▁of ▁the ▁main ▁properties ▁of ▁cold ▁formed ▁steel ▁are ▁as ▁follows : ▁ ▁Light ness ▁in ▁weight ▁High ▁strength ▁and ▁st iff ness ▁E ase ▁of ▁pre fab ric ation ▁and ▁mass ▁production ▁Fast ▁and ▁easy ▁ere ction ▁and ▁installation ▁Sub st ant ial ▁elim ination ▁of ▁del ays ▁due ▁to ▁weather ▁More ▁accurate ▁detail ing ▁Non ▁shr inking ▁and ▁non ▁cre eping ▁at ▁ambient ▁temper atures ▁No ▁form work ▁needed ▁Term ite - proof ▁and ▁rot ▁proof ▁Un iform ▁quality ▁Econom y ▁in ▁transport ation ▁and ▁handling ▁Non ▁comb ust ibility ▁Rec y cl able ▁material ▁Pan els ▁and ▁de cks ▁can ▁provide ▁en closed ▁cells ▁for ▁condu its . ▁ ▁A ▁broad ▁classification ▁of ▁the ▁cold - formed ▁shapes ▁used ▁in ▁the ▁construction ▁industry ▁can ▁be ▁made ▁as ▁individual ▁struct ural ▁fr aming ▁members ▁or ▁pan els ▁and ▁de cks . ▁ ▁Some ▁of ▁the ▁popular ▁applications ▁and ▁the ▁preferred ▁sections ▁are : ▁ ▁Ro of ▁and ▁wall ▁systems ▁( indust rial , ▁commercial , ▁and ▁agricult ural ▁buildings ) ▁Ste el ▁ra cks ▁for ▁supporting ▁storage ▁pal lets ▁Struct ural ▁members ▁for ▁plane ▁and ▁space ▁tr uss es ▁F ram eless ▁Str essed ▁skin ▁structures : ▁Cor rug ated ▁sheets ▁or ▁sheet ing ▁profiles ▁with ▁st iff ened ▁edges ▁are ▁used ▁for ▁small ▁structures ▁up ▁to ▁a ▁ 3 0   ft ▁clear ▁span ▁with ▁no ▁interior ▁framework ▁ ▁The ▁A IS I ▁Spec ification ▁allows ▁the ▁use ▁of ▁steel ▁to ▁the ▁following ▁A ST M ▁specific ations ▁in ▁the