Class 5 1, lb. Compression (psi). Tension (psi). Bending Capacity = k x fiber strength x C3 (ft-lb). Fiber Strength. Fiber Stress. Modulus of Rupture. ANSI O 4. ANSI. American National Standards Institute. 4 ANSI accredits the procedures of standards developing organizations. National ANSI O – Wood Poles. (ANSI) publishes such a standard: ANSI , Wood. Poles, Specifications, and Dimensions (2). Mem bers of ANSI Committee 05 periodically review and update .
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We strongly suggest that Annex A be read and understood but not necessarily agreed to before designing a wood pole structure under this standard.
As the load point is applied at lower heights, the maximum stress point moves lower on the pole. Please help us to share our service with your friends.
Please fill this form, we will try to respond as soon as possible. Your Alert Profile lists the documents that will be monitored. If the document is revised or amended, you will be notified by email. A Working Group has been formed within the Fiber Stress Subcommittee to anxi if there is strong evidence for changes that might result in less conservative or more precise designs.
Finally, the density of wood poles can vary greatly. If the maximum stress point is above ground, 051. the fiber stress per the height adjustment equation and use the minimum dimension at that height.
In some cases, the projected values were higher than the observed and in other cases lower. Add to Alert PDF. We need your help! This results in Douglas Fir poles having a density of 56 to 65 pcf, depending on the treatment process. Not only does the actual species of wood vary, but the moisture content, drying process, and treatment are all factors that can result in large density variations. The same pole unincised, groundline or full length standard incising treated with Penta or Copper Naphthenate in Oil or Creosote will weigh lbs.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
We have also provided a complete file ansi. This is the true material property.
ANSI O Wood Pole Specification Update – Free Download PDF
However, utilities use poles that are conditioned and treated before going into service. Therefore, a designer can calculate pole capacity safely and without pole actual dimensions. The factor varies for species and between different classes. The factors that adjusted the test values ranged from 1. This was important for pole installations where the maximum stress point is likely to occur above ground.
PLS-POLE ANSI Wood Pole Component Files
MAT file you can download below. Subscription pricing is determined by: A derivation of fiber stress values based on a combined data set of the ASTM distribution and EPRI transmission full-scale pole tests resulted in some changes in the standard.
Standards Subsctiption may be the perfect solution. Since the Table 1 values in the ANSI standard are supposed to be true groundline MORs, and since the earlier data on distribution poles closely represented a true groundline MOR, the transmission data had to be reported on a similar basis in order for the data to be combined as measurements of the same material property, the ani groundline MOR. Already Subscribed to this document.
The MOR will increase above groundline due to drying to equilibrium conditions as compared to test results of green poles.
This standard is also available to be included in Standards Subscriptions. Size px x x x x This standard is also available in these packages:. Fiber strength values, provided as a basis for determining pole class sizes, apply only to poles that meet or exceed the minimum quality specifications. As the voice of the U. Please first log in with a verified email before subscribing to alerts.
Applying the formula in Annex A in reverse to project a groundline stress from a known stress above ground is not how the formula was intended to be applied. Please first verify your email before subscribing to alerts. It is up to the engineer to determine what final density to use based on the treatment and other factors.
For poles that break above the groundline, it is important to note the difference between the theoretical projected fiber stress at the groundline and the observed groundline fiber stress. We have no amendments or corrections for this standard. This value is the fiber stress that was occurring at the groundline when the pole broke at a location above ground. No adjustment for variability 3. These files are being provided on an “as-is” basis.