5. Conditions of use and diagrams for brackets

To meet needs in the most precise way, a media catalog should offer a choice that enables all cases of use to be dealt with, failing which it would be necessary to resort to media specially adapted to particular cases. On the other hand, to reduce costs, it is useful to reduce the number of different types of media, so as to increase the number of media to be ordered in each type.

• Standards for wood and concrete poles specify the various types, but users tend to select a preferred series of standardized types, limited to a small number of brackets that turn out to be the most widely used.

• Metal towers are classified into families that include a series of supports of increasing strength established for a basic armament and which can admit different armament variants (H _...