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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MAT file you can download below. Conditioning Adjustment The test poles were not conditioned for treatment. Strength Of MaterialsMathematicsNature.

ANSI O Wood Pole Specification Update – Free Download PDF

Size px x x x x However, utilities use poles that are conditioned and treated before going into service. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.

Should you need to use one of these three materials you must determine the correct properties for your jurisdictions and incorporate them into your library.

In some cases, the projected values were higher than the observed and in other cases lower. Class Oversize Adjustment The class oversize is applied to the actual measured MOR calculated from the actual dimensions. The formula in Annex A was originally developed to account for a reduction in fiber stress at locations in the pole above ground.

PLS-POLE ANSI Wood Pole Components Page

ansl The fiber stress values needed to be re-evaluated based on consideration of the additional test data. However, consensus agreement was reached for the standard because the resulting designs are conservative in the vast majority of pole sizes.

This results in Douglas Fir poles having a density of 56 to 65 pcf, depending on the treatment process. 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 anwi similar basis in order for the data to be combined as measurements of the same material property, the actual groundline MOR.


PLS-POLE ANSI Wood Pole Component Files

If the maximum stress point is at the groundline, the pole capacity is based on the Table 1 fiber stress and minimum pole dimensions. These calculated pole capacities znsi a good correlation with the test data. We have no amendments or corrections for this standard. The poles described herein are considered as simple cantilever members subject to transverse loads only. Please first verify your email before subscribing to alerts.

This was 051 for pole installations where the maximum stress point is likely to occur above ground. These files are being provided on an “as-is” basis.

ANSI O5.1 Wood Pole Specification Update

Proceed to Checkout Continue Shopping. 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 strongly suggest that Annex A be read and understood before designing a wood pole structure under this standard. This is the true material property.

The same pole unincised, groundline or full length standard incising treated with Penta or Copper Naphthenate in Oil or Creosote will weigh lbs.

As the voice of the U. The factors that adjusted the test values ranged from 1.

Should you need to use one of these three materials, you must determine the correct properties ansj your jurisdictions and incorporate them into your library. Results and Application This derivation was found to result in a design ansii that has a good correlation with the test data see examples in Figures If the maximum stress point is above ground, adjust the fiber stress per the height adjustment equation and use the minimum dimension at that height.


Applying the formula in Annex A in reverse to project a groundline stress from a known stress above anai is not how the formula was intended to be anzi. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. A Working Group has been formed within the Fiber Stress Subcommittee to determine if there is strong evidence for changes that might result in less conservative or more precise designs.

You may delete a document from your Alert Profile at any time. This paper will provide an overview of the fiber stress derivation that was used to reevaluate the test data. As the load point is applied at lower heights, the maximum stress point moves lower on the pole. The derivation applied the formula in reverse in order to provide an estimate of actual groundline MOR, and if the resulting pole capacity correlated well with the test data, then designers would have a method to reliably project pole capacity.

The following factors adjusted the test data to account for the effects of conditioning during the treatment process.

Since all designs are based on the minimum dimensions, the design fiber stress value is multiplied by the oversize factor to account for the actual average oversize.