Bentley MSTower

(Last Updated On: December 1, 2017)

Bentley MSTower

MStower V6 is a Windows program for the analysis and checking of latticed towers and masts. It is used by designers and authorities for the checking of transmission line structures and communications towers and masts.

The program has options for the generation of geometry and loading, analysis, application of gust factors to member forces, and checking of members. There are comprehensive facilities for plotting of the structure, loading, and results. The structure geometry is specified by data describing panels, dimensions, sections, and ancillary equipment. Section properties and ancillary data are taken from standard library files. Wind and ice loads on members, antennas, and ancillaries are computed automatically.

Loads may be computed according to the rules of:

  • BS 8100:Part 1:1986 (towers)
  • BS8100:Part 4:1995 (guyed masts)
  • ANSI EIA/TIA-222-F-1996
  • ANSI/TIA-222-G-2005
  • AS3995-1994
  • AS/NZS 1170.2:2011
  • Malaysian Electricity Supply Regulations 1990

Alternatively, any user-defined wind velocity profile may be used. Patch loading may be computed for masts.

Ancillaries are shown on the screen and each may be interrogated by clicking on it.


Member forces are extracted directly from the analysis results. Non-linear analysis is used formasts and a catenary cable element is used for the guys.

Tower members may be checked using the rules of:

  • BS8100:Part 3:1997
  • BS449:1990 (allowable stress)
  • AS 3995-1994
  • ANSI 10-90
  • ANSI 10-97
  • EIA/TIA-222-F. 1996 (allowable stress)
  • ANSI/TIA-222-G-2005

Analysis results and member check results may be displayed graphically and reports may be displayed and printed as required. An important application of MStower is the reassessment of existing structures subjected to modified loading. For example, increased loading may result from the installation of additional ancillary equipment or conductors. MStower is also useful for checking serviceability requirements. A special report gives both tower reactions and angular displacements of ancillaries under wind loading.



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