ANALYSIS ANDDESIGN OFMASTS AND TOWERS

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ANALYSIS AND DESIGN OFMASTS AND TOWERSRAMBOLL IS RANKED AS THE NO. 1 DESIGN FIRMIN THE WORLD WITHIN ANALYSIS, DESIGN ANDCONSTRCUTION OF MASTS AND TOWERS

Today none of us can enjoy modernlife even for a single day withoutbeing able to communicate witheachothers or receiving informationfrom radio and TV. Nevertheless,very few of us recognize that thesemodern conveniences are literallysupported by masts and towersproperly designed, constructed andmaintained for that particularpurpose. This is what we do. We know that masts and towersare special structures

The analysis and design of mastsand towers require specialknowledge and experience,especially when it comes to guyedmasts." A guyed mast is one of themost complicated structures anengineer can be faced with" hasbeen said by many experts, and thespecial problems related to thesestructures are underlined by themany collapses over the years.The design bases for such antennasupporting structures aresometimes many and oftenmutually contradictory, and theoverall structural layout may have adramatic effect on the load on thestructure. The loads are mainlymeteorological from wind and iceand combination of these, and thedynamic nature of the wind has to

be taken into account as masts andtowers are sensitive to dynamicloads. Ramboll is ranked the no.1 designfirm globally by ENR

Ramboll has been heavily engagedin the analysis, design andconstruction of masts and towersever since the formation of thecompany in 1945. Today, we areranked as the no. 1 design companyglobally within this field by ENR. Around 25,000-30,000 masts,towers and poles all around theworld bear the stamp of Rambolldesign. Extensive engagement ininternational standardisation alongwith R&D ensures world-classdesigns.

Our designs build on 70 years ofexperience

Today, Ramboll's design philosophyis well-known in theglobal telecommunication industry.With a constant focus on reducingthe total site costs for our clients,our masts and towers have beenoptimised with regard to minimisingwind load, foundations, logisticsand installation time whilemaintaining high quality at all times.The experience gained from

inspections of masts and towersduring operation makes up animportant part of Ramboll’s designprocedures, including the carefuldetailing of vital components andconnections. One example is theguy tension systems which havebeen developed and improved overthe years.

We are trendsetters ininternational standards

Ramboll actively contributes tonational and internationalcommittees and working groupsconcerned with the development ofnew standards andrecommendations in the field ofmasts and towers. For instance,Ramboll is chairing the IASSTechnical Expert Group for Mastand Towers, the only global forumrelated to masts and towers, and isheavily involved in the developmentof the new Eurocode foratmospheric icing (EN 1991-1-9) andthe Eurocode on towers and masts(EN 1993:3-1). Through these engagementsRamboll is at the forefront of thedevelopment within analysis, designand construction of masts andtowers on the global scene.

Our masts and towers are tailorsuited to your needs

Our designs are produced byquality manufacturers in severalcountries, and we make sure thatthe structures are optimisedespecially for our clients' projectsand in high quality.Several of our costumers purchasethe specific optimised structuresdirectly from our partners or obtainthe right to have their masts andtowers produced at their preferredmanufacturers.

We develop our own analysis anddesign computer software

It has always been essential toRamboll to be in the very frontwithin the technology anddevelopment in the field of mastsand towers.Every day we develop and improveour computer programs for designand analysis of masts and towersresulting in probably the mostadvanced and sophisticatedcomputer package in the world forthis particular purpose. On the basis of the experiencegained through six decades,Ramboll has developed a computerprogram named MAINMAST. Thereis no doubt that MAINMAST is the

most advanced and accuratecomputer system for full dynamicanalyses of guyed masts. RamTower and iTower are alsoincluded in Ramboll suite ofcomputer programs.

iTower

iTower is a commercially availablesoftware package especiallydeveloped for analysis and designof self-supporting towers.Besides being a very effective andadvanced software tool for bothtransmission line towers andtelecommunication towers, iTower isuser friendly and has a series offeatures for various analyses.

RamTower

RamTower is a very effective andextremely user friendly program forthe design of lattice towers withtriangular or square cross-sectionsexposed to wind and ice loads.Several national and internationalcodes and standards for the designof towers are implemented inRamTower. Ramboll is a truly multidisciplinaryconsultancy

Being a multidisciplinaryengineering consultancy Ramboll

can undertake all engineeringservices and special analyses thatmay be needed within the field oftelecom infrastructures. For mastsand towers, this may involvegeotechnical evaluations anddesigns, electrical and powerevaluations and solutions,inspection during manufacturingand installation, etc. We can naturally also undertake theproject management of majorrollouts of network.

More information

For further information pleasecontactUlrik Stottrup-Andersen,Technical Director,Ramboll Wind & Towers+45 5161 6820usa@ramboll.dkwww.ramboll.com