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Curved Stair Stringers for Spiral Staircases

Chicago Metal Rolled Products makes circular metal custom stair stringers that are big, true, and plumb. After we manufacture your curved custom stair stringer, we deliver them in a quick and timely fashion. Very often the structural steel that the custom stair stringer is manufactured from is exposed and therefore must meet AESS (Architecturally Exposed Structural Steel) quality standards.

Spiral Staircase & Custom Stair Stringer Images


Curved Custom Stair Stringer Capacities 

Chicago Metal forms challenging helixes from the smallest to the largest size plates (3 in. x 60 in.), channel (C18 x 54.7), tube (18 in. x 6 in.), pipe (24 in.), or beam (W30 x 99). Turn-around times are from 1-1/2 to 2 weeks. In addition to providing a constant radius for metal custom stair stringer and curved custom stair stringer capacities. Chicago Metal can make curved custom stair stringers for elliptical, reverse curved, and varying width spiral stair cases. 

We created an impressive curved stairwell for Drexel University by utilizing 2 x 16 rolled steel flats. For the inside custom stair stringer, the flats were curved helically to a 4 feet 4 inch inside radius, with a walk-up-turn-left pitch of 33.25 degrees. We then rolled the flats for the outside custom stair stringer to a 9 foot inside radius with a walk-up-turn-left pitch of 16.92 degrees.

Metal Custom Stair Stringer: Value-Added Services

Having a true, plumb, and accurate dimension is the greatest value a quality curved custom stair stringer can add. Our curved custom stair stringers are also double checked for 100%-dimensional accuracy. Holes can also be added to the web of helical channels within a curved custom stair stringer. This allows the treads to be bolted on in the field, which provides for an easier spiral staircase assembly process.

Metal Custom Stair Stringer Applications 

  • Drexel & St. Thomas Universities - Monumental spiral staircases can be found in various college student centers around the world, including the ones at Drexel University and the University of St. Thomas. Both centers have high, large atriums which were designed to bring students, faculty and staff together for planned and random encounters. Drexel University used 2 x 16 steel flats, which were rolled to create an impressive curved staircase. For the inside curved custom stair stringers, the flats were curved helically to a 4 foot 4 inch inside radius with a walk-up-turn-left pitch of 33.25 degrees. For the outside metal custom stair stringers, the flats were rolled to a 9 foot inside radius with a walk-up-turn-left pitch of 16.92 degrees.
  • McCormick Tribune Freedom Museum - An elliptical spiral staircase links floors in this museum which is located next to the Tribune Tower in downtown Chicago. 
  • Corporate Headquarters & Mega-Mansions - Numerous large circular spiral staircases have been created with Chicago Metal handrails and metal custom stair stringers for corporate headquarters and mega-mansions around the country.

Contact us for more information on our curved staircase and metal custom stair stringer products

Click here to view more images of our spiral staircase projects

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Testimonials

  • "A big thank you to your team. Your parts are receiving the most positive feedback possible. Your company has new fans here."
    Bruce E., Kansas
  • "Without CMRP able to roll these channels to my specifications, there was no way this beautiful round antenna would have ever worked. 
    Damon S., Wisconsin
  • "My customer has installed several truck loads worth of 36" x 160# WF beams you rolled and cambered for us. The quality is spot on."
    Justin J., Alabama
  • "The rolled stringers were right on the button as far as pitch and radius."
    Bob O., Illinois
  • "I really appreciate your company coming through on this order & expediting the material when you said you would.You stick by their word."
    Jason R., Missouri
  • "The last order of rings were the best that we have received from you. The flanges were all flat. Keep them coming like that."
    Lenny P., Ohio
  • "Thanks for OVER AND ABOVE EXCELLENT SERVICE.  The quality and accuracy of CMRP's work is outstanding"
    Peggy, Texas
  • "The ring looks good! The OD is dead on. Thank you for your concerns regarding our questions and responding so quickly. I was impressed!"
    Fran Z., Pennsylvania
  • "Please pass on to the workers, . . . (your) rings . . . were some of the best our fitter has seen."
    Jeff K., Illinois
  • "I want to thank CMRP for exceeding what you promised. You are ahead of schedule and the strakes are fitting great."
    Jim A., New York
  • "Your advice was a significant contribution to the project.  You provide excellent service and knowledge"
    John Z., Illinois
  • "These pipes were rolled DEAD ON. The shop guys said they had never seen a pipe come in and hit every point like that in a long long time."
    Joe C., Missouri
  • "The rolling on these rectangular tubes was absolutely perfect! Barely any adjustment needed to be made."
    Tom G., Massachusetts
  • “We just placed an order for Rolled Angle Rings & you delivered them to us within 2-1/2 days ... we are three states away.”
    Jim S., Pennsylvania
  • “I would like a quote on a spiral project. I have heard many good things about your quality and timeliness from other fabricators.”
    Ryan L., Utah
  • “The rolled beams were delivered yesterday and look very good. Thank you for great service!”
    Thomas S., Maine
  • “I’ve worked with CMRP for over 16 years and can rely on them for any size job and in any time frame. CMRP delivers every time.”
    Mindy, H., Indiana
  • “It is unbelievable how good a job you guys did rolling these beams.”
    Richard G., Canada
  • “You all helped us out greatly when no one else seemed they could. Everything worked out wonderfully!”
    Cliff P., Florida
  • “The parts are very impressive and the service was stellar. I will certainly be recommending you to anyone needing such services.”
    Randy W., Georgia
  • “We got everything we needed in a very short turnaround, I appreciate it.  We are happy to have a reliable source to turn to.”
    Russell P., Illinois
  • “Quote was great! Timely, appropriate, and frankly less money than we expected.”
    James L., New York
  • “CMRP immediately took action and shipped out my order the same day! This all happened like clockwork, allowing us to meet the deadline.”
    Margo R., Ohio
  • “We only use CMRP for our rolling needs. We can always depend on getting a finished product that is to our expectations or better.”
    David P., New York
  • “I wish everyone could get quotes back that fast! That is why we use you, fast response to quotes and questions and great quality!”
    Will F., Indiana
  • “Your quotes are always so well organized and thorough, I trust your work.”
    Jessica, South Carolina
  • “On larger more complex rolling items, I typically only go to Chicago Metal Rolled Products for pricing due to quality.”
    Kevin H., Pennsylvania
  • “Thanks for providing the material. First two sets were laid out and fabricated. Radius was excellent!”
    Brad, Iowa
  • “We really appreciate your work on this. Amazing attention for a smaller sized job. Thank you for coming through.”
    Erik J., New York
  • “The project was AMAZING! Thank you so much for your help. I really do appreciate it. Always a pleasure doing business with you.”
    Kelly E., Iowa
  • “Your salesman provided a quick quote with an offer to explain things we should take into account. It's known you guys do the best work.”
    Mark R., Maryland
  • “Thank you for your help with the project and for getting everything complete and shipped out in a such a timely fashion. You guys saved the day.”
    Ben B., Florida
  • “You guys did an amazing job on these stringers. We would NOT be having such a success story without your team's effort & patience!”
    David B., Oklahoma
  • “You gave me excellent service and help which I appreciated very much. Material was on time and right on spec.”
    Brian S., Pennsylvania
  • “Your positive attitude is noted & CMRP reputation in the steel industry is impressive. All of our locations will contact you in the future.”
    Dave B., North Carolina
  • “My boilermakers in the field had positive things to say about the quality and accuracy of the angles that you rolled. Thank you.”
    Walter L., New York
  • “The project is complete and our customer is very pleased. I appreciate your diligence and quality on this one.”
    Dusty A., Texas
  • “CMRP has been instrumental in our ability to deliver high quality & great looking parts. Any job, big or small, CMRP has come through.”
    Eddie C., Kansas
  • “Your rolled steel worked great! We check lengths & chord dimensions ...everything was within an 1/8".”
    Don L., Michigan
  • “We received our order on time and the level of workmanship is excellent!"
    Roger R., Georgia
  • “Your company did a great job rolling these parts. Our fab and installation is going very well thanks to the quality of your work."
    Ronnie S., North Carolina
  • “Your company is the only one that was able to give me a quote that was right on with my specs, everyone else had to modify at least one dimension."
    Adam S., Minnesota
  • “Thank you for the follow through & turn around time, it greatly helps in the environment that exists today."
    Don F., Nevada
  • “This was our first experience with your company & I was very impressed with all aspects."
    Rick N., Minnesota
  • “I want all to know your hard work and efforts have not gone without appreciation."
    Lance B., Minnesota
  • “The accuracy and quality of your product put a smile on our foremans face - that is hard to come by."
    Jonathan S., New York
  • “Competitive price. Beat the schedule. No complaints from the project site."
    Lane K., Florida