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# How to calculate Wind load and Ice load of a custom equipment in PLS-POLE

## How to calculate Wind load and Ice load of a custom equipment in PLS-POLE

(OP)
Hello everyone,

I have been doing pole audit on electric distribution poles (Wooden - Southern Pine). As a part of it, I need to build poles in PLS-POLE which will be later used in PLS-CADD for structural loading and clearances. Recently I came across equipment such as capacitors, voltage regulators on poles which weigh more than 250 lbs at a height of around 25 - 30 feet from ground. I am pretty sure, this kind of equipment would impose considerable amount of moment on the pole. When I am trying to create such equipment in PLS-POLE, I was asked for Wind load & Ice load on the equipment. Does anyone have any idea or references to calculate the Wind & Ice loads on equipments with customized geometry.

Rohit

### RE: How to calculate Wind load and Ice load of a custom equipment in PLS-POLE

Rohit,
When I am creating equipment in PLS Pole, it doesn't ask me for the load, in particular, but rather for the wind and ice area. The wind area would be the cross sectional area of the equipment in the Z-Y or Z-X plane. The ice area would be the cross sectional area of the equipment in the X-Y plane (i.e. looking straight down). If it is asking for the actual ice and wind load, just multiply the wind pressure (psf) by the wind area (or the ice density by the ice area and ice thickness).

### RE: How to calculate Wind load and Ice load of a custom equipment in PLS-POLE

(OP)
I apologize, I should have asked for wind and ice area instead of load, and this is what exactly I am looking for.

Thank you very much bhyde.

Rohit63:

### RE: How to calculate Wind load and Ice load of a custom equipment in PLS-POLE

The equipment input into PLS-POLE can include the shape factor, wind area, ice area, and the weight. The PLS-CADD program criteria file determines the wind velocity (it is your input value). The USA electric utility industry does not include the ice weight and area on the structures. We do apply ice on the wires as required in the NESC, but the structures are not required to have it. When you put the equipment on the pole, you can specify the azimuth and the offset from the face of the pole. The program will take into account any P-Delta effects when you do a non-linear analysis.

As dhengr already said, our industry is a very specialized branch of structural engineering and it uses very specialized software and you can get into trouble quickly if you do not understand what the program is telling you.

_____________________________________
I have been called "A storehouse of worthless information" many times.

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