▁ 1 2 5 ▁meter ▁tower ▁height . ▁A ▁tower ▁profile ▁made ▁of ▁connected ▁shell s ▁rather ▁than ▁cyl ind ers ▁can ▁have ▁a ▁larger ▁diameter ▁and ▁still ▁be ▁transport able . ▁A ▁ 1 0 0 ▁m ▁prototype ▁tower ▁with ▁T C ▁bol ted ▁ 1 8   mm ▁' pl ank ' ▁shell s ▁has ▁been ▁ere cted ▁at ▁the ▁wind ▁tur bine ▁test ▁center ▁H ø vs ø re ▁in ▁Den mark ▁and ▁cert ified ▁by ▁Det ▁N ors ke ▁Ver itas , ▁with ▁a ▁S iem ens ▁nac elle . ▁Sh ell ▁elements ▁can ▁be ▁sh ipped ▁in ▁standard ▁ 1 2 ▁m ▁sh ipping ▁containers , ▁and ▁ 2 ½ ▁to wers ▁per ▁week ▁are ▁produced ▁this ▁way . ▁ ▁As ▁of ▁ 2 0 0 3 , ▁typical ▁modern ▁wind ▁tur bine ▁install ations ▁use ▁to wers ▁about ▁ 2 1 0   ft ▁( 6 5 ▁m ) ▁high . ▁Height ▁is ▁typically ▁limited ▁by ▁the ▁avail ability ▁of ▁c ran es . ▁This ▁has ▁led ▁to ▁a ▁variety ▁of ▁propos als ▁for ▁" partial ly ▁self - ere ct ing ▁wind ▁tur b ines " ▁that , ▁for ▁a ▁given ▁available ▁c rane , ▁allow ▁t aller ▁to wers ▁that ▁put ▁a ▁tur bine ▁in ▁stronger ▁and ▁stead ier ▁wind s , ▁and ▁" self - ere ct ing ▁wind ▁tur b ines " ▁that ▁can ▁be ▁installed ▁without ▁c ran es . ▁ ▁Tower ▁materials ▁▁ ▁Currently , ▁the ▁majority ▁of ▁wind ▁tur b