Timber Defects

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Timber Defects

  1. 1. IN TIMBER Written by JOHN STAGG DEFECTSDEFECTS
  2. 2. Defects in Timber ‘Defect’, in this case, means anything that effects the structural integrity or appearance of timber. Remember… There are as many potential defects as there are uses for timber. Click your mouse once to continue
  3. 3. By the end of this session you should be able to: Identify three defects effecting timber State the remedial action to be taken in each of the three cases Defects in Timber Click your mouse once to continue
  4. 4. Things that attack timber Click your mouse once to continue
  5. 5. Defects in timber Timber is a natural material that is prone to defects. One of these is the tendency to split if it is put under stress from rapid drying, poor felling or de-lamination of the growth rings. These defects are all known as ‘Shakes’ Click your mouse once to continue
  6. 6. Shakes Click your mouse once to continue
  7. 7. What other defects occur in timber? Dry rot Click your mouse once to continue
  8. 8. What other defects occur in timber? pith juvenile heart sap Blue stain Click your mouse once to continue
  9. 9. What other defects occur in timber? Click your mouse once to continue Insect attack
  10. 10. What other defects occur in timber? Click your mouse once to continue Shrinkage
  11. 11. Further considerations What other defects may occur in timber or timber structures? What circumstance or working load may, over time, cause timber or timber structures to fail? Click your mouse once to continue
  12. 12. Construction Department Defects in TimberEnd GO AGAIN END

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