Steel staircase question

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Wondering if anyone has experience with building steel staircases. I understand there are code issues which I want to do my best to meet, so I'm looking for recommendations on the size of stringer and how to calculate the step run and height between each.Here is some info that may be helpful.  I want to do a single stringer centered under each step, so the steps will cantilever out about a 1' 6" on each side.  The deck of the top landing is 6' above the lower deck. The lateral distance between the edge of the top deck to the lower deck is about 5'.  So for the stringer, what type of steel and size would meet code for this? Also, what would be the proper run of each step and height between each?I was thinking either Ibeam or rectangular tubing for the stringer, any thoughts appreciated.
Reply:welcome back billy boy.    for outdoor apts/condos/offices etc in my area, they  gone too double stringers, can give step better support.      single is older buildings, and also seen two channel irons, welded face to face make single stringer.       id check ur local codes and observe whats currently being installed in ur area.Last edited by 123weld; 1 Day Ago at 03:00 PM.
Reply:There is a step calculator for the rise and run.  Several folk have posted them on this forum.  First, make sure the building will accommodate the steps, you intend to fabricate.  Call your local building authorities for code requirements.  Seems like you are  using codes with design constraints interchangeably?  When I hear codes I think building codes. You are asking about design.  Submit your plans to an engineer.  Good luck
Reply:

Originally Posted by Billy Brewer

Wondering if anyone has experience with building steel staircases. I understand there are code issues which I want to do my best to meet, so I'm looking for recommendations on the size of stringer and how to calculate the step run and height between each. ...
Reply:See your local building department for staircases. In some cases it call a latter for maintenance then a different code. My drawings are to old to help as change the codes. Dave

Originally Posted by Billy Brewer

Wondering if anyone has experience with building steel staircases. I understand there are code issues which I want to do my best to meet, so I'm looking for recommendations on the size of stringer and how to calculate the step run and height between each.Here is some info that may be helpful.  I want to do a single stringer centered under each step, so the steps will cantilever out about a 1' 6" on each side.  The deck of the top landing is 6' above the lower deck. The lateral distance between the edge of the top deck to the lower deck is about 5'.  So for the stringer, what type of steel and size would meet code for this? Also, what would be the proper run of each step and height between each?I was thinking either Ibeam or rectangular tubing for the stringer, any thoughts appreciated.
Reply:

Originally Posted by 123weld

single is older buildings, and also seen two channel irons, welded face to face make single stringer.       id check ur local codes and observe whats currently being installed in ur area.
Reply:

Originally Posted by tapwelder

There is a step calculator for the rise and run.  Several folk have posted them on this forum.  First, make sure the building will accommodate the steps, you intend to fabricate.  Call your local building authorities for code requirements.  Seems like you are  using codes with design constraints interchangeably?  When I hear codes I think building codes. You are asking about design.  Submit your plans to an engineer.  Good luck
Reply:

Originally Posted by Oldiron2

Besides structural codes, might the situation require adhering to ADA requirements? Some states like californiA have more rigorous requirements than the Federal law.
Reply:Again.  Make sure the house will accommodate steps per local building code.
Reply:It's junior channel that comes in 8 inch or 10 inch that is used for building stair stringers🤪
Reply:Get a Swanson speed square with the book.That book will tell you everything you need to know about/how to, building stairs. All you have to do is factor in the thickness of your step material. It will also tell you how to do rafters. That book and square is really beginning carpentry 101. I've never had a code problem with it in 28 states. But double check where you are to see if you need an engineer stamp with them being made of steel.Lincoln 330MPXLincoln Power Mig 256Lincoln LN-25X Wire FeederMagnum PRO 250LX GT Spool GunLincoln AC/DC 225¼ Ton of Torches OFC-A OFG-AAir Carbon Arc Gouging CAC-AEverlast 62i Plasma CutterIngersoll Rand T-30 14hpInstagram: #Freebird Welds
Reply:NOMMA has a video on stair making.  I bought one 20 yrs ago.  I still use that technique for double stringers.  For monostringer you will need to make some good fixtures. Easy work after that.  I would assume an I-beam would need to be pretty substantial to resist twisting compared to like size tubing.  I have always used tubing.  Good luck
Reply:

Originally Posted by Billy Brewer

Thanks. So basically making a tube out of two channels ( is there a reason to not choose tube steel?). What size channel did you usually use? The stringer shouldn't be more than 7' long and steel plates will be mounted for steps- which is another question, how thick should the plates be?