Ring your manufacture; there are too many variables to be of assistance.
I do a lot of FRP work, and I can tell you now that there are no two similar products.
Also we need more info the type of stairs you have and the FRP sections you plan to use ie SHS, Channel, ????, all these change the type of FRP material you have.........
Exactly right, RE....I've worked with FRP shells and structural members....properties are not standardized and depend completely on the manufacturer's process and section properties.
Thanks, I do not know what sections I will be using. This is my first FRP stair design. I will contact a manufactures and get their recommendations on the material, sections and connections.
on setup of design for FRP, the sections you can generally get from the market are similar to steel. You can get UB, PFC, SHS ect. So for concept design you can start with these sections aka a typical steel setup(I like to use RHS stringers they generally have better Shear strength). Then slook to use some grating as treats. I would connect the lot with stainless steel but you can use FRP connections, if so make sure you get some testing data, for the angle in this type of loading. They should be able to provide you with lots of strength data, if not don’t use them.
Things to keep in mind are, generally FRP has a greater tension and compression ultimate strength, "E" is lower and shear strength is lower compared to steel.
maybe worth taking a look at this website, I don't use these products myself so don't recommend either way, but it will give you an idea of what you can do.
