... ,corrosion resistance,antistatic and anti frame.Its service life is more than 30 years. FRP stairwell has advantageof light ... is especially suitable for humid and acidic enviroment.FRPstairwell consist of crossbeam,joist,fence,sealing plate,hook,ladder ans slab.The ... annual investment for FRP stairwell is only one-third for metal stairwell.so FRP stairwell is the perfect product to replace ...