4163.01 GENERAL REQUIREMENTS.
All rough or surfaced, treated timber and lumber furnished shall be new, unused material and shall meet requirements of Section 4162 for the size and lengths specified in the contract documents. In timber structures, the class of timber or lumber shall meet requirements of Section 4162 for use according to position in the structure.

Inspection arrangements shall be in accordance with Materials I.M. 462. The cost of inspection shall be included in the unit price bid for the material specified.

4163.02 SPECIES OF WOOD.
Only Douglas Fir (coast region), Northern Pine, and Southern Pine will be allowed for treatment.

Douglas Fir shall be incised before treatment in accordance with Article 4161.03, A.

On timber structures, all holes required in stringers, rail posts, post blocks, and scupper blocks shall be accurately bored before treatment wherever practicable.

4163.03 PRESERVATIVE TREATMENT.
Unless otherwise specified, all timber and lumber shall be given full pressure preservative treatment in accordance with Section 4161.