Size:standard lengths :2.9m,3.3m,3.6m and3.9,.other lengths available on request Flange width:80mm.thickness:40mm Web thickness;27mm For construction use. Made of high-grade solid sawn Pine lumber and Pine plywood. Prefabricated wood I-joists are manufactured in a range of sizes. Long lengths use fingerjoining to splice flanges and butt jointing or toothed, tongue and groove or scarf configurations to splice the webs. The actual length is limited only by transportation restrictions. Weight per running meter: 5.2-5.8 kg Mechanical specification: