Infill Beam The Secondary Beam used with the Decking Beam to form the Decking System. Made from Sheeted Components, unsed with Decking beams and the sheet thickness is 2mm and available lengths of 0.9mtr, 1mtr, 1.2mtr, 1.5mtr, 1.7mtr, 1.8mtr, 2mtr. Your Name (required) Your Email (required) Your Phone (required) Subject Your Message