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Why use Metal Vineyard Posts??
  1. Ease of installation compared to wood posts
  2. Ease of use compared to wood posts
  3. Ready to use once their driven into the ground, just string your wires
  4. Increased versatility compared to wood posts (lots of built-in options for placement of wires, thanks to wire slots)
  5. Better for grounding lightening strikes then wood posts
  6. No need for wire clips, staples, etc....
  7. 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)
  8. 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.
 
 
   
Metal to Wood Comparison
Mannwerks® Vertical Line Posts
VinStake® Extenders
Rib-Bak U-Channel End Post
 
Spec Trellising
 

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.

 
 
 
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