Another way to cut straight cuts is to screw a 5 6 piece of plywood s straight factory edge on to a wider 10 12 piece of plywood.
Cutting large plywood sheets.
Eliminating the need to remeasure.
But no matter where you choose to cut down your sheets it needs to be setting on some sacrificial scrap blocks.
Or if you prefer to cut on the ground that works too.
3 support the whole piece of wood.
Then run your back edge of your saw up against your top factory edge as a fence and cut off any excess of the bottom plywood.
When cutting a sheet of plywood it s important that you support the sheet on both sides of the cut.
The 2x4s will be sacrificed just a bit when the blade passes over them but that won t affect the quality of the cut.
Setting up plywood cutting station in order to cut down plywood it needs to be set up on something like a workbench or saw horses.
Now you can lay your cut line on the new piece of plywood you want to cut right on the cut line and clamp it.
The alternative is to cut it into small size using a circular saw.
The system works well for both rip cuts parallel to the grain and crosscuts perpendicular to the grain.
For circular saws grab a 15 20 carbide tip blade designed for plywood.
The large size and the weight of plywood also makes it difficult to cut a full sheet directly on the table saw.
For table and miter saws invest in an 80 tpi plywood blade one designed for cross miter saw or rip table saw cuts.