... short work cycle design, can doulbe shorten the construction time: completing 800 m2 of construction just in one day;4. Low cost ... be used for more than 50 years;6. Perfect design: Construction arch span is up to 70 m, which is a ... , grain storages, sports venues, workshops, railway stations, the extension project, and roof construction, etc. Needing more steel structure products, pls contact us ...