Polycarbonate Glazing bars designed and manufactured by C & A for use with multiwall polycarbonate sheets. With a choice of Frame supported glazing bars for fixing to timber, aluminium or steel sub-frame or our self supporting glazing bars that require only front supporting posts. Whether you want a low cost way of joining polycarbonate sheets on a timber framework, or you require self-supporting aluminium glazing bars, we have one to suite.