Inquiry (采购产品): Industrial Spiral Staircase We are bidding on a contract for the design and fabrication of a spiral staircase for a silo. We have the design force but are looking for a fabricator. The silo is 14'-0" in diameter and 72'-0" high. it is carbon steel but it hasn't been determined whether it will be galvanized. Can you give us a rough quote? **** Hidden Message ***** Al Simon 15132 Company: Skylark Engineering, LLC Phone: (412) 277-4249 E-mail: asimon29@yahoo.com **** Hidden Message ***** asimon29@yahoo.com