thin layers below the bark innermost annular rings around the pith portion of timber between heartwood and cambium layer thin fibre which extends from the pith outwards and holds the annular rings together
Answer Discuss in Comment
has good strength along the panel only cannot be bent more easily than ordinary wood of same thickness can be spilt in the plane of the panel has greater impact resistance to blows than ordinary wood
heart wood annular rings cambium layer medullary rays
pugging moulding drying kneading
drying of bricks burning of bricks preparation of clay moulding of clay
200 mm x 200 mm x 100 mm 200 mm x 100 mm x 100 mm 190 mm x 190 mm x 90 mm 190 mm x 90 mm x 80 mm
5% 15% 25% 35%
plank baulk log batten
greater tensile strength in longer direction greater tensile strength in shorter direction same tensile strength in all directions none of the above
lack of ventilation alternate wet and dry conditions complete submergence in water none of the above
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