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 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