860Lumber and Timber

860.1General Description

This section includes the requirements for lumber and timber. 860.1.01 Related References

American Softwood Lumber Standard PS 20-70, US Department of Commerce or the National Hardwood Association ASTM D 245

860.2Materials

For the definition and limitations of defects, use the current manufacturing association grade rules applicable for the species specified. 860.2.01 Lumber and Timber

Saw or finish all lumber and timber as specified from the plants listed in QPL 50. Grades Use grade rules from an agency that follows the basic provisions of American Softwood Lumber Standard PS 20-70, US Department of Commerce or the National Hardwood Association.

as directed by the Engineer.

forms.

Uses Refer to Table 1 below for the working stress requirements for various structural uses of lumber and timber.

of grading rules for the indicated stress, developed from the ASTM D 245, Methods for Establishing Structural Grades of Lumber.

meet the stress requirements under rules developed from ASTM D 245.

Seasoning and Preservation: Season and treat according to the requirements of Section 863, except use an assay zone for marine lumber timber of .01 to 1 in. (0.25 to 25 mm)

The Department will accept the material based on inspection certification or on the results of tests conducted by the Department.

General Provisions 101 through 150. 1633 1633 1633