ANALYZE & RESULTS

The Analyze tab enables you to evaluate the loss of section modulus due to the pole damage and to select similar analyses to determine cross-sectional area and moment of inertia reductions.

After entering the pole measurements, ANSI classification (optional) and damage type(s) for one or more levels, click the Analyze button to evaluate the damage and view results. If, in addition to entering the actual field-measured dimensions of the pole, you entered a description of the pole using ANSI O5.1 dimensions, the results of a comparison of the damaged pole to an undamaged ANSI O5.1 minimum dimension pole will also be displayed.

Note: Shell Damage and Heart Damage are evaluated with 100% accuracy using closed form solutions. The other types of damage are evaluated using numerical integration techniques that are typically accurate to within plus or minus 3% of the true value. The accuracy of these techniques will decrease slightly when severe pole damage causes a reduction of 70% or more in the section modulus, moment of inertia, or area.

The analytical formulae for the in-line and transverse Moments of Inertia and Section Moduli are:

  • Ii, It = πd4/64
  • Si, St = πd3/32

When viewing the Results window, you can click view results for each level of damage:

  • Percent Remaining of Section Modulus, Moment of Inertia, and Area
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  • Actual Values of Section Modulus, Moment of Inertia, and Area
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  • Percent Strength remaining for Section Modulus, and remaining strength in psi
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    The strength equivalency function allows D-Calc 5 to calculate an equivalent material strength for the damaged pole based on an input strength. D-Calc™ estimates the reduced strength values by multiplying the strength you input by the percentage of remaining section modulus or area of the damaged pole, whichever you select. Results are displayed based on both the field-measured dimensions of the pole and damage, and a comparison of the damaged pole to an undamaged ANSI O5.1 minimum dimension pole (if the ANSI O5.1 information was entered).

    Note that D-Calc 5 allows you to calculate an equivalent material strength (in psi) for the damaged pole based on an input strength.

    After analyzing the results, they can be printed to pdf as shown in the print dialog below.

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