Tear out

He's got a bunch of tearouts on the finished side. It's cheaper and easier to redo it than to patch it, but the job's unprofitable either way.

The heartwood gave consistently better results than the sapwood, in fact nearly all the tearouts and most of the rough cutting were found in the sapwood.

Tearout can also occur below the final depth of cut.

This slot is a hot zone for tearout because it creates an unsupported surface for the material being cut.

The tearout load is determined by the formula Pₑ - 2AFₓ

Note that computation of tearout strength becomes far more complicated if there are several rows of bolts on each side of the joint.

The block tearout (Figure 8) and net section fracture (Figure 9) of the brace failure modes in most cases have predicted values that are similar, which helps to explain why braces predicted to faile with block tearout of the brace frequently failed with net section facture of the brace.

Equation 1 and 2 are established to predict the ultimate bearing resistance of tearout failure and splitting failure, which shows satisfactory agreement with test results in Figure 9.