I am planning to build a pole barn for hay storage and would like to know your recommendation for truss design, spacing,size material for perlins, post etc. a 4 and 12 pitch is what i think would be sufficent.. Bailey barns constructs steel truss pole barns in the tri-state area. we install and deliver kits and/or materials in florida, georgia, and alabama. find this pin and more on pole barns by chris. steel trusses pressure treated post metal roofing pole barn kits and in-house install free quotes cheap pricing quality products full install available.. If you plan to finish the ceiling of your pole building with metal or gypsum board and pole barn insulation, be sure to let us know so we can design a heavier load on the bottom chord of the truss. for a metal ceiling with pole barn insulation we recommend a 5 psf load. for gypsum board and pole barn insulation we recommend a 10 psf load..
