Formwork H20 Timber Beam, also called H20 Wood beam, I Joist, I beam, Wood H beam or Wood Girder, is widely used in formwork systems, construction systems parts, Falsework systems, timber structures and other bearing structures .

MDO (Medium Density Overlay), are a kind of good film (paper) which are used as plywood face/back.

Black film of top quality has much better water resistant properties . So when you buy black film faced plywood, you had better confirm the quality of the black film paper with your suppliers . But please also keep in mind that black film paper of top quality is much more expensive than black film paper of economical quality .