General guidance on fiberboard cases for home trade use
  Edge Crush* (kN/m) Burst*
(kPa)		 Total Grammage** (gsm) Mass Contents** (kg)
Single wall
(B or C flute)		 2.5 350 390 <5
3.0 550 400 5
3.5 660 450 10
4.5 880 550 15
5.5 1080 650 20
6.5 1270 750 30
Double wall
(BC flute)		 4.5 810 675 15
5.2 910 725 20
6.5 1110 825 30
8.0 1470 1025 40

 

 *minimum value / **nominal value
Minimum Flat Crush Resisitance B flute = 180kPa, C flute = 165kPa
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