![]() ![]() Therefore, it is important to identify your requirements and select the appropriate plywood thickness for your application. That means it doesn’t expand and contract as much with changes in temperature and humidity. The grain of each layer runs in a different direction, so the plywood is much more stable than solid wood. That’s because plywood is made of layers of wood veneer glued together. When cutting plywood on a CNC router or a laser cutter, the specification of your machine determines the optimal thickness of the plywood. No, you don’t have to worry about expansion and contraction with plywood. However, if the application demands prolonged distance between the supports, it is advised to use thicker plywood with more number of plies to provide greater strength. Lay a Thin Layer of Underlay or Roofing Sheets 1.5 5. Increasing the distance between the supports will lead to buckling of the plywood and eventually cracking under the action of the load. This can be understood from the example that, when using a 3/4" thick plywood, with support elements separated by a distance of 24", the plywood sheet can easily take up a load of a grown man's weight. ![]() A plywood sheet is the strongest along this axis.Īpart from that, the distance between the supports also plays an important role in determining the optimal plywood thickness. The strength axis of the plywood runs parallel to the direction of the grains of the face and back veneers of the plywood. Although both provide the same thickness, the plywood with more plies provides greater strength and rigidity.įurthermore, aligning the strength axis of the plywood with the direction of load ensures high load-bearing capability with minimal thickness. ![]() Generally, the thickness requirement of the plywood depends upon the number of plies, the strength axis, and the available support to the plywood.ġ/4" thick plywood can be available in 3-ply and 5-ply options. The optimal plywood thickness mainly depends upon the dimensional requirements of the project and the type of application. ![]()
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