3811 Prefabricated timber elements, supply (25) The supply of prefabricated timber and composite beams, frames and trusses, manufactured to individual requirements 3812 Timber platform (0) Structural timber platform, when constructed before the rest of the timber structural framing, forming the lower floor level of the structure, supported on timber foundations, piles, posts and stumps as a base for subsequent timber construction 3813 Engineered wood products (42) Engineered wood, laminated veneer lumber and laminated timber products for use as posts, beams, frames and other structural elements, manufactured to individual requirements 3814 Timber minor structural members and supports (3) Minor structural members and supports of timber 3815 Log wall construction (0) Timber framing using logs or shaped timber members as wall construction or as wall panels, with wall intersections either mitred and fitted, overlapped or fitted into a timber or metal frame