... forest resources, it meets the trend of saving the earth.UV-protected, anti-mildew, anti-freezing and cracking, anti-slip ,flame ... ” to 14”, the joist can be wpc or real timber.b, Screw the wpc decking boards onto the joists one by ... CE, FSC certified, passed ROHS, SGS, CTI test Project example UV-protected Anti-freezing Anti-slip outdoor wpc decking