Hello,
I am designing a metallic folding staircase on which i have to assign a live load of 500 pounds person how do i assign? the folding staircase is connected cantilever to a platform at certain height. since there will be a vast difference in loading condition as floor load and as point load in relative displacement of the structure. Also a chain is used to support when the structure is in use what do i do to model a chain in staad? should I use cable or tension member command to define the chain in staad?