Dimensional Lumber

4x4 - Pressure-Treated Douglas Fir

A ground-contact 4×4 treated Douglas Fir post is a familiar choice for fences, gates, deck supports, signs, and landscape structures. Its CA-C .15 treatment is intended for ground-contact service. Stocked for in-store pickup; verify footing, fasteners, loading, and the required use category.

LOCAL PICKUP + JOBSITE DELIVERY

In Stock

Choose a verified size or option below and use its SKU when calling or ordering at the counter.

CALL TO CONFIRM

ORDERING INFORMATION

Choose the verified size or option. Use the SKU at the counter.

IN STOCK = ON HAND · QUICK ORDER = USUALLY 1–5 DAYS · CUSTOM ORDER = CONFIRM LEAD TIME

IN STOCK = ON HAND

QUICK ORDER = USUALLY 1–5 DAYS

CUSTOM ORDER = CONFIRM LEAD TIME

SIZE / OPTION

SKU

INVENTORY DESCRIPTION

STATUS

8′

9129

4X4-8 D.F. TREATED CA-C .15

In Stock

10′

9146

4X4-10' D.F. TREATED CA-C.15

In Stock

12′

9148

4 X 4 - 12 PRESSURE TREATED

In Stock

PRODUCT SPECIFICATIONS

COMMON SIZE

8′ | 10′

Additional sizes or options may be available.

MATERIAL

Pressure-Treated Douglas Fir · #2 & Better / CA-C .15 Ground Contact · Allweather Wood

Review the exact material, finish, grade, or treatment.

APPLICATION

General building use

Suitable detailing and local code still apply.

AVAILABILITY

In Stock

Stock and lengths change throughout the week.

BEFORE YOU BUILD

A few useful things to know

before this material leaves the yard.

A few useful things to know before this material leaves the yard.

01 / CONFIRM THE SPEC

Match nominal size, actual dimensions, grade, treatment, exposure, and intended use to the plans.

02 / VERIFY COMPATIBILITY

Confirm fasteners, connectors, adhesives, coatings, and local code requirements for the exact product.

03 / PLAN THE ORDER

Bring dimensions, spans, and finish goals when you call.

COMPLETE THE PROJECT

Compatible material, tools, and supplies.

SELECTED BY THE YARD FOR THIS PRODUCT

1/4 in x 3 in SDS Structural Screw available from Capital Lumber in Boise, Idaho

1/4" x 3" - SDS Structural Screw

Capital Lumber stocks 1/4" x 3" - sds structural screw in its Boise bulk-fastener department. Sold by the pound for construction and repair work. Confirm current bin inventory and suitability for the intended application before purchase.

2109

VIEW

Hangers & Brackets

Common repair quantities are stocked and ready in the yard. Commonly used for galvanized steel, interior & exterior grades. Galvanized steel construction for exterior-ready hardware applications.

YARD-REF-000

VIEW

Connectors

Common repair quantities are stocked and ready in the yard. Commonly used for simpson strong-tie hangers, post bases, straps. Galvanized steel construction for exterior-ready hardware applications.

YARD-REF-000

VIEW

Adhesives & Sealants

Common repair quantities are stocked and ready in the yard. Commonly used for liquid nails, titebond, dap. Polyurethane / Polymer specified for this product line.

YARD-REF-000

VIEW

NOT SURE WHAT FITS TOGETHER?

Call a material expert with the product reference in hand.

Tell us what you are building. We can confirm material, fasteners, tools, quantities, pickup, and delivery.

CALL THE YARD →