Timber_ Presentation at SVNIT, Surat

2,437 views

Published on

0 Comments
5 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
2,437
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
290
Comments
0
Likes
5
Embeds 0
No embeds

No notes for slide

Timber_ Presentation at SVNIT, Surat

  1. 1. Tutorial Presentation (2013-14) On Timber as a Construction Material Department of Civil Engineering Prepared By: Paritosh Vyas (U11CE079) Ganga Singh Chouhan(U11CE080) Kaushal Kumawat(U11CE081) Dharmesh Kaithwas(U11CE082)
  2. 2. Timber: The Preface Timber refers to wood used for construction works. In fact the word timber is derived from an old English word ‘Timbrian’ which means ‘to build’. A tree that yields good wood for construction is called ‘Standing Timber.’ After felling a tree, its branches are cut and its stem is roughly converted into pieces of suitable length, so that it can be transported to timber yard. By sawing, rough timber is converted into various commercial sizes like planks, battens, posts, beams etc. Such form of timber is known as converted timber. Timber was used as building material even by primitive man. Many ancient temples, palaces and bridges built with timber can be seen even today.
  3. 3. U S E S Timber as a cast and support for concrete casting of ; Beams Columns Slabs Foundation Source: Extension to EED, SVNIT While Bamboo is used for scaffolding in Asian countries, Timber is occasionally used in scaffolds as platforms and in shoring Source: Extension to EED, SVNIT
  4. 4. U S E S In zones with cold climates and earthquake prone areas, structures are entirely constructed out of timber. These buildings have a distinct architecture and all structural elements are made of timber. Hadimba Temple, Manali Timber is frequently used in the frames of doors and windows. Type of Wood used: Shorea robusta Vernacular name: Source: KAASHTHA Timber Traders, Surat
  5. 5. Pragati Woodply, Icchanath, Surat
  6. 6. Source: KAASHTHA Timber Traders, Surat
  7. 7. Types of Timber There are over 150 species of timber which are produced in India. Following are the chief varieties of timber trees which are used for engineering purposes in India: Terminalia arjuna ( Source: Google Images It is heavy and strong. It has such uses as beams, rafters, and posts. )
  8. 8. Cedrus deodara ( ) Source: Sample Deodar is in great demand as building material because of its durability, rot-resistant character and fine, close grain, which is capable of taking a high polish. Its historical use to construct religious temples and in landscaping around temples is well recorded.
  9. 9. Tectona grandis( ) Google Images Teak is often an effective material for the construction of both indoor and outdoor furniture. Teak's high oil content, high tensile strength and tight grain makes it particularly suitable for outdoor furniture applications. Teak is used extensively in India to make doors and window frames, furniture, and columns and beams in old type houses. It is very resistant to termite attacks.
  10. 10. Market Analysis  L Local Market Scenario - In the local market, most of the timber is imported. Only inferior woods are from domestic sources. - This is due to a ban on tree felling in India. - Imported timber also serves better quality. - This material is generally from African, South East Asian or Latin American countries. - So high costs of importing and processing makes timber a lavish feature of KAASHTHA Timber Mart, Nr. SOSYO Circle, Surat construction.
  11. 11. Workshop works - Once the material reaches port. It is transferrred to workshop by trucks (road ways). - EOT ( electric overhead travelling ) crane lifts logs from store to the working zone. - It travels over 2 rails on which motion is controlled by a powerful electric motor. KAASHTHA Timber Mart EOT Crane
  12. 12. table wood cutter Its blade fitted on a table by making a Grove on it. Its generally used for rough cutting. KAASHTHA Timber Mart It’s a multi purpose machine which is used for cutting , grooving as well as filing. KAASHTHA Timber Mart
  13. 13. Cost Comparison c - The rate of timber in market is given in terms of cubic feet. ( varying from 650 to nearly 4000 ) - The cost of timber generally depends on the measure of the white part in the woody brown color of sample. This is a feature which is important for furniture wood. - Its capability to bear compressive and tensile load. - Resistance to the environmental conditions. - Resistance to attack of insects. - On the size of trunk of tree available. - Non-uniformity in the internal texture of the timber.
  14. 14. Local Market Rates of Timber Sr. no. Timber type Market rate 1 Burma teak 3800-4000 2 Tanzania teak 3100-3200 3 Valsadiya teak 2800-3000 4 Burma border teak 2000 5 Ghana teak 1450-1550 6 Sevan 1900 7 Saal teak 1200-1300 8 Pine 650 *the given rates are in cubic feet.
  15. 15. Defects in Timber An irregularity or abnormality occurring in or on the surface of timber Defects are responsible for the following; Reduction in Strength Lowering of Durability Poor Appearance Decay 
  16. 16. Google Image Results
  17. 17. Classification of Defects Natural Forces Fungi Insects Seasoning Conversion
  18. 18. Defects due to Natural Forces Chemical Stain: Discoloration caused external agency. by Rind Galls: Source: Ovara,Old Surat Rind means bark and gall means abnormal growth. The peculiar curved swelling developed on the body of a tree at points where branches have been improperly cut off or removed. Location: CED parking Lot
  19. 19. Defects due to Natural Forces Coarse Grained: If the tree grows rapidly, the annual rings are widened. Such a timber possesses less strength. Knots: The portion from which branch is removed receives nourishment for a long time and results in the formation of dark hard rings called knots. Continuity of wood fibers is broken by knots, they induce weakness. KAASHTHA Timber Mart
  20. 20. Defects due to Natural Forces Shakes: These are longitudinal separations in wood between the annual rings. These are cracks which partly or completely separate fibres of wood. KAASHTHA Timber Mart Twisted Fibres: These are also known as wandering hearts and are caused by the twisting of young trees by fast blowing wind. Unsuitable for sawing. Location: CED Parking Lot
  21. 21. Beetles Defects Caused by Insects Termites Google Images Google Images Tunnel formation by larvae of beetle, bore holes of 2 mm diameter. Convert Timber to a flour like powder. Do not disturb the outer shell or cover Live in colony and multiply fast. Bore tunnels without disturbing outer core. The Timber piece may look sound until completely hollowed. Good quality timber like Teak, Sal etc. can resist action of termites.
  22. 22. Defects Due to Fungi Wet Rot: Dry Rot: KAASHTHA Timber Mart CHEMICAL DECOMPOSITIONGREYISH BROWN POWDER.-UNSEASONED OR IMPROPERLY SEASONED TIMBER EXPOSED TO RAIN AND WIND WELL SEASONED TIMBER USED FOR EXTERIOR OR UNDERGROUND WORK COVERED BY TAR OR PAINT- PROTECTION AGAINST MOISTURE DRY POWDERFORM-NO FREE CIRCULATION OF AIR SUCH AS IMPROPERLY VENTILATED BASEMENTS,ROOMS AND DAMPED SITUATIONLIKE KITCHEN TOILET ETC -ABSENCE OF SUNLIGHT,DAMPNESS,PRESENCE OF SAP,STAGNANT AIR AND WARMTH - FREE FROM SAP- COPPER SULPHATE
  23. 23. Defects during Conversion Chip Mark: This defect is indicated by a mark or sign placed on the finished surface of timber. Formed by Planing machine. KAASHTHA Timber Mart Diagonal Grain: Formed due to improper Sawing of timber Indicated by diagonal marks on straight grained surface of timber.
  24. 24. What If
  25. 25. Thank You.

×