Steel stair stringer
Steel stair stringer
(OP)
I am doing a design of a steel stringer . there is two PFC supporting precast concrete treads. According to code requirement i used 4kpa live load on tread.so point load on stringer say 1.5KN. my question is do we need to consider a situation where all the treads are full of 4kpa . so in stringer each and every point which connects to tread having point loads . is that correct or which way need to think? if anyone post an idea that would be helpful.






RE: Steel stair stringer
RE: Steel stair stringer
RE: Steel stair stringer
Parallel Flange Channel.
RE: Steel stair stringer
Thaidavid
RE: Steel stair stringer
The channels we use in the US (typically) have tapered flanges. Not sure if anyone uses PFC's here or how extensively they're used worldwide.
RE: Steel stair stringer
RE: Steel stair stringer
Maybe I'm mistaken that MC's are not used often. I hardly use them but others can chime in or say otherwise.
RE: Steel stair stringer
RE: Steel stair stringer
RE: Steel stair stringer
Like much of the world uses the metric system...except the US
RE: Steel stair stringer
Edit: Oh yeah, I meant to also say something relative to OP's question. In the US, we need to design the entire horizontal projection with 100 psf [4.8 kPa]. Each tread also has to be designed for a single point load of some magnitude (can't think of it right now; I'm thinking either 300 lbs [1.33 kN] or 1000 lbs [4.45 kN]). That point load is applied at center for bending check and at the end for shear check.
Juston Fluckey, SE, PE, AWS CWI
Engineering Consultant
RE: Steel stair stringer
Nearly all men can stand adversity, but if you want to test a man's character, give him power. Abraham Lincoln
RE: Steel stair stringer
Further I need to clarify something. I need to design a base plate for newel post in this stair . as per the attached sketch i use 4 bolts for the connection. is it require this newel post exactly be in middle or any arrangement as per my sketch is ok?
RE: Steel stair stringer
RE: Steel stair stringer