimensions being reduced by the entire amount of the
thickness of the inner flaps.
|TABLE OF SCORING ALLOWANCES
Different paper grades and carton styles (i.e., RSC, FOL, etc) call
for different algorithms for determining how much of an allowance to
leave. You can obtain allowances from an allowance table like this
one (this one would be used for an RSC). If you subtract the
allowances from the score-to-score dimensions, the net dimensions
should match the dimensions that you specified on your order.
When ordering corrugated boxes, you'll also find there's a slight
variation in size from box to box. This is not an indication of
sloppy manufacturing; rather, it's a result of several unpredictable
The corrugated industry commits to a manufacturing tolerance of
+/- 1/16", which gives a total range of 1/8" variation.
Container / Corrugated Styles