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Specifying Timber For Building Construction
Specifying Timber For Building Construction
| SG 1 | SG 2 | SG 3 | SG 4 | SG 5 | SG 6 | SG 7 |
|---|---|---|---|---|---|---|
| (A) NATURALLY DURABLE | ||||||
| Balau | Belian | Bekak | Giam | Tembusu | ||
| Bitis | Mata Ulat | Delek | Malabera | |||
| Chengal | Kekatong | Keranji | Merbau | |||
| Penaga | Resak | |||||
| (B) REQUIRING TREATMENT | ||||||
| Dedalu | Balau, red | Berangan | Alan Bunga | Bayur | Ara | |
| Kempas | Kelat | Dedali | Babai | Damar Minyak | Batai | |
| Merbatu | Kembang Semangkok | Derum | Balek Angin openg | Durian | Geronggang | |
| Mertas | Kulim | Kapur | Bintangor | Jelutong | Laran | |
| Pauh Kijang | Kasai | Brazil nut | Jongkong | Pelajau | ||
| Penyau | Keruntum | Gerutu | Kasah | Pulai | ||
| Perah | Mempening | Kedondong | Machang | Sesendok | ||
| Petaling | Meransi | Keledang | Medang | Terentang | ||
| Ranggu | Meranti Bakau | Keruing | Melantai/Kawang | |||
| Ru | Merawan | Ketapang | Meranti, Light Red | |||
| Surian Batu | Merpauh | Kungkur | Meranti, Yellow | |||
| Tualang | Nyalin | Rubberwood | Mersawa | |||
| Perupok | Melunak | Sengkurat | ||||
| Punah | Mempisang | Terap | ||||
| Rengas | Mengkulang | |||||
| Simpoh | Meranti, Dark Red | |||||
| Meranti, White | ||||||
| Nyatoh | ||||||
| Penarahan | ||||||
| Petai | ||||||
| Ramin | ||||||
| Sengkuang | ||||||
| Sepetir | ||||||
| Tetebu | ||||||
NOTES:
- For naturally durable timbers, sapwood should be excluded. If sapwood is included, preservative treatment is necessary. (Source-MS 360:1986)
- For timber requiring treatment, they should be amenable to preservative treatment.
Strength Groups Of Timber And Their Applications
| Applications | Strength Group | Maximum m.c. at time of installation for non air-conditioned application | Maximum m.c. at time of installation for air-conditioned application |
|---|---|---|---|
| Structural Components * Columns, beams, bearer, studs, joists, ties and struts * Form work |
* SG 1, SG 2, SG 3 AND SG 4 * SG 1, SG 2, SG 3, SG 4 AND SG 5 |
30% (Thickness >100 mm) 25% (Thickness <100 mm) |
Not applicable Not applicable |
| Roofing * Rafters, ties, struts, purlins and bracing * Battens |
* SG 1, SG 2, SG 3 AND SG 4 * SG 1, SG 2, SG 3, SG 4 AND SG 5 |
30% 25% |
Not applicable Not applicable |
| Staircase * Stringers, treads, trimmer beam and handrail * Balustrades |
* SG 1, SG 2, SG 3 AND SG 4 * SG 1, SG 2, SG 3, SG 4, SG 5 AND SG 6 |
19% 19% |
12% 12% |
| Flooring * Floor boarding and parquetry * Skirtings |
* SG 1, SG 2, SG 3, SG 4 AND SG 5 * SG 1, SG 2, SG 3, SG 4, SG 5 AND SG 6 |
19% 19% |
12% 12% |
| Walling * Wall, partition framing and external wall boardings * Internal wall boardings, slates screens * Fascia boards |
* SG 1, SG 2, SG 3, SG 4, SG 5 AND SG 6 * SG 1, SG 2, SG 3, SG 4, SG 5, SG 6 AND SG 7 * SG 1, SG 2, SG 3 AND SG 4 |
19% 19% 19% 19% |
12% Not applicable 12% Not applicable |
| Ceiling Frames * Cover battens to joints of ceiling sheets * Ceiling strips and soffit battens |
* SG 1, SG 2, SG 3 AND SG 4 * SG 1, SG 2, SG 3, SG 4, SG 5 AND SG 6 |
25% 19% |
Not applicable 12% |
| Door & WIndow Frames * Door, window and vent frames including their stops and grounds * Door leaves, window and vent sashes |
* SG 1, SG 2, SG 3 AND SG 4 * SG 1, SG 2, SG 3, SG 4 , SG 5 AND SG 6 |
19% 19% |
12% 12% |
| Furniture * Built-in fittings, furniture generally and workshop furniture * Science laboratory tops |
* SG 1, SG 2, SG 3, SG 4, SG 5 AND SG 6 * SG 1, SG 2, SG 3 AND SG 4 |
19% 19% 19% |
12% 12% 12% |
| Beading fillets and edgings generally | * SG 1, SG 2, SG 3, SG 4, SG 5 AND SG 6 | 19% | 12% |
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