Respond to these showcases www. ajplus. co. uk/ajdirect Readers may obtain information about these products by filling in the enquiry numbers on an AJ enquiry card. Advertisers wishing to promote their products on these pages should contact Chris Bond on 020 75056816 Part of Belfast's regeneration plans, the eight-storey City Exchange office development features a glazed corner in System 17 curtain walling, incorporating aero-foil horizontal cover caps and louvre infill panels. The building has over 500 System 4-20 casement windows with anti-sun glass.