You can specify the tower type, the number of each type of installed equipment, and the allocated members in the individual categories under General Data. The members of lattice towers previously defined in the RF-/TOWER Structure and/or RF-/TOWER Equipment add-on modules are allocated automatically.
![Dlubal Center | Blocks](/en/webimage/028609/3237291/1_en.png?mw=512&hash=fd421b3f2c85d04e163841c3e5995f948391dd20)
![Creating Cross-Sections](/en/webimage/008719/1979290/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![Defining Nodes 1 to 4](/en/webimage/008816/769085/01-en.png?mw=512&hash=65e98cfe859ce35a3e3e9da47a0ef9335401520e)
![2.1 Effective Lengths - Truss Members](/en/webimage/007036/1590022/000280-en-png-png.png?mw=512&hash=69021112f394ffcd1320fcf7598e68a868b98df3)
After generating the effective lengths, the results are displayed in clearly arranged tables. You can modify the effective lengths manually there.
The Export function transfers the effective lengths to the RF-/TOWER Design add-on module for further calculation. The complete module data are part of the RFEM/RSTAB printout report. The report contents and the extent of the results can be selected specifically for the individual designs.
![Detail Settings](/en/webimage/007035/1590000/000279-en-png.png?mw=512&hash=e5874f08bae1bb1ff58f4242de959e59f0c560e8)
In the Details dialog box, you can specify nodal restraints of the individual bracing types. For example, intersection points of horizontal and vertical bracings can be defined as being kept perpendicular to the bracing plane.
![1.1 General Data](/en/webimage/007034/1589983/000278-en-png.png?mw=512&hash=2442636518d99c89720ebfd5dd47c43cfc9e1f78)
You can specify the tower type, the number of each type of installed equipment, and the allocated members in the individual categories under General Data. The members of lattice towers previously defined in the RF-/TOWER Structure and/or RF-/TOWER Equipment add-on modules are allocated automatically.
![RF-/TOWER Effective Lengths Add-on Module for RFEM/RSTAB | Determination of Effective Lengths for Lattice Towers](/en/webimage/002853/2990138/172_Mast_(C)Dlubal_KohlA_(2).png?mw=512&hash=1f7c1e1893af02f91233a54ea7508b6472041bf1)
- Determination of effective lengths for lattice tower members created in RFEM/RSTAB or RF-/TOWER Structure and RF-/TOWER Equipment
- Options to consider nodal restraints of various bracings