By-products of timber include ply-wood, defined as having three or more layers of thin wood laid with grains crosswise and joined together under pressure by adhesive; Chipboard/fibreboard comprising compressed and glued wood-chips and fibres; and Blockboard, odd cuts of timber, squared-off and lined by plywood. These products are extensively used in the construction and packaging industries and each must be kept dry and stowed underdeck to avoid serious damage, warping and rotting.
Their manufacture is often in sheets bundled together in units, the edges of which may be protected by strips of timber marginally increasing the overall measurements of the sheets. Alternative methods include transportation on pallets.
- Plywood Unitised Stowage Factor 70/80
- Chipboard Unitised Stowage Factor 55/65