Guyed Tower

Guyed Tower

Guyed masts are popular telecommunications structures that are used to support antennas and other equipment when the allowable area is large and height is a requirement. These masts are typically tall, slender structures that can reach heights of more than 600 meters, making them ideal for applications such as radio and television broadcasting, cellular network infrastructure, and military communications.
Unlike self-supporting towers, which rely on their own structural integrity to remain stable, guyed masts rely on guy wires, which are tensioned cables anchored to the ground, to provide stability and support. This design allows for taller masts to be constructed using less material, making guyed masts a cost-effective solution for reaching very high elevations.
However, the design and construction of guyed masts can be complex due to the need for careful consideration of the loads, tensions, and foundations involved. The loads on a guyed mast include wind loads, which are a major factor in the design process. The tension in the guy wires is also critical, as it helps to balance the loads on the mast and ensure its stability.
To design a guyed mast, engineers must carefully analyze the loads and forces involved, as well as the characteristics of the soil and foundation. Advanced design software such as ASMTower can be used to create a 3D model of the mast and simulate its behavior under various loading conditions. This allows engineers to optimize the design for maximum safety, efficiency, and cost-effectiveness.

Guyed Tower Design Standards & Codes

ASMTower supports the design of guyed towers according to various industry standards, including :

  1. The American standard, with the latest addendums:
  • ANSI/TIA-222-G
  • ANSI/TIA-222-H
  1. The European standard EN1993-3-1 with the following national annexes:

 

 

General EN

 

EN 1991-1-4:2005

EN 1993-3-1:2006 CEN Annex

 

 

Cyprus

 

NA to CYS EN 1991.1.4:2005

NA to CYS EN 1993.3.1:2006(AC:2009)

 

 

Denmark

 

EN 1991.1.4 DK NA:2007

DS/EN 1993.3.1 DK NA :2013

 

 

France

 

NF EN 1991.1.4/NA/A1 Juillet 2011

NF EN 1993-3-1/NA2008-07

 

 

Germany

 

DIN EN 1991.1.4/NA:2008-9

DIN EN 1993.3.1:2010-12

 

 

Ireland

 

IS EN 1991-1-4:2005/NA:2013

NA:2010+A1:2020 to I.S. EN 1993-3-1:2006&AC:2009

 

 

Netherlands

 

NEN-EN 1991-1-4+A1+C2:2011/NB:2019+C1:2020

NEN-EN 1993-3-1:2007/NB:2012

 

 

Poland

 

PN-EN 1991.1.4 listopad 2008

PN-EN 1993.3.1 Listopad 2008

 

 

Romania

 

SR EN 1991.1.4:2006/NB:2007

GEN EN 1993.3.1 :2006

 

 

Singapore

 

NA to SS EN 1991.1.4:2009

GEN EN 1993.3.1 :2006

 

 

Sri Lanka

 

NA to SLS EN 1991.1.4:2019

GEN EN 1993.3.1 :2006

 

 

United Kingdom

 

BS EN 1991.1.4:2005+A1:2010

NA to BS EN 1993-3-1 :2006

Guyed Tower Torque Arm

In order to reduce the twisting of guyed masts, a torque arm is often provided as an additional support. A torque arm is a structural element that is attached to the mast and extends outwards to provide additional resistance to twisting forces. ASMTower provides a range of torque arm options to choose from, including:
      • Top and bottom chord inclined
      • Bottom chord flat
      • Upper chord flat
      • Cantilever types
Users can also define separate sections for the upper and bottom chords to customize the design of the torque arm based on the specific requirements of the project.
ASMTower is capable of designing the torque arm and its connection to the mast, taking into consideration the bending moment and other load factors. Users have the choice to use the torque arm on all faces of the tower or specific faces, depending on the design requirements.
The design of the torque arm is critical to the overall stability of the guyed mast, as it helps to prevent twisting and ensures that the mast can withstand the loads and forces involved. With the use of advanced software tools such as ASMTower, engineers can optimize the design of the torque arm and its connection to the mast for maximum safety and efficiency as the use of a torque arm is an important consideration in the design of guyed masts, and ASMTower provides the necessary tools to design and optimize this critical structural element.

Guyed Tower Analysis and design

One of the key features that sets ASMTower apart is its ability to model the guyed mast as a 3D truss, rather than just a virtual beam. This approach to modeling is the most accurate method for designing guyed masts, as it allows engineers to account for the complex forces and loads involved in the structure.
ASMTower models the guy wires as a catenary element, rather than just springs. This approach provides a more accurate representation of the way the wires behave under tension,
The catenary element takes into account the weight of the cable and the tension forces acting on it, as well as any external loads or forces which is critical for ensuring the stability and safety of the structure. By modeling the guy wires in this way, ASMTower can provide a more accurate prediction of the behavior of the guyed mast under different loading conditions, including wind loads and seismic forces.
The ability of ASMTower to model the guyed mast as a 3D truss and the guy wires as a catenary element is essential for ensuring the accuracy and reliability of the design.
By using this advanced modeling approach, engineers can optimize the design of the guyed mast for maximum safety and efficiency, while minimizing the material and construction costs.

Guy Wire Anchor

One of the key features of ASMTower is its ability to design the guy wire base connections and tower base connection which varies from each other.
ASMTower allows the user to model anchor bolts at the base and define arrangement and geometry of the bolts.
There are various types of anchor bolts that ASMTower supports, such as headed anchors, L-hooks, J-hooks, and deformed anchors. ASMTower performs a pull-out check and calculates the required embedded length based on the foundation reinforcement.

Guyed Tower Connection

ASMTower is a powerful software that enables the design of main leg splice, diagonal members, and horizontal members’ connections, taking into account single and double shear with bearing checks for the main leg, bracing, and gusset plate.

Additionally, ASMTower can model and analyze main leg flanged connections for pipe sections. In this type of connection, the software automatically calculates the additional forces in bolts due to prying forces and checks the adequacy of the flange thickness.

ASMTower Output

• ASMTower provides a detailed 3D view of the tower, including member, guy wires and appurtenances, allowing for easy checking of input data and reducing the risk of errors.
• The software also color members and wires based on their utilization ratio, helping users identify unsafe sections of the tower.
• Additionally ASMTower generates valuable charts and diagrams, such as deformation conditions, displacement, tilt and twist, and global bending moment and shear diagrams, with the ability to show deformed shapes at various wind directions and load combinations.
• Users can also generate comprehensive output reports in RTF format, with the ability to adjust report settings and select specific components to be included in the report.

Enjoy ASMTower tutorial videos.