Kisang Son, Wien Univ., Austria. 20th June 2017

Kisang Son, Wien Univ., Austria. 20th June 2017

Kisang Son, Wien Univ., Austria. 20th June 2017

Kisang Son, Wien Univ., Austria. 20th June 2017

tower crane without H-beam or guy wire, Wien Austria. 20th June 2017

tower crane without H-beam or guy wire, Wien Austria. 20th June 2017

scatffolding. safe passage. Wien Austria. 20th June 2017

scatffolding. safe passage. Wien Austria. 20th June 2017

scatffolding. safe passage. Wien Austria. 20th June 2017

scatffolding. safe passage. Wien Austria. 20th June 2017

scatffolding. safe passage. Wien Austria. 20th June 2017

scatffolding with a truss typebeam without a column. Wien Austria. 20th June 2017

scatffolding with a truss typebeam without a column. Wien Austria. 20th June 2017