In the O-Calc Master catalog, there are a variety of span types of varying sizes and specifications. However, there may be a situation in which a wire is not included in this catalog. To accurately model a cable that is not included in a catalog, it is possible to adjust a few key attributes of an existing span, to reflect specifications of the span you wish to model. These specifications must be obtained from the manufacturer.
Below is an example of specifications to be modified.
Example of Manufacturer Specifications
A table like this would show the specifications for a given type of wire. In this example, a user could start with the ACSR 4 AWG 6/1 SWAN from the master catalog by adding it to the 3D Model. The attributes of this wire from the master catalog can be viewed in the Data Entry Window.
Original Attributes to be Changed
This Data entry window shows the attributes of our original ACSR 4 AWG 6/1 SWAN span. We can modify these attributes using our data table provided by the manufacturer using the following steps:
Change the Rated Strength (lbs) from the original value to 1770, from the table.
Change the Span Diameter (in) from the original value to the value shown for Cable O.D. (Mils). A conversion must be done to the correct unit (Formula: mils = 1000d, where d is diameter in inches) = value is 0.41 in.
Change the Span Weight (lbs/ft) from the original value to the value shown for weight per 1000 ft, depending on whether or not XLP or HD Poly is being used **note: when adjusting the other two values, span weight adjusts automatically – can just verify that it is correct after converting from weight in lbs per 1000 ft to lbs/ft. **