Part 1 — General
1.1 Section Includes
A.Timber for signs, guardrails, and posts, and the preservative treatment for timber.
1.2 RELATED SECTIONS Not Used
1.3 References
A.AASHTO M 133: Preservatives and Pressure Treatment Processes for Timber
B.AASHTO M 168: Wood Products
C.Southern Pine Inspection Bureau (SPIB) Standard Grading Rules
D.Western Wood Products Association (WWPA) Standard Grading Rules
1.4 DEFINITIONS Not Used
1.5 Submittals
A.Manufacturer’s product data sheets and recommended installation instructions.
Part 2 — Products
2.1 Structural Timber and Lumber
A.Refer to AASHTO M 168.
B.Treat , if required , using preservative. Refer to AASHTO M 133.
2.2 Posts
A.Pressure treated w ood posts that comply with the current WWPA Standard Grading Rules or SPIB Grading Rules.
B.Temporary Use Sign Posts
1.Use only one type of wood species on any one project.
2.S4S, 80 percent FOHC, Douglas Fir-Larch, Grade No. 2 or better.
3.Hem -fir, Lodgepole Pine, Ponderosa Pine, or Southern Yellow Pine, Grade No. 1 or better.
C.Guardrail Post
1.Use only one species of wood on any one project.
2.Surfaced or rough- sawn posts and offset blocks.
3.Douglas Fir -Larch, Hem -Fir, Lodgepole Pine, Ponderosa Pine, or Southern Yellow Pine.
4.Grade No. 1 or better.
D.Steel Post with Wood Block
1.Routed wood offset block of Douglas Fir or Southern Yellow Pine.
2.Surfaced or rough sawn blocks.
3.Grade No. 1.
2.3 Treatment
A.Meet requirements of AASHTO M 133.
Part 3 — EXECUTION Not Used
Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 1180–1181 of 1,331.