Ready to use once their driven into the ground,
just string your wires
Increased versatility compared to wood posts (lots
of built-in options for placement of wires, thanks to wire slots)
Better for grounding lightening strikes then
wood posts
No need for wire clips, staples, etc....
More efficient harvesting with mechanical
harvesters compared to wood posts (more fruit harvested with less
beater power of harvester, and less damage to costly vines)
More consistent quality then wood posts
In addition, for those concerned
with vineyard aesthetics,
nongalvanzed steel posts turn dark and look as natural
as wood posts
Things to consider
when selecting a steel vineyard post
When comparing steel posts, it is absolutely
critical that like comparisons be made with regards to steel
thicknesses AND grades of steel. Just as all wines
are not created equal, all steel posts are not created equal.
Steel
Gauges DO NOT MAKE COMPARISONS BASED
SIMPLY ON GIVEN STEEL GAUGES!
Many suppliers 'fudge' steel gauges in an attempt
to purposely mislead customers. When comparing the Mannwerks
steel post to other posts, be certain to push suppliers to
provide specifications as to the ACTUAL thickness (not theoretical)
of their posts that you would receive should you order their
post. Be certain to obtain specifications in inches. (ie .104
inches). Listed to the right are steel gauges and their appropriate
decimal equivalent:
GAUGE
MIN.
NOM.
MAX.
12 gauge
.0967
.1046
.1126
13 gauge
.0827
.0897
.0967
14 gauge
.0677
.0747
.0817
The Mannwerks steel posts ALWAYS measures well within
the ASTM tolerances provided above, usually falling on the thicker side
of the range of the quoted gauge.
While the actual steel gauge for any given post is important,
the grade of steel is another factor one should consider when choosing
a vineyard post.
Steel Grade
All Mannwerks steel posts are made from the highest quality
steel available for use as a vineyard post. All posts are made from 100%
US domestic C1018 high strength steel. All material is continuous cast
and silicone or aluminum killed. This process ensures that the steel has
a more consistent grain structure and chemistry. In addition, this process
inhibits the formation of internal imperfections, which can impact the
integrity of the stake. The more imperfections contained in the steel,
the higher the chance of failure when a given load is applied. All Mannwerks
steel posts contain a minimum yield strength of 50,000 PSI and minimum
tensile strength of 65,000 psi. No secondary or ungraded material is used
for the manufacture of the Mannwerks steel posts.>
SpecTrellising
strongly recommends the use of galvanized line posts for longevity.
Mannwerks® Vertical
Line Posts* 12 gauge Mannwerks Stake - The Ultimate in Metal Line Posts *The Mannwerks Vertical Line Post is
an insured patented product
12 Gauge Mannwerks Stake
The Ultimate Metal Line Post!
Hi-Strength Hot Rolled Steel
Minimum Tensile Strength: 65,000 PSI
Minimum Yield Point: 50,000 PSI
Choice of Gauges and Lengths
Alternating Slot Pattern Available
Steel Characteristics:
Hi-strength, hot rolled steel
Cold Formed
Minimum T/S: 65,000 psi
Minimum yield point: 50,000 psi
Design features:
Designed to be gentle on mechanical
harvesters
Extremely stable in soil
User friendly
Options:
12, 13 and 14 gauges with a wide
range of lengths.
G90 galvanizing
Choice of alternating wire slot
pattern or paired wire slot pattern (shown in photos)
ROLLED EDGES
MECHANICAL HARVESTER FRIENDLY
Pull
Test Performed on 12 and 13 gauge posts(SHOWN BELOW)
Ease of installation and use.
Ready to use, once driven into the ground,
simply install wires.
Eliminates the need for staples, wire clips,
etc.
“Built-in” wire slots (placed on
4” centers) provide for a versatile post with a lot of
ready-to-use options for placement of trellis wires.
Strong and long lasting.
Machine harvester friendly: The inherent built-in
flex of the post enables harvesters to harvest fruit more efficiently,
while rounded edgest protect harvest beater bars from damage.
Steel posts create a direct path to ground
for lightning, significantly reducing lightning damage to vines
Ability to install posts by hand, without a
costly hydraulic pounder.
Wire slots (shown previous page) are cut at
an angle to ensure complete control of trellis wires in flat
or undulating terrain.
Durability
Top Quality
Longevity
Mechanical Harvester
Friendly Rolled Edges
P U L L T E S T
All line post samples were 13 gauge x 8' stakes,
pulled at 24" below the top (48" above the ground) with 24"
of stake in the ground
Cal-Line Rolled Edge
"Top" Competitor
Mannwerks Grape Stake
No. of lbs.
Deflection
Deflection
Deflection
25
0"
1/2"
0"
50
1/4"
1"
1/4"
75
3/4"
1 1/2"
1/2"
100
1"
1 3/4"
3/4"
125
1 1/2"
2 1/4"
1 1/2"
150
2 1/4"
2 3/4"
1 3/4"
175
2 1/2"
FAIL
2"
200
3"
2 1/2"
225
FAIL
3"
250
3 1/2"
275
4 1/2"
300
5 5/8"
325
FAIL
3 5/8" PERM.
DISTORTION
3 3/4" PERM.
DISTORTION
3 1/2" PERM.
DISTORTION
NOTE: PULL TEST PERFORMED
IN THE SUMMER OF 2000. WE NOW USE AN IMPROVED WIRE SLOT THAT
SIGNIFICANTLY IMPROVES THE STRENGTH OF THE STAKE.
P U L L T E S T
All line post samples were
12 gauge x 8' stakes,
pulled at 24" below the top (48" above the ground) with 24"
of stake in the ground
12 ga. "Grande"-domestic
12 ga. "Grande"-import
No.
of
lbs.
Deflection
Deflection
25
1/2"
1/2"
50
1"
1"
75
1 5/8"
1 1/2"
100
2 1/4"
2"
125
2 5/8"
2 3/8"
150
3"
2 3/4"
175
3 1/2"
3 1/4"
200
FAIL @ 208 lbs.
3 3/4"
225
FAIL @ 220 lbs.
250
275
300
325
3" PERM.
DISTORTION
4 1/2 " PERM.
DISTORTION
NOTE:
AS INDICATED IN THE ABOVE TEST, THE 13 GAUGE MANNWERKS STAKE
IS SIGNIFICANTLY STRONGER THAN EVEN THE 12 GAUGE POSTS TESTED.
VinStake®
Extenders VinStake® installations to up-grade existing vineyards
Installing Vinstakes between existing posts to the new
required height
Vinstake drive-in extensions on existing wood posts
Vinstake trellis extensions bolted or TEC screwed to
existing wood posts
Vinstake trellis extensions for star type posts
Rib-Bak
U-Channel End Post
Engineered
for Strength Rib-Bak™ sign supports are engineered with
a patented ribbed back design - adding strength to crucial load-bearing
points.
4.0 LBS/FT
5.94 Kg/M
100% Recycled Steel
Rib-Bak™ is manufactured, top to bottom from the finest high-carbon
new billet steel (Grade SP-80: 80,000 PSI min. yield 100,000 PSI
min. tensile). Rib-Bak steel conforms to the mechanical requirements
of ASTM A-499 and the chemical requirements of ASTM A-1. Other u-channel
manufacturers reuse rail steel of domestic and foreign origin.
Fast, Easy Installation
Regardless of the method you chose, Rib-Bak™ installation is
quick, easy and inexpensive.
Installation in minutes (one or more trained installers)
No post hole digging required
Easily driven with conventional tools
Tapered ends upon request
3/8" holes on 1" centers
Colors & Finishes
Rib-Bak™ sign supports are available in green and black (Other
colors by request), with your choice of finishes:
Engineered
for Strength
