Commercial Stair ProjectsDiving Platform Spiral Stair This multilevel stairway reaches three stories on a diving platform. A special landing has been added on the first level allowing access to a second stairway reaching an additional diving platform. The stairs are 60" diameter with 30 degree, 12 gauge, steel pan type treads with a cool deck inlay. The landings are made of 12 gauge pan steel with reinforcing braces and a cool deck inlay. Each tread has two 1" square balusters ant the handrail is 1 1/2" round steel. Because of the height of the stairway, a heavy duty center column was constructed using 3 1/2" I D schedule 80 round pipe. The factory finish is a galvanize coating and was painted Blue at the job site. 
Model # 96 S Steel Spiral Stair This is a steel, 96" diameter, 8 line rail stair. The rail system is made of 1 1/2" round, 16 gauge tubing with the rails spaced less than 4" apart. The height of the handrail is 34" from the tread nosing to the top of the rail. The height of the rail at the landings is 42" high from the nose to the top of the handrail. The posts are also made out of the same 1 1/2" round material. This stair has radial grate treads made of 3/16" thick steel with a radial grate rest landing at the mid point and a rectangular landing at the top. The center column is made of a heavy duty 6" I D schedule 40 round pipe. The stair was built in one section and then spliced for shipment. 
Observation Tower Spiral Stairs This stairway provides access to a football practice facility observation tower. It is a 60" diameter stair and is approximately 40’ tall. The stair was fabricated in one section and then spliced into three sections for shipment for reassembly at the job site. The treads are constructed out of 12 gauge checker plate steel. There are four 1" square balusters per tread for a minimum of 4" spacing per UBC code. The handrail is a 1 1/2" round tubing. The center column is a 3 1/2" ID schedule 40 round pipe with lateral braces at the mid point. The stair was shipped with a red oxide primer with a coat of semi gloss black paint applied by the owner at location. 
Modern Commercial Office Welded Spiral Stair: The stair pictured here has a diameter of 11' (132"). This is an unusual design since it is designed for two way traffic. The stair was delivered to Kansas City, KS and the freight elevator was the only available means to lift this spiral stair to the fifth floor, where it was installed. This particular stair was designed to be built in four sections. Each section was designed to bolt together, then to be field welded for added strength. An inside handrail was used to ensure two way traffic. A spiral stair rail system uses a 1 1/2" round handrail, with 1" round balusters and 4" spacing. Our advertising shows our largest spiral stair diameter at 96", remember the stair shown here has a diameter of 132" - we will always design and build to your specific needs. 
Space Saving Steel Spiral Staircase This elegant spiral staircase gives a contemporary feel to the 55th floor of a high rise commercial building in downtown Chicago. 88 inches in total diameter, this project’s multilevel steel spiral staircase seamlessly connects two floors with pantype steps and a pipe railing system. Not visible in this photo, the upstairs opening of the staircase is surrounded on 270 degrees by a matching railing, completing the staircase aesthetically and in regards to safety. The building’s architects were able to design the dimensions of this spiral staircase by referencing the measurements and specifications listed on our catalog of component parts, available at StairwaysInc.com. After supplying Stairways, Inc with the design specifications and the dimensions of the fright elevator which would be used to hoist the stairs, our team designed and assembled the staircase, which was then shipped to the customer in sections. For this particular application, purchasing a fully assembled spiral staircase was more cost effective than purchasing a spiral stair kit, since a stair kit would have required more man hours for on-site assembly. Using the fully assembled staircase, installers needed only to connect the spiral staircase to the top and bottom of the structure and fill in the pantype steps with concrete, saving the customer time, money and effort. Stairways, Inc. |