... disassembly,flexible application make the easy way to operate on building site; 4.Low cost,recycle resource,encironmental protection,can be ... and other accessories. size:The standard size of H timber beam: H16, H20, H24Standard lengths: 2.45m, 2.9m, 3.0m ... .3m, 3.6m, 3.9m, 4.9m, 5.9m.Other beam length or web thickness is available on request.