Jun 25, 2022 · The braces shall be spaced not more than 4 feet (1219 mm) on center and the unbraced length of braces shall not exceed 8 feet (2438 mm) Spaced max no need to wait 60-90days after deposit Automatic CZ80-300 purlin roll forming machine Produce different purlin size without changing rollers or spacers The PBR metal roofing panels have a 36