Additional Info

Corrugated Board

Corrugated board has two main components, the linerboard and the medium. Linerboard is the flat pieces that make up both sides of the corrugated. Medium is the wavy, fluted paper in between the liners. The wavy flutes provide arches when horizontal and columns when vertical. The arches and columns help provide strength and support when holding heavy loads. The two primary types of combined linerboard that we use are Singlewall and Doublewall.


Combining two liners with one sheet of medium produces Singlewall. Double wall combines three liners and two sheets of medium.


How to Measure a Box

box-basics-measuringBox makers prefer the dimensions of a box to be expressed and measured as inside dimensions. Accurately measuring the inside of the box is very important to ensure that the proper fit is created. The dimensions are listed as Length x Width x Depth. The length is defined as the longer side of the opening. The width is the shorter side of the opening. The depth runs perpendicular to the length and width and is also the height of the carton.


Determining the best Edge Crush Test for your application

Determining the appropriate material grade is an important part of the design process. We can assist in developing the most effective and efficient material grade for your application.

The following chart provides us with the requirements of the National Motor Freight regulations:

Edge Crush Values:

Maximum Weight of Box & Contents (lbs.) Maximum Outside Dimensions: Length, Width and Depth Added (inches) Minimum Edge Crush Test
Single Wall Corrugated Fiberboard Boxes
20 40 23
35 50 26
50 60 29
65 75 32
80 85 40
95 95 44
120 105 55
Double Wall Corrugated Fiberboard Boxes
80 85 42
100 95 48
120 105 51
140 110 61
160 115 71
180 120 82