The most important factor in building a safe and steady concrete straetare is having a durable formwork system that contenius on-third of the wholecost. If concrete structure been noticed . economicaly as an permanent tools and long lasting capital all the efforus for maintain and impie menting it would be inevitable.  [SF_Alyazh] has turned to one of most reliable inelustries by efforts of young educated and creative experts and its estublished in 1382 and has tendedto do its best with modern equipments.