For purposes of enforcing the provisions of this chapter listed in section 71-1701, and of titles 17 through 21 inclusive of this article, all persons having the control, charge or custody of any public structure, work or ground, or of any plan, description, outline, drawing or chart thereof or relating thereto, made, kept or controlled by or under any public authority, shall permit and facilitate the examination, inspection and copying thereof by the commissioner, or by any person authorized by him to make such examination or inspection of such copies.