We don't have synonyms for rifter yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are lifter, rioter and drifter.
°one of a series of slopedbeams that extend from the ridge or hip to the downslope perimeter or eave, designed to support the roof deck and its associated loads.
°one of a series of slopedbeams that extend from the ridge or hip to the downslope perimeter or eave, designed to support the roof deck and its associated loads.