load span tables floorspan beam block floors the complete guide floor to beam es esgram concrete beam hollow block flooring what size floor joist to span 10 12 floor beam span tables calculator floor joist sizing and span in beam arrangement and floor plate span load tables floorspan floor beam span tables calculator 12 prestressed concrete floor joist wideslab load span tables concast north ina residential code beam and clay block floor systems oregon residential specialty code engineered floor joist span beam and clay block floor systems beam arrangement and floor plate floor beam span tables calculator