Client Date
Field(s)
Length(s)
Farm/Tract
Location
Planner County/SWCD
1. Management Objectives:
Additional Narrative:
2. Type of Fence (check all that apply):
Barbed Wire High Tensile Wire 3-Wir
e 4
-Wi
re 5
-Wir
e
W
oven Wire 26 inch 32 inch
Other
(Describe)
3. Additional Specifications:
Narrative:
See attached designs drawings and/or maps.
382A OR-Specification
Natural Resources Conservation Service, Oregon
February 2015
FENCE (standard wire) SPECIFICATION SHEET
4. CONSTRUCTION SPECIFICATIONS
fencing member does not exceed the maximum
GENERAL
fence member to soil surface spacing specified.
Installation s hall be in accordance with an approved
plan. Details of construction shown on the drawings
The fence materials shall have an expected life of at
but not include herein are considered as part of these
least 10 years with routine maintenance. All wood
specifications. Construction activities shall be in
materials except Orange Osage, Western Red
accordance with applicable OSHA regulations.
Cedar, Juniper and Black Locust that have contact
with the soil shall be treated with an EPA-registered
Prior to construction the fence lines shall be cleared
wood preservative. Wood posts shall be treated from
of any possible obstruction that would hinder the
the butt end of the post to distance of at least 30
fence placement and operation.
inches for line posts and 36 inches for all corner,
gate, and brace posts. Refer to Table 1 for the life
The soil surface along the fence line shall be
expectancy of treated versus untreated wood posts.
relatively smooth such that placement of the bottom
1 | P a ge
-
Table 1: Life Expectancy of Untreated and Treated
Fence Posts (Years)
Kind of Wood
Hot
Un Pressure and Cold
treated Treated Cold Soak
Bath
Western Red
Cedar
12-15 20-25 20-25 -
Lodgepole &
Ponderosa
Pine
2-4 20-25 15-20 10-20
Aspen or
Cottonwood
1-3 15-20 10-15 5-10
Douglas Fir
& Western
Hemlock
3-6 20-35 15-25 10-20
382A OR-Specification
Natural Resources Conservation Service, Oregon
February 2015
FENCE (standard wire) SPECIFICATION SHEET
MATERIALS
Wood Posts: Line posts shall have a minimum top
diameter of 3 inches and shall be a minimum of 6 feet
in length.
Corner, gate and brace posts shall have a
minimum top diameter of 5 inches and shall be a
minimum of 7 feet in length. Braces shall have a
minimum top diameter of 4 inches and shall be a
minimum of 6 feet in length.
Steel Posts:
Steel
line posts shall be the “T”, “U” or
“Y” type with a welded or riveted anchor plate near
the bottom (minimum 18 inches square area) and
have suitable corrugations,
knobs, studs or grooves
for fastening the wire. Line posts shall
weigh at least
1.33 pounds per linear foot
of length and shall be a
minimum of 5.5 feet long.
Steel Pipe Posts: Steel pipe corner, gate or brace
posts shall be a minimum diameter of 2 inches,
Schedule 40 (2.375-inch O.D.) and at
least
7 feet
long.
Bracing shall
be a minimum of 1-1/2 inch
nominal diameter, Schedule 40 Pipe.
Brace fittings
and clamps shall be galvanized.
Angle Section Posts:
Angle section posts shall have
nominal sectional dimensions of 2.5 by 2.5 by
0.25
inches thick and at
least 7 feet
in length.
Braces
shall be of the same size dimensions as corner and
gate posts and shall
be a minimum of 6 feet in length.
Woven Wire: Woven wire materials
shall conform to
ASTM A 116. The top and bottom wires shall be
zinc-coated, 11-gauge or heavier and the line and
stay wires shall be zinc-coated 14.5-gauge or
heavier.
Barbed Wire: Barbed wire shall be composed of two
strands of 12.5-gauge zinc coated wire wrapped
around each other, with 2-point 14 gauge barbs
spaced no more than 5 inches apart conforming to
ASTM A 121.
Smooth Wire: Smooth wire shall be a single steel
wire of 9-gauge or heavier, two wrapped strands of
12.5-gauge or heavier wire or 12.5-gauge or heavier
hi-tensile wire. Wire shall have a minimum tensile
strength of 45,000 psi.
Wire Panel Fasteners: Staples shall be 9-gauge or
heavier and have a minimum length of 1.5 inches,
except 1.0 inch staples are allowed on very hard
woods. Fasteners for use with steel posts shall be
12-gauge or heavier zinc coated wir
e.
S
tays: Wire stays shall be 9.5-gauge or heavier, zinc
coated, twisted wire. The length shall be at least two
inches longer than the distance between the top and
the bottom strands of the fence. Wood stays shall be
sound, straight pieces at least 2 inches in diameter.
INSTALLATION
The fence shall be reasonably straight and shall not
deviate more than 12 inches between any corner and
gate or line brace assembly.
Post Depth: Line steel posts shall be set a minimum
depth of 1.5 feet and wood line posts shall be set to a
minimum depth of 2 feet, unless otherwise specified.
Gate, corner and brace posts shall be set to a
minimum depth of 3 feet, unless otherwise specified.
Steel pipe and angle section posts shall be
embedded in a 12-inch circular or square concrete
pier, except when set in firm rock.
Post Spacing: The maximum post spacing interval
shall be 20 feet on fences without fence stays, 25
feet with one stay between posts and 30 feet with two
stays between posts.
Line Bracing: Line brace assemblies shall be
located at all corners, gates and abrupt changes in
vertical topography (generally considered as 15
degrees). On straight reaches of fencing line braces
shall be installed at a spacing of no more than 1300
feet.
2 | P a ge
Table 2: Barbed or High Tensile Wire Fence
Fence Type
Spacing Measured from Groundline
(inches)
3-wire 16 28 40
4-wire 14 22 30 42-45
5-wire 5 12 20 30 42-45
Table 3: Woven Wire/Barbed Wire(s)
Wire Description
Spacing Measured From
Groundline (inches)
26-inch woven Ground 26 32 42
32-inch woven Ground 32 42
a) 3-Barbed Wire or Smooth Wire Fence Details
b) 4-Barbed Wire or High Tensile Wire Fence Details
382A OR-Specification
Natural Resources Conservation Service, Oregon February 2015
FENCE (standard wire) SPECIFICATION SHEET
Wire Spacing: Wire spacings are as follows, unless
otherwise specified:
Note: Where the movement of antelope is a concern, the
minimum height of the bottom wire shall be at least
16 inches from the groundline and the wire may be
smooth.
Note: Oregon Department of Fish and Wildlife
recommends maximum fence heights of 42 inches
where wildlife crossings are a concern.
Antelope crossings shall be provided if sheep-tight fences
are built.
Wire Fasteners: Staples shall be driven diagonally
into the wood grain of the post. Space shall be left
between the post and the staple to allow movement
of the wire. Fasteners on steel posts shall be snug
enough to prevent vertical movement of the wire on
the post.
Stays: Stays shall be uniformly spaced between the
posts as required for the specified post spacing.
Drainageways: In crossing drainageways or
depressions a weight or deadman anchor shall be
fastened to the fence to maintain the required
spacing interval or additional wires shall be added to
maintain the required minimum wire height from the
groundline.
3 | P a ge
c) 5-Barbed Wire or Smooth Wire Fence Details
d) Let-Down Fence Details
e) Barbed Wire or Smooth Wire Line Brace Details
f) Woven Wire Fence Details
382A OR-Specification
Natural Resources Conservation Service, Oregon
February 2015
FENCE (standard wire) SPECIFICATION SHEET
4 | P a ge
5. Operation and Maintenance:
Additional Narrative:
382A OR-Specification
Natural Resources Conservation Service, Oregon
February 2015
FENCE (standard wire) SPECIFICATION SHEET
5 | P a ge
Regular inspection of fences should be part of an
ongoing maintenance program to ensure continuing
proper function of the fence.
Operation and Maintenance (O&M) includes the
following:
A schedule for regular inspections and after
storms and other disturbance events.
Maintenance activities:
• Repair or replacement of loose or broken
material, gates, and other forms of ingress/egress
Removal of trees/limbs
• Replacement of water gaps as necessary
• Repair of eroded areas as necessary
• Repair or replacement of markers or other
safety and control features as required.
1B
2B
3B
Practice
Job Class
Lead
Code Practice Controlling Factor Units
Discipline
I II III IV V
No.
4B
BCSD Graz Land
382
0B
Fence
Length Feet All All All All All
Spec
Animal Units AUE 25 100 250 350 All
This practice is classified as Job Class (check one):
Design Approved By: /s/ Date:
Job Title:
Clients Acknowledgement Statement:
The Client acknowledges that:
a. They have received a copy of the specification and understand the contents and requirements.
b. It shall be the responsibility of the client to obtain all necessary permits and/or rights, and to comply with all
ordinances and laws pertaining to the application of this practice.
Accepted By: /s/ Date:
Certification:
I have completed a review of the information provided by the client and certify this practice has been applied as
specified.
Certification By: /s/ Date:
Job Title:
Refer to the Following Conservation Practice Specifications []
Access Control 472 Prescribed Grazing 528
Range Planting 550 Critical Area Planting 342
Pipeline 516 Watering Facility 614
Spring Development 574 Wetland Wildlife Habitat Management 644
Upland Wildlife Habitat Management 645 Other:
Design Approval:
382A OR-Specification
Natural Resources Conservation Service, Oregon
February 2015
FENCE (standard wire) SPECIFICATION SHEET
USDA Nondiscrimination Statement
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, sex, religion, age,
disability, political beliefs, sexual orientation, and marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require
alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at 202-720-2600 (voice
and TDD).
To file a complaint of discrimination write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 14th and Independence Avenue, SW, Washington,
DC 20250-9410 or call 202-720-5964 (voice or TDD). USDA is an equal opportunity provider and employer.
6 | P a ge