Per NMDOT 2019 606.2.1.4.1, wood offset blocks shall have a stress grade of at least which value, and what size tolerance is allowed in the bolt-hole direction for rough-sawn blocks?

1. 600 psi, with a ±1 inch size tolerance
2. 2,400 psi, with no size tolerance allowed
3. 800 psi, with a ±2 inch size tolerance
4. 1,200 psi, with a ±1/4 inch size tolerance