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Merpau
Merpau (Swintonia spicifera)

Family: Anacardiaceae

Common names: Merpau, Merpauh, Merpauh daun tebal, Merpauh dawn tebal, Pitoh, Selan

Distributed in: Brunei, Malaysia (Oceania and S.E. Asia)

Common uses: Boat building (general), Heavy construction, Light construction, Matches

Colors: the heart isReddish brown, Yellow to golden-yellow to orangeand the sapwoodRed, White to yellow.The grain isInterlocked, the textureUniformand the lusterPronounced

Natural durability: Susceptible to attack from termites (Isoptera), Susceptible to marine borer attack

Kiln Schedules: Drying (speed) is fast

Drying Defects: Slight twist/warp, Splitting

Ease of Drying: Thick Stock Requires Care

Tree Identification: Bole/stem form is buttressed

Blunting Effect: Moderate

Boring: Fairly easy to very easy

Carving: Fairly Easy to Very Easy

Cutting Resistance: Easy to saw

Gluing: Fair to Good Results

Mortising: Fairly Easy to Very Easy

Moulding: Fairly Easy to Very Easy

Movement in Service: Fairly Easy to Very Easy

Nailing: Easy to nail, Pre-Boring Recommended

Planing: Planes well, to a good finish

Resistance to Impregnation: Resistant sapwood

Response to hand tools: Responds Readily

Routing recessing: Fairly Easy to Very Easy

Sanding: Fair to Good Results

Veneering qualities: Suitable for slicing

Steam bending: Fair to Good Results

Screwing: Fair to Good Results, Pre-boring recommended; Turning: Poor results

Polishing: Fair to Good; Staining: Very Good to Excellent;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 721 kg/m3
Bending Strength 542 849 kg/cm2
Crushing Strength 380 574 kg/cm2
Hardness 752 kg
Impact Strength 86 cm
Shearing Strength 200 kg/cm2
Stiffness 152 175 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 2 %
Weight 705 560 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 7711 12078 psi
Density 45 lbs/ft3
Hardness 1658 lbs
Impact Strength 34 inches
Maximum Crushing Strength 5408 8171 psi
Shearing Strength 2847 psi
Stiffness 2167 2494 1000 psi
Weight 44 35 lbs/ft3
Radial Shrinkage 2 %
Tangential Shrinkage 4 %

Density (dry weight) = 46-52 lbs/cu. ft.
Shearing strength (parallel to grain) = high
Modulus of Elasticity (stiffness) = high
Hardness (side grain) = medium
Density (dry weight) = 38-45 lbs/cu. ft.
Toughness-Hammer drop (Impact Strength) = medium
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Tangential = very small
Shrinkage, Radial = very small
Max. crushing strength = medium
Max. crushing strength = high
Bending strength (MOR) = medium
Bending strength (MOR) = low

Browne, F.G.,1955,Forest Trees of Sarawak and Brunei and their Products.,Government Printing Office, Kuching, SarawakBrown, W.H.,1978,Timbers of the World, No. 4 South East Asia,TRADA, Red Booklet SeriesBurgess, P.F.,1966,Timbers of Sabah,Sabah Forest Record, no.6Desch, H.E.,1954,Manual of Malayan Timbers (2 vols,Malayan Forest Records,no.15Lee, Y.H., et al,1974,Commercial Timbers of Peninsular Malaysia,Kuala Lumpur Malaysia Department of Forestry Peninsular Malaysia and,Malaysian Timber Industry BoardLee, Y.H., Lopez, D.T.,1968,The Machining Properties of some Malayan Timbers,Malayan Forester,3,pp194-210Lee, Y.H.,1965,Timber tests - merpauh (Swintonia spp.,Malayan Forester 28(1) pp56-62Menon, P.K.B.,1959,The wood anatomy of Malayan timbers: commercial timbers, 3. Light,hardwoods,Malaysian Forest Research Institute Kepong, Research Pamplet, No. 27.Ng, F.S.P. (Ed,1989,Tree Flora of Malaya A Manual for Foresters Volume 4,Forest Research Institute Malaysia Ministry of Primary Industries
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