Rural and commercial wire fencing.
Specified and installed to hold tension.
Barbed Wire Fence Installation in Chehalis, WA
Licensed, Bonded & Insured Washington Contractor
—License #PNWFEFG779O7
Class 1 and Class 3
Galvanized Wire Systems
2-Year Craftsmanship
Warranty on All Installations
Most barbed wire fences fail at the corners. Ours don’t.
Barbed wire fencing fails for one reason almost every time—the corner brace assembly is wrong. When the brace fails, the wire loses tension, the posts lean, and the perimeter follows. In Lewis and Thurston County, it usually shows up within the first wet season.
PNW Fence & Gate specs the right gauge, strand count, and post system for the site—and builds corner assemblies that hold through PNW soil conditions.
What Barbed Wire Fencing Is Built to Do
- Define and secure rural property boundaries across large acreage
- Contain livestock with multi-strand wire tensioned to a correct post and brace system
- Mark agricultural boundaries and easements cost-effectively at scale
- Add deterrent capability to existing commercial perimeters as a standalone or top treatment
- Meet Washington State agricultural fencing requirements under RCW 16.60
- Hold up through PNW wet seasons with Class 3 galvanized wire and hardware
Barbed Wire Fence Applications in Lewis & Thurston County
Where gauge, strand count, post type, and brace assembly come together by use case.
Agricultural and Livestock Perimeter
Best for: cattle, horses, mixed livestock — Oakville, Toledo, Tenino, Rochester
4-strand, 12.5-gauge, Class 3 galvanized on wood posts. H-brace assemblies at corners and every 300 linear feet on long runs. Bottom strand smooth wire near wildlife corridors.
Rural Property Boundary
Best for: acreage lots, easement marking — Lewis County and south Thurston County
2 to 3-strand, 12.5-gauge, Class 3 galvanized. T-posts on straight runs, wood corner posts with H-brace assemblies at ends and corners.
Commercial Security Perimeter
Best for: industrial yards, utility areas, rural commercial properties
5 to 6-strand, 12.5-gauge, 4-point barb at 3-inch spacing, Class 3 galvanized. WAC municipal restrictions on barbed wire near public areas must be confirmed before installation.
Adding Barbed Wire to an Existing Fence
3-strand arms added to an existing chain-link fence at 45 degrees outward from the top rail—a cost-effective deterrent upgrade without replacing the existing perimeter.
Barbed Wire Fence Specifications
What gets specified before installation begins.
Wire Gauge
12.5-Gauge — Standard: The working standard for agricultural and rural perimeter fencing in Lewis County. Correct for most livestock and property boundary applications.
14-Gauge — Light-duty interior divisions and temporary cross-fencing only. Not for primary perimeter runs or high-load corner assemblies.
Strand Count
- 2-Strand — Property boundary marking
- 3-Strand — Light livestock containment with deterrent value
- 4-Strand — Standard agricultural perimeter—cattle, horses, mixed stock
- 5-Strand — High-security agricultural or commercial deterrent
- 6-Strand — Maximum security, industrial perimeter, steep terrain
Barb Style
2-Point Barb: Standard agricultural spec. Most common for Lewis County livestock and boundary fencing.
4-Point Barb: Greater deterrent value. Used on commercial security perimeters and high-security enclosures.
Barb Spacing
- 4-inch — Standard agricultural
- 5-inch — Light-duty and interior divisions
- 3-inch — Maximum security and commercial deterrent
Wire Coating
Class 1 Galvanized: ASTM minimum standard. Not recommended for Western Washington’s wet climate.
Class 3 Galvanized: Triple the zinc coating of Class 1. The correct spec for Lewis and Thurston County — 20–30+ year lifespan versus 10–15 for Class 1 in PNW conditions.
PVC-Coated over Galvanized: Additional corrosion resistance and visibility. Common on commercial and municipal projects.
Post Types
Wood Line Posts: Standard for rural and agricultural fencing. Treated Douglas fir or cedar, set at 10–12ft intervals on flat terrain, tighter on slopes and curves.
T-Posts (Steel Line Posts): Long straight runs where cost and speed are priorities. Carry tension only. All structural load remains in the corner and brace assembly.
Corner and Brace Posts: Wood posts sized for full perimeter tension load. Post diameter, depth, and brace type determine whether the fence holds through a PNW wet season.
Our Barbed Wire Fence Installation Process
Site Assessment and Specification
We assess terrain, soil conditions, perimeter length, and use case, then specify gauge, strand count, post type, and brace locations. Utility maps and 811 locates confirmed before digging. Permit review included where applicable.
Post Setting & Brace Assembly
Corner, end, and brace posts are set first in concrete footings for PNW soil. Line posts are set to the correct depth at the correct spacing. Brace assemblies are built and tensioned before the wire is run.
Wire Installation & Tensioning
Wire is run corner to corner, stapled to wood posts, clipped to T-posts, then tensioned with a mechanical stretcher. Inline strainers are installed on long runs. Bottom strand substituted with smooth wire near wildlife corridors.
Is Barbed Wire Fencing Right for Your Property?
| CONS | PROS |
|---|---|
| Not suitable for residential lots or urban settings—municipal restrictions apply | Not suitable for residential lots or urban settings—municipal restrictions apply |
| Requires correct corner brace assembly—improper installation fails fast | Requires correct corner brace assembly—improper installation fails fast |
| Liability exposure near public access areas if improperly installed or posted | Liability exposure near public access areas if improperly installed or posted |
| Not a privacy fence—open wire system with no visual screening | Not a privacy fence—open wire system with no visual screening |
| Wildlife hazard on the bottom strand near habitat corridors—smooth wire substitution recommended | Wildlife hazard on the bottom strand near habitat corridors—smooth wire substitution recommended |
Barbed Wire Fence Construction Standards
How the specified system gets installed correctly.
Corner Brace Assembly
The structural anchor of the entire fence line. Carries the full tension load of every strand on both runs meeting at the corner.
Types of Braces
H-Brace: Two vertical posts, one horizontal rail, one diagonal tension wire. The standard assembly for most agricultural and rural perimeter fencing. Diagonal wire direction is critical. Reversed installation significantly reduces brace strength.
N-Brace: Single diagonal post between two line posts. Less material, less load capacity. Suitable for short runs and interior divisions, not for primary corners on long perimeter runs in Lewis County’s shifting soil.
Double H-Brace: Two H-brace assemblies in series. Used on long runs, steep terrain, or corners carrying more than 300 linear feet of wire, so the perimeter doesn’t pull inward once tension is applied.
Post Spacing and Depth
- Line posts: 10–12ft on flat ground, 8ft on slopes, curves, and soft soil
- Embedment: minimum one-third of post length; deeper in Lewis County’s saturated clay soil to prevent leaning after the first wet winter.
- Corner and brace posts: set in concrete footings on permanent installations
- All post locations confirmed against utility maps and 811 locates before digging.
Wire
Tensioning
The wire is stretched with a mechanical stretcher. Inline strainers are installed on long runs to allow re-tensioning after the first wet season when posts shift, and wire settles.
Corrosion Management in PNW Conditions
Hardware (e.g., staples, clips, and tension wire) must match the wire coating. Mixed-metal hardware at contact points is the most common source of early rust on Lewis County barbed wire fencing.
Wildlife Consideration — Bottom Strand
WDFW guidance recommends smooth wire on the bottom strand near wildlife corridors. Deer and elk catch on barbed bottom strands when crossing. On Lewis County properties near wooded parcels and creek corridors east of Chehalis, this is standard practice confirmed during the site assessment.
Barbed Wire Fence Maintenance & Inspection Guide
- Walk the fence line once a year. Look for leaning posts, sagging wire, and failed staples. Catching tension loss early prevents the problem from spreading down the line.
- Re-tension after the first full wet season. PNW soil shifts as it saturates and dries. Wire settles, and posts move. Inline strainers allow re-tensioning without replacing wire or hardware.
- Inspect corner and brace assemblies annually. The brace diagonal tension wire is the first component to loosen. A loose brace transfers load to the line posts, and the whole perimeter follows.
- Clear vegetation from the fence line. Plant growth holds moisture against the wire and posts, adding weight that accelerates tension loss. Keep a clear corridor on both sides of the fence line.
- All installations are backed by a 2-year craftsmanship warranty covering wire tension, post alignment, and brace assembly integrity.
What Clients Say About PNW Fence & Gate
Why Property Owners Choose Us for Barbed Wire Fencing
Corner Assemblies Built to Hold
Right diagonal direction, correct post depth, concrete footings—built before a single strand of wire is run.
Materials Specified for the Site—Not the Lowest Bid
Correct spec for Lewis County’s wet climate. Mismatched hardware at staples and clips is the leading cause of early corrosion—we don’t cut that corner.
Rural and Agricultural Experience in Lewis County
Working farms and rural acreage across Oakville, Toledo, Tenino, and Rochester. PNW soil, terrain, and wildlife considerations are part of every site assessment.
Warranty-Backed, Code-Compliant Installations
2-year craftsmanship warranty. Built to Washington State legal fence standards under RCW 16.60. Licensed, bonded, and insured—License #PNWFEFG779O7.
Areas We Serve
PNW Fence & Gate installs barbed wire fencing throughout Lewis and Thurston Counties. Most barbed wire work is concentrated in the rural communities of Lewis County, where agricultural properties, large acreage lots, and rural boundary fencing are the norm.
Our service area includes Chehalis, Centralia, Oakville, Toledo, Tenino, Rochester, Napavine, Olympia, Yelm, and surrounding communities. For large-scale perimeter projects or properties beyond our standard service radius, contact us to confirm scope before the site estimate.
Need a Barbed Wire Fence That Holds Its Tension Through a Lewis County Winter?
Most barbed wire failures trace back to the corner assembly and the wrong wire coating. We spec and install both correctly—and back the work with a written warranty.
Schedule a Free On-Site Barbed Wire Estimate with PNW Fence & Gate or call (360) 996-4250.
Frequently Asked Questions
How many strands of barbed wire do I need?
Two to three strands mark a property boundary. Four strands are the standard for cattle and horses. Five to six strands are used for commercial security or high-security agricultural enclosures. Final strand count is confirmed during the site assessment based on livestock type, terrain, and security requirements.
Does barbed wire fencing require a permit in Lewis or Thurston County?
On rural agricultural land, permits are rarely required. Commercial applications and installations near roads or rights-of-way may require review under WAC and local municipal code. Chehalis and Olympia restrict the use of barbed wire near public-facing boundaries. We confirm permit requirements during the site assessment.
What is Washington State’s fence law under RCW 16.60?
RCW 16.60 defines what qualifies as a legal fence in Washington State. A legal fence must meet minimum standards—post spacing, strand count, and height—to protect a landowner from liability if livestock cross from an adjacent unfenced property. We account for these standards on every agricultural and rural installation.
Does barbed wire fencing affect wildlife in Lewis County?
Near wildlife corridors, barbed wire on the bottom strand is a hazard to deer and elk. WDFW recommends smooth wire on the lowest strand near wooded parcels and creek corridors. Lewis County properties east of Chehalis are in active movement zones—we confirm bottom-strand spec during every rural assessment.
How long does galvanized barbed wire last in Western Washington?
Class 3 galvanized wire lasts 20–30+ years in Western Washington. Class 1 typically lasts 10–15 years before corrosion becomes a problem. Treated wood posts set in concrete footings typically outlast T-posts in wet Lewis County soil conditions. Matched hardware at staples and clips prevents galvanic corrosion—the most common early failure point.
Can barbed wire be added to an existing fence?
Yes. Three-strand arms can be added to an existing chain-link fence at 45 degrees outward from the top rail—a cost-effective deterrent upgrade that does not require replacing the existing perimeter. Razor ribbon arms are available as a higher-security alternative.